1 00:00:00,000 --> 00:00:03,340 do not try what you're about to see at home. 2 00:00:03,340 --> 00:00:05,340 We're what you call experts. 3 00:00:05,340 --> 00:00:06,180 Ow! 4 00:00:09,180 --> 00:00:11,380 On this episode of Mythbusters, 5 00:00:11,380 --> 00:00:15,380 the Heinemann and Captain Redbeard 6 00:00:15,380 --> 00:00:18,580 take a swing at a pirate movie myth. 7 00:00:18,580 --> 00:00:22,220 It's another remote control rig for making Jamie dance. 8 00:00:22,220 --> 00:00:23,620 Act yourself out, buddy. 9 00:00:23,620 --> 00:00:26,020 Imprisoned inside a bone cage, 10 00:00:26,020 --> 00:00:28,000 can you swing across a ravine? 11 00:00:28,000 --> 00:00:29,160 I think I'm gonna throw up. 12 00:00:29,960 --> 00:00:31,460 And climb to safety. 13 00:00:33,260 --> 00:00:34,160 They're at! 14 00:00:34,160 --> 00:00:35,160 Meanwhile, 15 00:00:35,960 --> 00:00:37,340 Carrie Torian Grant 16 00:00:38,600 --> 00:00:40,500 rolled out the mythical barrel. 17 00:00:40,500 --> 00:00:42,600 Is a honing me bar in the hall, doesn't it? 18 00:00:42,600 --> 00:00:44,180 Attesting the urban legend 19 00:00:44,180 --> 00:00:46,440 that a drum, mythenal, and a flang 20 00:00:47,540 --> 00:00:49,240 could send a barrel ballistic... 21 00:00:52,240 --> 00:00:53,780 That thing might explode! 22 00:00:53,780 --> 00:00:55,880 ...and turn a go-kart turbo. 23 00:01:00,160 --> 00:01:02,160 Who are the Mythbusters? 24 00:01:03,160 --> 00:01:04,160 Adam Savage 25 00:01:04,160 --> 00:01:06,160 I reject your reality and substitute my own. 26 00:01:06,160 --> 00:01:07,160 And Jamie Heinemann 27 00:01:07,160 --> 00:01:09,160 We're gonna have an adventure. 28 00:01:09,160 --> 00:01:13,160 Between them more than 30 years of special effects experience, 29 00:01:13,160 --> 00:01:15,160 together with Tori Belachie 30 00:01:15,160 --> 00:01:17,160 Let's torch this thing! 31 00:01:17,160 --> 00:01:18,160 Grant Imahara 32 00:01:18,160 --> 00:01:19,160 Save yourselves! 33 00:01:19,160 --> 00:01:20,160 And Carrie Byron 34 00:01:20,160 --> 00:01:22,160 Best job ever! 35 00:01:23,160 --> 00:01:25,160 They don't just tell the myths, 36 00:01:26,160 --> 00:01:28,160 they put them to the top. 37 00:01:29,160 --> 00:01:30,160 Test. 38 00:01:36,160 --> 00:01:40,160 First up, Adam and Jamie get savvy with a movie myth. 39 00:01:42,160 --> 00:01:43,160 Great. Pirates again. 40 00:01:43,160 --> 00:01:44,160 Yes, pirates! 41 00:01:44,160 --> 00:01:46,160 What could be the matter with that? 42 00:01:46,160 --> 00:01:47,160 Well, what's the story? 43 00:01:47,160 --> 00:01:50,160 Alright, the story we're doing this time comes from Pirates of the Caribbean 2. 44 00:01:50,160 --> 00:01:52,160 There's this sequence in which our heroes 45 00:01:52,160 --> 00:01:54,160 are imprisoned in a cage, 46 00:01:54,160 --> 00:01:56,160 sort of like a hamster ball made of bones 47 00:01:56,160 --> 00:01:57,160 that's hanging in a ravine. 48 00:01:57,160 --> 00:01:58,160 It's quite similar to this toy, 49 00:01:58,160 --> 00:01:59,160 released in conjunction with the film. 50 00:01:59,160 --> 00:02:01,160 At any rate, they start using their body weight 51 00:02:01,160 --> 00:02:04,160 to swing this bone cage over to the side of the cliff 52 00:02:04,160 --> 00:02:06,160 and catch onto it, holding onto the vines. 53 00:02:06,160 --> 00:02:09,160 Then they're able to climb the cliff using the vines 54 00:02:09,160 --> 00:02:11,160 and engineer their escape. 55 00:02:11,160 --> 00:02:12,160 That's what we've gotta do. 56 00:02:12,160 --> 00:02:15,160 You're not gonna be using that pirate voice the whole time, are you? 57 00:02:15,160 --> 00:02:18,160 I don't have to, but I like to. 58 00:02:18,160 --> 00:02:20,160 Some of the time at least. 59 00:02:21,160 --> 00:02:23,160 By rattling their cage, 60 00:02:23,160 --> 00:02:26,160 this band of buccaneers swings to the cliff. 61 00:02:26,160 --> 00:02:29,160 But, do the filmic physics check out? 62 00:02:29,160 --> 00:02:32,160 Could you really create enough momentum to swing high 63 00:02:32,160 --> 00:02:35,160 and then peg-leg it up a precipice? 64 00:02:37,160 --> 00:02:38,160 So what's the plan? 65 00:02:38,160 --> 00:02:41,160 Well, everything about this story involves the bone cage, 66 00:02:41,160 --> 00:02:43,160 so I think we need to start there. 67 00:02:43,160 --> 00:02:45,160 And it's gotta be pretty strong, 68 00:02:45,160 --> 00:02:47,160 because in the movie it's holding up to six people 69 00:02:47,160 --> 00:02:48,160 and I think we should plan for that. 70 00:02:48,160 --> 00:02:50,160 And it's gotta be really light, 71 00:02:50,160 --> 00:02:52,160 because we're gonna have to haul it up a cliff. 72 00:02:52,160 --> 00:02:54,160 Exactly, and it should look like bones. 73 00:02:54,160 --> 00:02:55,160 I think we can achieve that. 74 00:02:55,160 --> 00:02:57,160 Let's go downstairs and build it. 75 00:02:57,160 --> 00:02:58,160 Alright. 76 00:02:58,160 --> 00:03:02,160 Ultimately, the mythbusters will be incarcerated inside a bone cage. 77 00:03:02,160 --> 00:03:04,160 Run, Xavi, I'm ready for testing! 78 00:03:04,160 --> 00:03:05,160 Whoa! 79 00:03:05,160 --> 00:03:08,160 But first, they've gotta create it. 80 00:03:09,160 --> 00:03:10,160 Ta-da! 81 00:03:10,160 --> 00:03:12,160 That is beautiful! 82 00:03:12,160 --> 00:03:13,160 105. 83 00:03:13,160 --> 00:03:14,160 Great. 84 00:03:14,160 --> 00:03:17,160 Eight struts are bent and welded together 85 00:03:17,160 --> 00:03:19,160 to form a giant pumpkin-like globe. 86 00:03:20,160 --> 00:03:22,160 This is our sphere, or at least it will be. 87 00:03:22,160 --> 00:03:24,160 And right now it's kind of flimsy, 88 00:03:24,160 --> 00:03:26,160 but by the time we're done with it, 89 00:03:26,160 --> 00:03:28,160 we're gonna triangulate all over the place 90 00:03:28,160 --> 00:03:31,160 and it'll be kind of like an organic geodesic dome, 91 00:03:31,160 --> 00:03:33,160 and it should be quite sturdy. 92 00:03:33,160 --> 00:03:35,160 Yep, the latticework of steel supports 93 00:03:35,160 --> 00:03:37,160 is welded into place to strengthen the ball. 94 00:03:37,160 --> 00:03:39,160 And although it looks simple, 95 00:03:39,160 --> 00:03:43,160 it's engineered to ensure that failure is not an option. 96 00:03:44,160 --> 00:03:46,160 We've gone with this construction method, 97 00:03:46,160 --> 00:03:48,160 the lightweight thin-walled steel tube 98 00:03:48,160 --> 00:03:49,160 and washers at every apex 99 00:03:49,160 --> 00:03:50,160 to make this thing super strong, 100 00:03:50,160 --> 00:03:53,160 because we're gonna hang six people in it. 101 00:03:53,160 --> 00:03:55,160 We also want it to be as light as possible. 102 00:03:55,160 --> 00:03:58,160 We've gotta try and walk it up the wall at the end. 103 00:03:58,160 --> 00:04:00,160 When I'm evil, overlord, 104 00:04:00,160 --> 00:04:03,160 I will certainly keep my prisoners in something just like this. 105 00:04:03,160 --> 00:04:04,160 And I think we've done it. 106 00:04:04,160 --> 00:04:06,160 But to make sure we're gonna hang it from the ceiling, 107 00:04:06,160 --> 00:04:09,160 Jamie and I are gonna get inside of it and see how we feel, 108 00:04:09,160 --> 00:04:10,160 we're also going to try and swing it 109 00:04:10,160 --> 00:04:12,160 and see if that's remotely possible. 110 00:04:12,160 --> 00:04:14,160 Like a steampunk Cinderella, 111 00:04:14,160 --> 00:04:17,160 Adam needs to test out his giant pumpkin 112 00:04:17,160 --> 00:04:19,160 before the pirate ball. 113 00:04:20,160 --> 00:04:21,160 Whoa! 114 00:04:21,160 --> 00:04:23,160 Oh, holy crap. 115 00:04:25,160 --> 00:04:27,160 Yeah, all right, come on in. 116 00:04:27,160 --> 00:04:29,160 This is a crucial proof of concept. 117 00:04:30,160 --> 00:04:33,160 Well, it certainly seems like it's supporting us. 118 00:04:33,160 --> 00:04:35,160 And it's so far so good. 119 00:04:35,160 --> 00:04:36,160 And back. 120 00:04:36,160 --> 00:04:38,160 So now, will it swing? 121 00:04:38,160 --> 00:04:39,160 Out. 122 00:04:39,160 --> 00:04:41,160 And back. 123 00:04:41,160 --> 00:04:42,160 And out. 124 00:04:42,160 --> 00:04:44,160 It's swinging. 125 00:04:44,160 --> 00:04:45,160 Yeah. 126 00:04:45,160 --> 00:04:46,160 Hey, it's working. 127 00:04:46,160 --> 00:04:48,160 Surprisingly, getting the cage to move 128 00:04:48,160 --> 00:04:50,160 appears to be child's play. 129 00:04:50,160 --> 00:04:53,160 This is like my dream jungle gym when I was 10 years old. 130 00:04:54,160 --> 00:04:55,160 And... 131 00:04:55,160 --> 00:04:58,160 But will it be this easy when they take it full scale? 132 00:04:58,160 --> 00:05:00,160 This isn't bad. 133 00:05:01,160 --> 00:05:04,160 Well, Jamie and I have run our bone cage through enough paces 134 00:05:04,160 --> 00:05:08,160 where we're really confident in it from a mechanical and safety standpoint. 135 00:05:08,160 --> 00:05:10,160 Now the only question is, 136 00:05:10,160 --> 00:05:11,160 it doesn't quite look like a bone cage. 137 00:05:11,160 --> 00:05:14,160 So now we're gonna do a little aestheticizing of it. 138 00:05:14,160 --> 00:05:16,160 Seems like we're spending a lot of time 139 00:05:16,160 --> 00:05:18,160 pulling tape off of rolls these days. 140 00:05:18,160 --> 00:05:20,160 And it's gonna give us some padding 141 00:05:20,160 --> 00:05:22,160 so we're not beating our hands against the steel. 142 00:05:22,160 --> 00:05:24,160 And once the cage is padded, 143 00:05:24,160 --> 00:05:26,160 it's time to bone up. 144 00:05:30,160 --> 00:05:34,160 The skulls and crossbones give it that cinematic cannibalistic feel. 145 00:05:34,160 --> 00:05:36,160 Yeah, man, that tells the story. 146 00:05:36,160 --> 00:05:37,160 Yeah. 147 00:05:37,160 --> 00:05:41,160 And before long, the cage is fit for a pirate. 148 00:05:41,160 --> 00:05:42,160 It's done? 149 00:05:42,160 --> 00:05:43,160 It's done. 150 00:05:43,160 --> 00:05:44,160 Can we get it out of here? 151 00:05:44,160 --> 00:05:45,160 Sure. 152 00:05:48,160 --> 00:05:53,160 Okay, so I've got a myth about oil drums, go-karts, and jet fuel. 153 00:05:53,160 --> 00:05:55,160 Gee, sounds like a recipe for disaster to me. 154 00:05:55,160 --> 00:05:56,160 Pretty much. 155 00:05:56,160 --> 00:05:59,160 Okay, this is a myth that comes from some of our European fans. 156 00:05:59,160 --> 00:06:03,160 Apparently this guy was watching a video about whoosh rockets on the Internet. 157 00:06:03,160 --> 00:06:07,160 Oh yeah, those are those things where instead of using water pressure for thrust, 158 00:06:07,160 --> 00:06:09,160 they use jet fuel, right? 159 00:06:09,160 --> 00:06:10,160 Oh! 160 00:06:10,160 --> 00:06:13,160 Yeah, well this guy was watching something like you described, 161 00:06:13,160 --> 00:06:16,160 but he decided he was gonna take it up a notch 162 00:06:16,160 --> 00:06:19,160 by using a 55 gallon oil drum, 163 00:06:19,160 --> 00:06:22,160 strapping it to a go-kart and adding jet fuel. 164 00:06:22,160 --> 00:06:23,160 And don't tell me. 165 00:06:23,160 --> 00:06:26,160 He jumps on, lights it, and goes for the ride of his life. 166 00:06:26,160 --> 00:06:27,160 At crazy speeds. 167 00:06:27,160 --> 00:06:30,160 Well, if this works, I say we all go for a ride, huh? 168 00:06:30,160 --> 00:06:31,160 Of course you do. 169 00:06:31,160 --> 00:06:34,160 The details of this urban life are on the internet. 170 00:06:34,160 --> 00:06:36,160 And the story of the day is that 171 00:06:36,160 --> 00:06:37,160 I'll go for a ride, huh? 172 00:06:37,160 --> 00:06:38,160 Of course you do. 173 00:06:38,160 --> 00:06:42,160 The details of this urban myth are surprisingly precise. 174 00:06:42,160 --> 00:06:47,160 Four gallons of methanol inside a 55 gallon drum plus a flame. 175 00:06:47,160 --> 00:06:49,160 And you'll get the rocket ride of your life. 176 00:06:49,160 --> 00:06:54,160 But is a great neck barrel run realistic, or is this all pot air? 177 00:06:54,160 --> 00:06:57,160 Alright, on the surface, this sounds pretty straight forward to test. 178 00:06:57,160 --> 00:07:00,160 We take a go-kart, strap a 55 gallon drum to it, fill it with fuel, 179 00:07:00,160 --> 00:07:02,160 jump on it, light it, and go. 180 00:07:02,160 --> 00:07:04,160 Or we don't jump on it. 181 00:07:04,160 --> 00:07:07,160 We light it remotely and we stand really far back. 182 00:07:07,160 --> 00:07:08,160 Yeah, that's probably safer. 183 00:07:08,160 --> 00:07:13,160 Now, it's not all that outlandish to think that someone would super size this concept 184 00:07:13,160 --> 00:07:15,160 into a full-size barrel. 185 00:07:15,160 --> 00:07:18,160 Because the whoosh rocket is a fairly common science demonstration. 186 00:07:18,160 --> 00:07:19,160 Let me show you. 187 00:07:19,160 --> 00:07:26,160 Take your methanol, agitate, and ignite. 188 00:07:26,160 --> 00:07:28,160 Just like that. 189 00:07:28,160 --> 00:07:31,160 What happens is that you ignite the vapor inside the bottle. 190 00:07:31,160 --> 00:07:34,160 Those expanding gases push out of the nozzle. 191 00:07:34,160 --> 00:07:38,160 That creates thrust and it sends you right across the parking lot. 192 00:07:40,160 --> 00:07:43,160 But the question is, if you super size those ingredients, 193 00:07:43,160 --> 00:07:47,160 will you get the crazy speeds of the myth? 194 00:07:47,160 --> 00:07:50,160 Okay, yeah, it rolls. This will work. 195 00:07:50,160 --> 00:07:51,160 This will be awesome. 196 00:07:51,160 --> 00:07:55,160 To get the drum rolling, it's off to location. 197 00:07:55,160 --> 00:07:58,160 A jet go-kart with methanol. 198 00:07:58,160 --> 00:08:00,160 I love it. 199 00:08:01,160 --> 00:08:04,160 We've come out to the Alameda County Sheriff's Bomb Range. 200 00:08:04,160 --> 00:08:07,160 So we can test our methanol go-kart. 201 00:08:07,160 --> 00:08:10,160 Which basically requires a 55 gallon drum. 202 00:08:10,160 --> 00:08:12,160 Oh, eee. 203 00:08:12,160 --> 00:08:13,160 So it rolls. 204 00:08:13,160 --> 00:08:19,160 Fashioned like a go-kart and powered with four gallons of methanol as per the myth. 205 00:08:19,160 --> 00:08:22,160 I'm really curious to see if this is going to shoot down the road 206 00:08:22,160 --> 00:08:25,160 or possibly just blow up into a million pieces. 207 00:08:25,160 --> 00:08:27,160 Don't worry, this ain't going to hurt a bit. 208 00:08:27,160 --> 00:08:30,160 With a risk-taking rider strapped on, 209 00:08:30,160 --> 00:08:33,160 it's time to add the mythical methanol to the mix. 210 00:08:34,160 --> 00:08:36,160 Alright, that's four gallons. 211 00:08:36,160 --> 00:08:38,160 Let's agitate it a little bit. 212 00:08:38,160 --> 00:08:41,160 Just like the mini-wush rocket, the fuel needs a notch. 213 00:08:41,160 --> 00:08:43,160 Looks like you've done this before. 214 00:08:43,160 --> 00:08:45,160 Agitate? Yes. 215 00:08:45,160 --> 00:08:48,160 To create a potentially explosive mix through the air. 216 00:08:48,160 --> 00:08:49,160 Cool. 217 00:08:49,160 --> 00:08:52,160 Finally, Grant fits a flare to a remote control car 218 00:08:52,160 --> 00:08:56,160 to trigger ignition and possibly send the barrel rocketing. 219 00:08:57,160 --> 00:08:59,160 Alright, here we go. 220 00:08:59,160 --> 00:09:01,160 This is barrel go-kart. 221 00:09:01,160 --> 00:09:03,160 In three, two, one. 222 00:09:08,160 --> 00:09:09,160 We have achieved the hole. 223 00:09:09,160 --> 00:09:11,160 The fire is in the hole. 224 00:09:11,160 --> 00:09:13,160 Doesn't it look like it's going in the hole? 225 00:09:13,160 --> 00:09:15,160 Yeah, like a ignition. 226 00:09:15,160 --> 00:09:17,160 Fire in the hole! 227 00:09:17,160 --> 00:09:19,160 I think it's in the hole there. 228 00:09:19,160 --> 00:09:20,160 Yeah. 229 00:09:20,160 --> 00:09:21,160 Yeah. 230 00:09:21,160 --> 00:09:25,160 Unlike the myth, the flare doesn't ignite the fuel and the cart goes nowhere. 231 00:09:25,160 --> 00:09:28,160 That was anticlimactic. 232 00:09:28,160 --> 00:09:30,160 Anticlimactic is an understatement. 233 00:09:30,160 --> 00:09:32,160 The car may be on fire. 234 00:09:32,160 --> 00:09:34,160 But if at first you don't succeed... 235 00:09:34,160 --> 00:09:39,160 Maybe the guy in the myth just got lucky and had the right air to fuel ratio 236 00:09:39,160 --> 00:09:42,160 so that way when he did introduce the flame, it took off flying. 237 00:09:42,160 --> 00:09:43,160 There you go. 238 00:09:43,160 --> 00:09:44,160 So we're going to reset this time. 239 00:09:44,160 --> 00:09:46,160 We're going to agitate the barrel a little bit longer 240 00:09:46,160 --> 00:09:49,160 and we're going to put the flare inside the barrel. 241 00:09:49,160 --> 00:09:51,160 It gives a whole new me fire in the hole, doesn't it? 242 00:09:51,160 --> 00:09:54,160 Hopefully this time we'll get enough thrust 243 00:09:54,160 --> 00:09:56,160 and this thing gets fired up. 244 00:09:56,160 --> 00:10:00,160 In theory, more agitation should mean a more explosive mix of fuel and air. 245 00:10:00,160 --> 00:10:03,160 But will it get them a rocket barrel? 246 00:10:03,160 --> 00:10:07,160 Fire in the hole in three, two, one... 247 00:10:07,160 --> 00:10:09,160 Hey! 248 00:10:09,160 --> 00:10:11,160 There's a little bit of air still! 249 00:10:11,160 --> 00:10:13,160 It's still going! 250 00:10:13,160 --> 00:10:15,160 It's still going! 251 00:10:15,160 --> 00:10:20,160 Push the barrel out and it actually ran up the road a little. 252 00:10:20,160 --> 00:10:23,160 It's not going to beat any land speed records. 253 00:10:23,160 --> 00:10:27,160 But the team has not even scraped the bottom of this ballistic barrel. 254 00:10:27,160 --> 00:10:29,160 You know what I'd like to see now? 255 00:10:29,160 --> 00:10:33,160 I think we should take this to small scale and find out if we have the perfect amount of fuel, 256 00:10:33,160 --> 00:10:36,160 maybe less, maybe more, if we can actually get enough thrust to make the go-kart go. 257 00:10:36,160 --> 00:10:39,160 Alright, so back to the shop, back to the shop. 258 00:10:39,160 --> 00:10:40,160 Coming up... 259 00:10:40,160 --> 00:10:42,160 We got a boat tank full of pirates! 260 00:10:42,160 --> 00:10:45,160 We're going to do some scientific experiments on them. 261 00:10:45,160 --> 00:10:48,160 And later... 262 00:10:48,160 --> 00:10:52,160 This thing is going to be insane. 263 00:10:54,160 --> 00:11:01,160 At the end of their road, six scurvy dogs sway themselves to freedom. 264 00:11:01,160 --> 00:11:05,160 But is this daring, filmic feat a swing and a myth? 265 00:11:05,160 --> 00:11:09,160 To find out, Adam and Jamie have picked their bones. 266 00:11:09,160 --> 00:11:11,160 So now to get them suspended. 267 00:11:11,160 --> 00:11:14,160 If we're going to test this ball of bones swing from the Pirates of the Caribbean, 268 00:11:14,160 --> 00:11:16,160 we're going to need a big cliff. 269 00:11:16,160 --> 00:11:18,160 Found one! 270 00:11:18,160 --> 00:11:20,160 That ought to do. 271 00:11:20,160 --> 00:11:23,160 I'm standing in the fire training tower of the Santa Rosa Fire Department. 272 00:11:23,160 --> 00:11:27,160 This is a building they repeatedly set on fire and then put out. 273 00:11:27,160 --> 00:11:35,160 It's 75 feet tall and it makes a perfect, configurable cliff face for our swinging bone cage experiments. 274 00:11:35,160 --> 00:11:36,160 What's next? 275 00:11:36,160 --> 00:11:38,160 Well, this is about pirates, isn't it? 276 00:11:38,160 --> 00:11:39,160 Yeah. 277 00:11:39,160 --> 00:11:41,160 I don't see any pirate costume. 278 00:11:41,160 --> 00:11:43,160 Oh, you little faith. 279 00:11:43,160 --> 00:11:45,160 Give me a second. 280 00:11:45,160 --> 00:11:48,160 Alright, Jamie, I'm ready for testing. 281 00:11:48,160 --> 00:11:50,160 What, no gold teeth? 282 00:11:50,160 --> 00:11:52,160 Oh, crap, I forgot about that part. 283 00:11:52,160 --> 00:11:54,160 Right, let's get in! 284 00:11:54,160 --> 00:11:55,160 Okay. 285 00:11:55,160 --> 00:11:59,160 Well, you want to try your swing thing like we did in the shop with just our legs dangling through? 286 00:11:59,160 --> 00:12:00,160 Yeah. 287 00:12:00,160 --> 00:12:01,160 Alright. 288 00:12:01,160 --> 00:12:02,160 Ready? 289 00:12:02,160 --> 00:12:03,160 Yeah. 290 00:12:03,160 --> 00:12:04,160 Okay. 291 00:12:04,160 --> 00:12:07,160 Freshly imprisoned, the scurvy dogs try to strike up some momentum. 292 00:12:07,160 --> 00:12:12,160 This is without a doubt the strangest dance we've ever done. 293 00:12:12,160 --> 00:12:17,160 By moving back and forth, they should create enough push to get to the wall. 294 00:12:17,160 --> 00:12:18,160 Come on. 295 00:12:18,160 --> 00:12:20,160 Come on. 296 00:12:20,160 --> 00:12:23,160 But unlike their success in the shop, they're not budging. 297 00:12:23,160 --> 00:12:25,160 I have an idea. 298 00:12:25,160 --> 00:12:28,160 So they change tactics to the standing swing. 299 00:12:28,160 --> 00:12:29,160 Whoa! 300 00:12:29,160 --> 00:12:33,160 Oh, I almost lost me at. 301 00:12:33,160 --> 00:12:35,160 That would have been ugly. 302 00:12:35,160 --> 00:12:37,160 Grab my arm like this. 303 00:12:37,160 --> 00:12:43,160 Now, what if I went like this and then you came like that and let go over there? 304 00:12:43,160 --> 00:12:49,160 In theory, to get the bone cage swinging, Adam and Jamie need to raise and lower the center 305 00:12:49,160 --> 00:12:52,160 of gravity of the ball by using their own mask. 306 00:12:52,160 --> 00:12:53,160 Come on. 307 00:12:53,160 --> 00:12:57,160 We don't seem to be moving at all. 308 00:12:57,160 --> 00:12:59,160 We're pushing in the right direction. 309 00:12:59,160 --> 00:13:01,160 This is not work. 310 00:13:01,160 --> 00:13:07,160 However, so far, no matter how they throw their weight around, it's not enough to get a significant swing. 311 00:13:07,160 --> 00:13:10,160 Adam even tries thinking outside the cage. 312 00:13:10,160 --> 00:13:12,160 That's more promising. 313 00:13:13,160 --> 00:13:16,160 But cheating still doesn't get the ball right. 314 00:13:16,160 --> 00:13:18,160 I'm not sure, Jamie. 315 00:13:18,160 --> 00:13:22,160 We seem to have a lot more luck in the shop than we are here, and I thought it would be easier on the longer arm. 316 00:13:22,160 --> 00:13:25,160 Yeah, it seems like it might actually be harder. 317 00:13:25,160 --> 00:13:26,160 It does. 318 00:13:26,160 --> 00:13:29,160 And the lack of swing isn't the only problem. 319 00:13:29,160 --> 00:13:31,160 I think I'm going to throw up. 320 00:13:31,160 --> 00:13:32,160 Uh-oh. 321 00:13:32,160 --> 00:13:35,160 I'm having a kind of a powerful, nauseous reaction. 322 00:13:35,160 --> 00:13:36,160 Well, why don't you hop out? 323 00:13:36,160 --> 00:13:37,160 Yeah. 324 00:13:37,160 --> 00:13:43,160 With Adam benched from ball cage duty, it's over to Jamie to swing solo. 325 00:13:43,160 --> 00:13:45,160 Well, Adam threw in the towel. 326 00:13:45,160 --> 00:13:48,160 He got a little seasick, I guess. 327 00:13:48,160 --> 00:13:52,160 So I'm going to see if I can do anything by myself. 328 00:13:52,160 --> 00:13:57,160 The idea being that if you remove the variables, maybe you can figure out what actually makes this thing work. 329 00:13:57,160 --> 00:14:01,160 Adam being a variable, which he usually is. 330 00:14:01,160 --> 00:14:08,160 And although Jamie experiments with a variety of techniques, the problem remains the same. 331 00:14:08,160 --> 00:14:15,160 I don't seem to be having a lot of luck getting this thing to swing from a dead stop, but then it weighs more than I do. 332 00:14:15,160 --> 00:14:20,160 So maybe the problem is that there's not enough mass moving around to dominate what it does. 333 00:14:20,160 --> 00:14:27,160 In the movie, after all, they had a number of people doing this, and so maybe that's what we need to do. 334 00:14:27,160 --> 00:14:32,160 Maybe because although the dimensions match the movie, their mass doesn't. 335 00:14:32,160 --> 00:14:33,160 What's next? 336 00:14:33,160 --> 00:14:35,160 Next is more bodies. 337 00:14:35,160 --> 00:14:39,160 More bodies! More bodies! 338 00:14:42,160 --> 00:14:53,160 Inspired by the Internet, supposedly this drum daredevil filled his barrel go-kart with fuel, lit a match, and took off at incredible speeds. 339 00:14:53,160 --> 00:14:57,160 But so far, getting that rocket-powered rush... 340 00:14:57,160 --> 00:14:59,160 That's kind of anticlimactic. 341 00:14:59,160 --> 00:15:02,160 ...hasn't been that easy. 342 00:15:02,160 --> 00:15:11,160 So the mythbusters have come back to the shop to replicate the barrel rodeo in small scale and test the parameters one by one. 343 00:15:11,160 --> 00:15:12,160 Yee-haw! 344 00:15:12,160 --> 00:15:16,160 Starting with fuel, how much methanol gets optimal thrust? 345 00:15:16,160 --> 00:15:18,160 Let's agitate it a little bit. 346 00:15:18,160 --> 00:15:22,160 First off, they're trying the same ratio as the myth, 7%. 347 00:15:22,160 --> 00:15:24,160 Fully agitated. 348 00:15:24,160 --> 00:15:25,160 Here we go. 349 00:15:25,160 --> 00:15:27,160 In three, two, one... 350 00:15:29,160 --> 00:15:30,160 Yee-haw! 351 00:15:30,160 --> 00:15:31,160 We got some thrust! 352 00:15:32,160 --> 00:15:39,160 Just like the range test, 7% didn't send the cart far, but will having the fuel change that. 353 00:15:39,160 --> 00:15:43,160 Alright, 3.5%. Here we go in three, two, one... 354 00:15:45,160 --> 00:15:46,160 Ooh! 355 00:15:46,160 --> 00:15:47,160 We got about the same. 356 00:15:47,160 --> 00:15:48,160 Yeah, not much difference. 357 00:15:49,160 --> 00:15:55,160 3.5% gives them the same result, so they take the fuel ratio all the way down. 358 00:15:55,160 --> 00:16:01,160 Now in the past, when we've used gases to create some sort of thrust like propane rocket, 359 00:16:01,160 --> 00:16:06,160 we found that once we got down to just fumes and used just a little bit of fuel, 360 00:16:06,160 --> 00:16:08,160 we actually got a lot of thrust. 361 00:16:08,160 --> 00:16:15,160 So I expect the less fuel we use, the more fumes, and we're actually going to see this rocket shoot down the track. 362 00:16:15,160 --> 00:16:17,160 In three, two, one... 363 00:16:19,160 --> 00:16:20,160 Oh! 364 00:16:20,160 --> 00:16:25,160 Alright, well, it went about two feet, so we got some thrust. 365 00:16:25,160 --> 00:16:29,160 The good news is that less than 1% doubled the thrust. 366 00:16:29,160 --> 00:16:33,160 The bad news is that it was still more of a putter than a projectile. 367 00:16:33,160 --> 00:16:38,160 No matter what kind of air to fuel ratio we're coming up with, this thing is not rocketing like the myth talks about. 368 00:16:38,160 --> 00:16:44,160 I don't really want to stop here. I want to see a rocket go-kart. I mean, can't we make some modifications? 369 00:16:44,160 --> 00:16:46,160 Let's try some stuff and see what happens. 370 00:16:46,160 --> 00:16:47,160 I like it. 371 00:16:47,160 --> 00:16:55,160 Although the myth clearly states that the barrel was unmodified, to give this rocket a fighting chance, it's time to bend the rules. 372 00:16:55,160 --> 00:17:00,160 And bend number one is to transform the liquid fuel into that flammable fuel vapor. 373 00:17:00,160 --> 00:17:04,160 We're going to try a new technique of agitating the methanol using air. 374 00:17:04,160 --> 00:17:09,160 Now that's going to do two things. It's going to introduce more oxygen and it's going to create more fumes. 375 00:17:09,160 --> 00:17:12,160 Hopefully that combination will give us more thrust. 376 00:17:12,160 --> 00:17:16,160 But that's not the only modification the guys have in mind. 377 00:17:16,160 --> 00:17:21,160 We're going to add a nozzle. This should accelerate the escaping gases and give us more thrust. 378 00:17:21,160 --> 00:17:27,160 With a built-in agitator and thrust focusing nozzle, will this mini barrel go ballistic? 379 00:17:27,160 --> 00:17:29,160 Alright, here we go. Bubbling up. 380 00:17:30,160 --> 00:17:33,160 At 5 psi. 381 00:17:35,160 --> 00:17:36,160 Hit it again! 382 00:17:37,160 --> 00:17:39,160 Yeah, that nozzle's great. 383 00:17:39,160 --> 00:17:42,160 It's a thrust in the right direction for the barrel. 384 00:17:43,160 --> 00:17:46,160 The modifications triple the distance. 385 00:17:48,160 --> 00:17:55,160 The only problem is after making it down the track in three blasts, it sets everything on fire. 386 00:18:03,160 --> 00:18:07,160 Luckily the safety officer is on hand to defuse the situation. 387 00:18:08,160 --> 00:18:10,160 Well that was exciting. 388 00:18:12,160 --> 00:18:17,160 That thing could have kept going if the track hadn't caught on fire and everything got really dangerous. 389 00:18:17,160 --> 00:18:20,160 Dangerous? Yes, but also a good start. 390 00:18:20,160 --> 00:18:25,160 So now the team can focus on making their mods safer and more efficient. 391 00:18:25,160 --> 00:18:32,160 Now my theory is that we're losing a lot of energy as the expanding gases have to turn this height corner and then come out of the nozzle. 392 00:18:32,160 --> 00:18:37,160 So what I'm going to try is to make a funnel shape and relocate the bunghole to the center. 393 00:18:37,160 --> 00:18:43,160 That way the gases can expand, smoothly accelerate and then come out the nozzle for even more thrust. 394 00:18:43,160 --> 00:18:50,160 And while Grant is working on a more efficient nozzle, Tori's injecting some oomph into the fuel injection. 395 00:18:50,160 --> 00:18:53,160 This is what's going to be going on inside the barrel. 396 00:18:53,160 --> 00:18:58,160 Now originally we had the fuel in the bottom of the barrel and we pumped air through it creating vapors. 397 00:18:58,160 --> 00:19:04,160 But I thought it would be kind of cool if we introduced the fuel through an auto body spray gun. 398 00:19:04,160 --> 00:19:09,160 That way we're getting air and we're atomizing the methanol making it much easier to ignite. 399 00:19:09,160 --> 00:19:14,160 After optimizing the design, the barrel go-kart is rolled out once again. 400 00:19:14,160 --> 00:19:22,160 Okay, this is longer nozzle with aerated fuel and cone. Here we go, 3, 2, 1. 401 00:19:23,160 --> 00:19:26,160 Oh! Yeah! 402 00:19:28,160 --> 00:19:35,160 Amazingly the combination of nozzle and aerated fuel propels the barrel 15 feet down the track. 403 00:19:35,160 --> 00:19:39,160 We got some serious distance. I think it's time we take this full scale. 404 00:19:39,160 --> 00:19:41,160 Yeah, I think that is the winning combo. 405 00:19:41,160 --> 00:19:45,160 Oh yeah, we got the long nozzle, the aeration, the crazy cone shape. 406 00:19:45,160 --> 00:19:47,160 This is going to be so cool. We get a larger scale. 407 00:19:47,160 --> 00:19:49,160 I think this is going to work. 408 00:19:49,160 --> 00:19:52,160 How are we going to stop it? That's the question. 409 00:19:52,160 --> 00:20:00,160 After a lot of testing and several new improvements, we've gone from our simple barrel go-kart to this crazy thing here. 410 00:20:00,160 --> 00:20:10,160 We actually added a nozzle, a cone shape and an aeration system for the fuel so that we can propel this little dude down the track 15 times the length of our go-kart. 411 00:20:10,160 --> 00:20:15,160 I think when we take this to full scale we've got a really good chance it's a really sick thrust. 412 00:20:20,160 --> 00:20:29,160 Swing it. It's so easy even a dog can do it. 413 00:20:29,160 --> 00:20:31,160 Come on. 414 00:20:31,160 --> 00:20:34,160 But that's not the case for our scurvy dogs. 415 00:20:34,160 --> 00:20:36,160 I think I'm going to throw up. 416 00:20:36,160 --> 00:20:40,160 Which is why the mythbusters have drafted some help into service. 417 00:20:41,160 --> 00:20:47,160 Well, we've assembled a new crew to escape from the bow tags. 418 00:20:47,160 --> 00:20:52,160 They've got over 53 years of circus experience among them. 419 00:20:52,160 --> 00:20:58,160 The life, the limbo, the scurvy dogs and they're ready to help us get swinging. 420 00:20:58,160 --> 00:21:02,160 Earlier, Adam and Jamie were a few-mate short of a 34-foot swing. 421 00:21:02,160 --> 00:21:04,160 Come on up and try it after size. 422 00:21:04,160 --> 00:21:11,160 But now with four trapeze professionals and two mythbusters, they've got the six-man crew of the film. 423 00:21:11,160 --> 00:21:14,160 The pirate posse start with the movie method. 424 00:21:14,160 --> 00:21:15,160 Go. 425 00:21:15,160 --> 00:21:16,160 You all right? 426 00:21:16,160 --> 00:21:18,160 Yep. I got knee pads. 427 00:21:18,160 --> 00:21:21,160 But that technique doesn't seem to have legs. 428 00:21:21,160 --> 00:21:22,160 You okay? 429 00:21:22,160 --> 00:21:23,160 Yep. 430 00:21:23,160 --> 00:21:24,160 All right. 431 00:21:24,160 --> 00:21:26,160 Ready? One more time. Let's go back. 432 00:21:26,160 --> 00:21:27,160 Go up. 433 00:21:27,160 --> 00:21:28,160 All right. 434 00:21:28,160 --> 00:21:29,160 All right. 435 00:21:29,160 --> 00:21:33,160 So the movie technique of running from side to side is totally not working here. 436 00:21:33,160 --> 00:21:37,160 First of all, we can't do it in unison and we keep falling through the holes. 437 00:21:37,160 --> 00:21:40,160 So it's not very safe and not very effective. 438 00:21:40,160 --> 00:21:43,160 But we do know that in order to get this thing moving, 439 00:21:43,160 --> 00:21:46,160 we need to concentrate our efforts on changing the center of mass. 440 00:21:46,160 --> 00:21:52,160 Like a kid on a swing, we need to raise the center on the upswing and lower it on the downswing. 441 00:21:52,160 --> 00:21:57,160 That way, we might just be able to build the momentum we need to get the distance we want. 442 00:21:57,160 --> 00:21:58,160 Yep. 443 00:21:58,160 --> 00:22:02,160 And to get to grips with that center of mass, they enlist a tie strap. 444 00:22:02,160 --> 00:22:03,160 Push. 445 00:22:03,160 --> 00:22:04,160 Yeah. 446 00:22:04,160 --> 00:22:08,160 Creating a coordinated rhythm, either side of the center of gravity. 447 00:22:08,160 --> 00:22:09,160 Hey. 448 00:22:09,160 --> 00:22:11,160 That seems to get them swinging. 449 00:22:11,160 --> 00:22:12,160 Weed. 450 00:22:12,160 --> 00:22:14,160 Where does it work out ever? 451 00:22:14,160 --> 00:22:15,160 Push in his. 452 00:22:15,160 --> 00:22:16,160 Push. 453 00:22:16,160 --> 00:22:23,160 But after over 40 minutes of the old Eve hoe, they're nowhere near the cliff. 454 00:22:23,160 --> 00:22:26,160 At this point, we've had some success, but eventually we lose the battle. 455 00:22:27,160 --> 00:22:34,160 The cable and the sphere seem to be absorbing all of our energy into flexing and twisting 456 00:22:34,160 --> 00:22:40,160 and bobbing around instead of letting us focus it in one specific direction for the swing. 457 00:22:40,160 --> 00:22:44,160 So the only thing that we can think of to do is to shorten the cable. 458 00:22:44,160 --> 00:22:46,160 Hopefully that'll get us where we want to go. 459 00:22:46,160 --> 00:22:52,160 Shortening the cable makes the change to the center of gravity in comparison to the length larger 460 00:22:52,160 --> 00:22:54,160 and should amplify the swing. 461 00:22:54,160 --> 00:22:55,160 But will it be enough? 462 00:22:55,160 --> 00:22:56,160 Right. 463 00:22:56,160 --> 00:22:57,160 Short of cable. 464 00:22:57,160 --> 00:22:58,160 See if it swings. 465 00:22:58,160 --> 00:22:59,160 Push it. 466 00:22:59,160 --> 00:23:00,160 Push it. 467 00:23:00,160 --> 00:23:01,160 Push it. 468 00:23:01,160 --> 00:23:04,160 Initially, it seems that building up power is easier. 469 00:23:04,160 --> 00:23:05,160 Push. 470 00:23:05,160 --> 00:23:07,160 Oh, it seems to be working. 471 00:23:07,160 --> 00:23:08,160 Yeah. 472 00:23:08,160 --> 00:23:09,160 Then. 473 00:23:09,160 --> 00:23:10,160 That's it. 474 00:23:10,160 --> 00:23:11,160 You scurry dog swing. 475 00:23:11,160 --> 00:23:12,160 Then. 476 00:23:12,160 --> 00:23:18,160 But after another hour of effort, it's clear that they are sustaining rather than gaining 477 00:23:18,160 --> 00:23:19,160 momentum. 478 00:23:19,160 --> 00:23:20,160 Any higher? 479 00:23:20,160 --> 00:23:21,160 No. 480 00:23:21,160 --> 00:23:24,160 Guys, that was a fantastic effort. 481 00:23:24,160 --> 00:23:26,660 I feel like we're just not going to get that thing swinging. 482 00:23:26,660 --> 00:23:30,160 So it's just not your average strappy swing with this big, heavy cage to try to move it. 483 00:23:30,160 --> 00:23:31,160 It's just not possible. 484 00:23:31,160 --> 00:23:33,160 Yeah, and it's not going to get any lighter than that. 485 00:23:33,160 --> 00:23:34,160 No. 486 00:23:34,160 --> 00:23:37,160 If we can't make it work with these guys, we can't make it work. 487 00:23:37,160 --> 00:23:41,160 I think it's safe to say that swinging a bone cage with six people from inside is busted. 488 00:23:41,160 --> 00:23:42,160 It's busted. 489 00:23:42,160 --> 00:23:43,160 Busted. 490 00:23:43,160 --> 00:23:44,160 Busted. 491 00:23:44,160 --> 00:23:53,160 But there's still more pirate pandemonium to come. 492 00:23:53,160 --> 00:23:58,160 Everyone knows things are better when they're turbocharged. 493 00:23:58,160 --> 00:24:00,160 Three, two, one. 494 00:24:00,160 --> 00:24:05,160 But the Mythbusters first ballistic barrel was anything but. 495 00:24:05,160 --> 00:24:07,160 And nothing's happening. 496 00:24:07,160 --> 00:24:14,320 However, after a few small scale modifications, they've upped the thrust and they're ready 497 00:24:14,320 --> 00:24:17,160 to take this myth full scale. 498 00:24:17,160 --> 00:24:22,160 So now with our modifications and small scale, we've gotten our go-kart to rocket across 499 00:24:22,160 --> 00:24:23,160 the shop. 500 00:24:23,160 --> 00:24:28,160 But our design has evolved from a whoosh rocket into what's called a pulse jet. 501 00:24:28,160 --> 00:24:33,160 We know that a whoosh rocket ignites fuel in a chamber and the gases expand to create 502 00:24:33,160 --> 00:24:34,160 thrust. 503 00:24:34,160 --> 00:24:37,160 But after one big burst, it's pretty much over. 504 00:24:37,160 --> 00:24:41,160 The difference with the pulse jet is that the thrust is continuous. 505 00:24:41,160 --> 00:24:45,160 The escaping gases create an air of low pressure inside the chamber. 506 00:24:45,160 --> 00:24:50,160 Air is then sucked in to build a gap and starts to combustion again so that the cycle of thrust 507 00:24:50,160 --> 00:24:54,160 will repeat as long as there's fuel in a source of ignition. 508 00:24:54,160 --> 00:24:59,160 Indeed, but to supersize their pulse jet go-kart, there's a lot to do, starting with 509 00:24:59,160 --> 00:25:01,160 portable fuel injection. 510 00:25:01,160 --> 00:25:04,160 Now for this to work, we need constant air entering the barrel. 511 00:25:04,160 --> 00:25:08,160 So to make it portable, I'm going to use a scuba tank. 512 00:25:08,160 --> 00:25:11,160 The air pressure coming out of here is 3000 psi. 513 00:25:11,160 --> 00:25:17,160 I need to get it down to 100 psi so that it actually pump fuel through our spray gun. 514 00:25:17,160 --> 00:25:21,160 So what I'm going to do is take this old regulator, put it through this regulator, 515 00:25:21,160 --> 00:25:26,160 and hopefully get it down to a safe enough pressure so we get the fuel injection into the barrel 516 00:25:26,160 --> 00:25:28,160 and this thing gets fired up. 517 00:25:28,160 --> 00:25:31,160 We're about to go diving into science. 518 00:25:31,160 --> 00:25:36,160 Come along for the journey. 519 00:25:36,160 --> 00:25:38,160 We have portable air. 520 00:25:38,160 --> 00:25:44,160 With the fuel injection invention sorted, Cary gets on a roll with the go-kart. 521 00:25:44,160 --> 00:25:46,160 I'm designing the cart. 522 00:25:46,160 --> 00:25:50,160 Now I want this to roll really, really easily so that all the thrusts make it shoot down the runway. 523 00:25:50,160 --> 00:25:54,160 To do that, I'm going to use tires from a bicycle. 524 00:25:54,160 --> 00:25:58,160 I figured that has a low rolling resistance and it will be a lot easier to just push it. 525 00:25:58,160 --> 00:26:02,160 Now I also want to make the cart really lightweight so I'm going to use a minimal amount of material 526 00:26:02,160 --> 00:26:07,160 to try to create a cart that actually will have no problem turning into a rocket. 527 00:26:07,160 --> 00:26:13,160 Cary's streamlined the design, but the main element of turning the go-kart rocket is the back end. 528 00:26:13,160 --> 00:26:16,160 And given the success of the cone of the longer nozzle and small scale, 529 00:26:16,160 --> 00:26:20,160 we're going to do exactly the same thing in large scale. 530 00:26:20,160 --> 00:26:23,160 Looks like a doughnut now, but soon it'll be a cone. 531 00:26:23,160 --> 00:26:29,160 And while Grant gets bent out of shape, Torry creates the nozzle. 532 00:26:29,160 --> 00:26:32,160 That's one big nozzle. 533 00:26:32,160 --> 00:26:38,160 With the nozzle and cone complete and the barrel on board, Cary decides to add a little personality. 534 00:26:44,160 --> 00:26:46,160 Demon dog. 535 00:26:48,160 --> 00:26:51,160 Drumroll, please. 536 00:26:51,160 --> 00:26:57,160 Meet the rolling drum rocket or the Mythbusters pulse jet go-kart. 537 00:26:57,160 --> 00:26:59,160 Oh my god, that is insanity. 538 00:26:59,160 --> 00:27:01,160 You know one thing we forgot? 539 00:27:01,160 --> 00:27:02,160 What? 540 00:27:02,160 --> 00:27:03,160 Brakes. 541 00:27:03,160 --> 00:27:05,160 Where we're going, we don't need brakes. 542 00:27:05,160 --> 00:27:06,160 Coming up on Mythbusters! 543 00:27:06,160 --> 00:27:08,160 Can you make a go-kart out of a barrel? 544 00:27:08,160 --> 00:27:11,160 You're not going to want to miss this! 545 00:27:14,160 --> 00:27:20,160 At Alameda, the team has arrived locked stock and pulse jet barrel. 546 00:27:20,160 --> 00:27:23,160 You know, after that first test, I really didn't think this had much promise, 547 00:27:23,160 --> 00:27:26,160 but after building this thing, I cannot wait to see what it does. 548 00:27:26,160 --> 00:27:29,160 Oh come on, this is Mythbusters. You knew how this was going to end. 549 00:27:29,160 --> 00:27:32,160 It's either going to explode or it's going to zoom down the runway. 550 00:27:32,160 --> 00:27:35,160 That's the plan and the team is feeling optimistic. 551 00:27:35,160 --> 00:27:39,160 After going through our small scale tests, coming up with modifications to give us more thrust, 552 00:27:39,160 --> 00:27:43,160 and then finally getting to this stage where we have this crazy vehicle, 553 00:27:43,160 --> 00:27:47,160 I think we have a very good chance of replicating the results today. 554 00:27:47,160 --> 00:27:50,160 Just like last time, the kart gets an uneasy rider. 555 00:27:50,160 --> 00:27:54,160 Those eyes are creeping me out. I'm going to make them look a little scary. 556 00:27:57,160 --> 00:27:58,160 Nice touch. 557 00:27:58,160 --> 00:28:01,160 Oh, that's perfect because it wasn't weird enough. 558 00:28:02,160 --> 00:28:05,160 With the rider on board and the fuel fueled. 559 00:28:05,160 --> 00:28:07,160 Alright, let's light them up. 560 00:28:07,160 --> 00:28:10,160 Tori takes care of their sophisticated ignition system. 561 00:28:10,160 --> 00:28:11,160 Right! 562 00:28:11,160 --> 00:28:14,160 Lighting the blow torch and running for it. 563 00:28:14,160 --> 00:28:15,160 Yeah! 564 00:28:15,160 --> 00:28:16,160 Here we go. 565 00:28:16,160 --> 00:28:17,160 Fire it! 566 00:28:17,160 --> 00:28:18,160 One, two, one. 567 00:28:18,160 --> 00:28:19,160 Yeah! 568 00:28:20,160 --> 00:28:21,160 Hey! 569 00:28:21,160 --> 00:28:23,160 We got some thrust! 570 00:28:23,160 --> 00:28:24,160 Look at that! 571 00:28:24,160 --> 00:28:26,160 Yeah, it's working! 572 00:28:27,160 --> 00:28:29,160 Do you think it'll just keep adding speed in that speed? 573 00:28:29,160 --> 00:28:31,160 It's starting to pick up speed. 574 00:28:31,160 --> 00:28:32,160 Come on! 575 00:28:33,160 --> 00:28:34,160 Yeah! 576 00:28:35,160 --> 00:28:38,160 Alright, it's not the fastest vehicle in the world, but it's working. 577 00:28:38,160 --> 00:28:39,160 That's not bad! 578 00:28:39,160 --> 00:28:41,160 It's getting it down the runway. 579 00:28:43,160 --> 00:28:47,160 The pulse jet is pulsing, but it's not the maximum thrust they'd hoped for. 580 00:28:47,160 --> 00:28:50,160 I don't know about you, but I have traded in my car for this. 581 00:28:50,160 --> 00:28:53,160 We are just not getting the thrust that we expected. 582 00:28:53,160 --> 00:28:58,160 If you look at the initial pulse, you'll see it's not like a whaa, it's like a poof. 583 00:28:59,160 --> 00:29:03,160 Now what we think is happening is that some things just don't scale up. 584 00:29:03,160 --> 00:29:08,160 This larger diameter nozzle and this cone, they're in scale with the small scale, but 585 00:29:08,160 --> 00:29:13,160 when we moved up to the bigger barrel, we didn't necessarily get a bigger explosion. 586 00:29:13,160 --> 00:29:18,160 And so we think some of that energy is being lost in this large diameter. 587 00:29:18,160 --> 00:29:20,160 It's allowing too much gas to escape. 588 00:29:20,160 --> 00:29:26,160 So what we need to do is go back to the shop, cut this off, and put a smaller diameter nozzle on it. 589 00:29:26,160 --> 00:29:30,160 And see if that holds more gas in, and from that, we'll get more thrust. 590 00:29:30,160 --> 00:29:33,160 The mythbusters have the technology, and quick as a flash, 591 00:29:33,160 --> 00:29:34,160 Gorgeous. 592 00:29:34,160 --> 00:29:36,160 Bang, just like that. 593 00:29:36,160 --> 00:29:38,160 They have rebuilt it. 594 00:29:39,160 --> 00:29:45,160 Back at the runway, the question is, will the smaller nozzle on their pulse jet get them rocketing? 595 00:29:45,160 --> 00:29:47,160 Alright, firing the hole. 596 00:29:50,160 --> 00:29:55,160 Here we go, three, two, one, ignition. 597 00:29:56,160 --> 00:29:58,160 Oh, we already got some movement. 598 00:29:58,160 --> 00:30:00,160 Alright, it's a good sign. 599 00:30:00,160 --> 00:30:04,160 It's a good sign, and it is more thrust than previous tests. 600 00:30:08,160 --> 00:30:09,160 But only marginally. 601 00:30:09,160 --> 00:30:11,160 That is hysterical. 602 00:30:11,160 --> 00:30:12,160 Indurable. 603 00:30:12,160 --> 00:30:14,160 It is adorable, really. 604 00:30:14,160 --> 00:30:16,160 Look out, people. 605 00:30:16,160 --> 00:30:18,160 It's coming through. 606 00:30:18,160 --> 00:30:21,160 I was worried about how we were going to stop it. 607 00:30:21,160 --> 00:30:26,160 And after the slowest fence collision on record, the cart is spent. 608 00:30:28,160 --> 00:30:31,160 That was hilarious. 609 00:30:32,160 --> 00:30:34,160 We get this is the best possible chance of working. 610 00:30:34,160 --> 00:30:40,160 We had a fuel injection system, low rolling resistance tires, continuous triggering, 611 00:30:40,160 --> 00:30:45,160 and still, with all of that, we couldn't go very far or very fast. 612 00:30:45,160 --> 00:30:47,160 This one is well and truly busted. 613 00:30:48,160 --> 00:30:52,160 Their pulse jet barrel may be busted, but as Carrie said earlier, 614 00:30:52,160 --> 00:30:56,160 It's either going to explode, or it's going to zoom down the runway. 615 00:30:56,160 --> 00:31:00,160 There are only two ways this myth can truly end. 616 00:31:03,160 --> 00:31:07,160 After the break, can six dirty seamen swing an escape? 617 00:31:07,160 --> 00:31:10,160 This is dangerous jungle gym antics for adults. 618 00:31:12,160 --> 00:31:16,160 Please do not try what you are about to see at home. 619 00:31:16,160 --> 00:31:18,160 We're what you call experts. 620 00:31:18,160 --> 00:31:19,160 Can't you tell? 621 00:31:20,160 --> 00:31:26,160 We've thoroughly tested the first part of the story, which is the swinging, 622 00:31:26,160 --> 00:31:29,160 and we came up totally busted. 623 00:31:30,160 --> 00:31:33,160 You can't get six people in here and get them to move it. 624 00:31:33,160 --> 00:31:35,160 It's just not possible. 625 00:31:35,160 --> 00:31:39,160 But there's a second and a third part to this story, and that's where we're going now. 626 00:31:39,160 --> 00:31:42,160 Yep, there's still the Kling and Clyde. 627 00:31:42,160 --> 00:31:47,160 If they make like pirates and cheat the swing, can they cart the cage up the cliff? 628 00:31:48,160 --> 00:31:51,160 First, they'll need something to get a grip on. 629 00:31:53,160 --> 00:31:54,160 Are you happy with it? 630 00:31:54,160 --> 00:31:55,160 Yeah, we're done. 631 00:31:56,160 --> 00:32:00,160 This crash-matte rigging combo will stand in for the movie vines. 632 00:32:01,160 --> 00:32:04,160 There it is, a gold fit for a pirate. 633 00:32:04,160 --> 00:32:09,160 Topped off with a flag fit for capture, they're ready to get all hands on deck. 634 00:32:10,160 --> 00:32:12,160 Right, lads, it's time to get swinging. 635 00:32:12,160 --> 00:32:16,160 Now, to be correct to the movie, we've re-extended our cables 636 00:32:16,160 --> 00:32:18,160 to be 80 feet long. 637 00:32:18,160 --> 00:32:21,160 The building behind me is a cliff. 638 00:32:21,160 --> 00:32:24,160 The netting is the vines. 639 00:32:24,160 --> 00:32:27,160 We're going to get in our ball and start swinging. 640 00:32:27,160 --> 00:32:30,160 Inside the ball, it's still the same six savvy seamen, 641 00:32:30,160 --> 00:32:35,160 but more importantly, this time, they're getting a lift from some land-loving muscle. 642 00:32:40,160 --> 00:32:41,160 Holy crap. 643 00:32:41,160 --> 00:32:42,160 There we go. 644 00:32:42,160 --> 00:32:45,160 And three, two, one, go. 645 00:32:47,160 --> 00:32:50,160 Ahhhhhhhhhhhhhhhhhh! 646 00:32:52,160 --> 00:32:56,160 Rather than risk a full speed cliff collision, the tug squad start the swing gently. 647 00:32:56,160 --> 00:32:57,160 This is fun. 648 00:32:57,160 --> 00:32:58,160 This is really fun. 649 00:32:58,160 --> 00:33:01,160 This is dangerous jungle gym antics for adults. 650 00:33:02,160 --> 00:33:06,160 All right, maggots, let's swing towards that wall. 651 00:33:06,160 --> 00:33:08,160 Three, two, one, go. 652 00:33:13,160 --> 00:33:14,160 Not quite. 653 00:33:14,160 --> 00:33:17,160 By every action as an equal and opposite reaction, 654 00:33:17,160 --> 00:33:22,160 and finding that sweet swing spot takes brains and brawn. 655 00:33:24,160 --> 00:33:25,160 Grat! 656 00:33:25,160 --> 00:33:27,160 Well, this swing testing was exactly what I wanted to see, 657 00:33:27,160 --> 00:33:33,160 because the fact that it's taking four strong guys with all of their strength to pull us back 658 00:33:33,160 --> 00:33:38,160 means that that's about what it's going to take to hold on to the rep when we get to the other side. 659 00:33:38,160 --> 00:33:43,160 But with a little more heave-ho, the muscle manages to give them the swing they need. 660 00:33:52,160 --> 00:33:53,160 We're done! 661 00:33:53,160 --> 00:33:56,160 Give it a self-around of applause. 662 00:33:56,160 --> 00:33:58,160 Wait, no, you can't. 663 00:33:59,160 --> 00:34:01,160 All right, let it go on the count of three. 664 00:34:01,160 --> 00:34:04,160 Two, one, let go. 665 00:34:04,160 --> 00:34:06,160 Yeah! 666 00:34:07,160 --> 00:34:09,160 It's an Ar-Ha moment. 667 00:34:09,160 --> 00:34:12,160 A round of applause for the pirates. 668 00:34:12,160 --> 00:34:17,160 To the crew's surprise, hanging on wasn't as difficult as expected. 669 00:34:20,160 --> 00:34:23,160 So we were successful at swinging up to the wall and holding on, 670 00:34:23,160 --> 00:34:29,160 and it requires quite a bit of strength, but at least we're not having to support our own weight and the weight of the ball. 671 00:34:29,160 --> 00:34:32,160 We're simply restricting ourselves from swinging back. 672 00:34:32,160 --> 00:34:37,160 When we start to have to climb the wall, that's when we're going to have to pull all this weight up, 673 00:34:37,160 --> 00:34:39,160 and that's going to be a different story. 674 00:34:39,160 --> 00:34:42,160 Personally, I don't think we're going to be able to do it. 675 00:34:42,160 --> 00:34:44,160 Well, now to put it all together. 676 00:34:44,160 --> 00:34:47,160 Right through, are you ready? 677 00:34:47,160 --> 00:34:51,160 They'll swing, they'll cling, and attempt to capture the flag. 678 00:34:51,160 --> 00:34:54,160 In three, two, one, go. 679 00:34:54,160 --> 00:34:56,160 Whoa. 680 00:34:56,160 --> 00:34:58,160 Oh, God. 681 00:34:58,160 --> 00:35:01,160 Ah! 682 00:35:01,160 --> 00:35:03,160 Yes! 683 00:35:03,160 --> 00:35:05,160 I've grabbed. 684 00:35:05,160 --> 00:35:07,160 Now try and climb. 685 00:35:07,160 --> 00:35:12,160 With the crew clinging on harder than stark trek extras, the climb commences. 686 00:35:15,160 --> 00:35:19,160 It's hand over hand as everyone pulls their weight. 687 00:35:19,160 --> 00:35:20,160 We're going up. 688 00:35:20,160 --> 00:35:22,160 It's working! 689 00:35:22,160 --> 00:35:27,160 And to both Mythbusters' surprise, the 1,500 pound cage ascends. 690 00:35:27,160 --> 00:35:29,160 It's working! 691 00:35:29,160 --> 00:35:32,160 And the ball climbs first one story and then two. 692 00:35:32,160 --> 00:35:34,160 Grab the flag! 693 00:35:34,160 --> 00:35:36,160 Ah! 694 00:35:36,160 --> 00:35:38,160 Ah! 695 00:35:38,160 --> 00:35:41,160 Ah! 696 00:35:41,160 --> 00:35:46,160 After climbing a vertical 12 feet, victory is theirs. 697 00:35:46,160 --> 00:35:49,160 In three, two, one, let go. 698 00:35:49,160 --> 00:35:51,160 Ah! 699 00:35:51,160 --> 00:35:53,160 Wow. 700 00:35:53,160 --> 00:35:54,160 Nice work. 701 00:35:54,160 --> 00:35:55,160 How about that? 702 00:35:55,160 --> 00:35:57,160 We were totally able to climb. 703 00:35:57,160 --> 00:36:00,160 I love being wrong. 704 00:36:00,160 --> 00:36:04,160 Indeed, because you can't argue with that success. 705 00:36:04,160 --> 00:36:07,160 So I grabbed the vine I'm holding onto, which is a vertical rope, 706 00:36:07,160 --> 00:36:11,160 and I still am thinking at this point, there's no way health is going to work. 707 00:36:11,160 --> 00:36:13,160 And then I start to be able to pull on some rope, 708 00:36:13,160 --> 00:36:15,160 and I noticed everybody else is pulling too, 709 00:36:15,160 --> 00:36:16,160 and all of a sudden we're climbing. 710 00:36:16,160 --> 00:36:19,160 One foot, two foot, three feet, and I look up, 711 00:36:19,160 --> 00:36:22,160 and the Jolly Roger here is within our grasp, 712 00:36:22,160 --> 00:36:24,160 and it was a success. 713 00:36:24,160 --> 00:36:27,160 But after all the efforts of their bodily crew, 714 00:36:27,160 --> 00:36:29,160 where does that leave the myth? 715 00:36:29,160 --> 00:36:31,160 Swinging a bone cage under your own powerful inside of you. 716 00:36:31,160 --> 00:36:32,160 Busted. 717 00:36:32,160 --> 00:36:35,160 Catching onto the vines in the side of the ravine, 718 00:36:35,160 --> 00:36:36,160 once you've swung over to it. 719 00:36:36,160 --> 00:36:37,160 Puzzable. 720 00:36:37,160 --> 00:36:39,160 And climbing out of that ravine, 721 00:36:39,160 --> 00:36:41,160 once you've caught onto those vines. 722 00:36:41,160 --> 00:36:42,160 Surprisingly plausible. 723 00:36:42,160 --> 00:36:43,160 Who would have thought? 724 00:36:43,160 --> 00:36:45,160 Arr, arr. 725 00:36:45,160 --> 00:36:52,160 Next, does this noise mean make or break for the ballistic battle? 726 00:36:55,160 --> 00:37:00,160 On a runway in San Joaquin County, 727 00:37:00,160 --> 00:37:03,160 the Barrow Go-Kart myth is about to go ballistic. 728 00:37:03,160 --> 00:37:05,160 We're at the New Jerusalem Airport runway. 729 00:37:05,160 --> 00:37:06,160 Why? 730 00:37:06,160 --> 00:37:09,160 Because we're mythbusters, and we're not going to be satisfied. 731 00:37:09,160 --> 00:37:12,160 With a five mile an hour run we've got with our Barrow Rocket, 732 00:37:12,160 --> 00:37:13,160 and that's being generous. 733 00:37:13,160 --> 00:37:15,160 We want to see something impressive. 734 00:37:17,160 --> 00:37:19,160 And that is where Bob Maddox comes in. 735 00:37:19,160 --> 00:37:20,160 Absolutely. 736 00:37:20,160 --> 00:37:23,160 Because if Bob's propulsive prowess can make a poison, 737 00:37:23,160 --> 00:37:26,160 if his propulsive prowess can make a push-bike jet-propelled, 738 00:37:26,160 --> 00:37:28,160 imagine what he can do with a barrel. 739 00:37:28,160 --> 00:37:32,160 This thing is going to be insane. 740 00:37:32,160 --> 00:37:35,160 Now Bob is one of the few people in the world, 741 00:37:35,160 --> 00:37:38,160 with the job title, Professional Pulse Jet Builder. 742 00:37:38,160 --> 00:37:42,160 He's been designing and building these jets for over 20 years. 743 00:37:42,160 --> 00:37:46,160 He's taken our Barrow Rocket design and highly modified it. 744 00:37:46,160 --> 00:37:48,160 It may look the same on the outside, 745 00:37:48,160 --> 00:37:50,160 but inside it's completely different. 746 00:37:50,160 --> 00:37:52,160 And it's going to be totally badass. 747 00:37:52,160 --> 00:37:56,160 But just what exactly are these badass modifications? 748 00:37:56,160 --> 00:38:00,160 Now tell us what some of the differences are between ours and yours. 749 00:38:00,160 --> 00:38:04,160 Well the difference is mostly is we have a one-way read valve up here in the front. 750 00:38:04,160 --> 00:38:08,160 When the explosion goes off, it makes all the gases go out the tail, 751 00:38:08,160 --> 00:38:10,160 and won't go out the front. 752 00:38:10,160 --> 00:38:13,160 The one-way valve focuses the thrust more efficiently, 753 00:38:13,160 --> 00:38:18,160 but the major change is that this pulse jet pulses at heart-stopping speed. 754 00:38:18,160 --> 00:38:21,160 And that happens 70 or 80 times a second inside of this one, 755 00:38:21,160 --> 00:38:24,160 where yours was only once every four or five seconds or whatever. 756 00:38:24,160 --> 00:38:28,160 Let's see if yours will match our whopping five mile an hour speed. 757 00:38:29,160 --> 00:38:33,160 Bob's about to fire up the Barrow Rocket car for the first time. 758 00:38:33,160 --> 00:38:35,160 Now it's going to be tethered, we're going to turn it on, 759 00:38:35,160 --> 00:38:37,160 just to make sure everything's working. 760 00:38:37,160 --> 00:38:39,160 Alright Bob, fire it up! 761 00:38:39,160 --> 00:38:41,160 Alright, let's see if we can tear up this runway. 762 00:38:41,160 --> 00:38:44,160 It's an important tethered systems check. 763 00:38:45,160 --> 00:38:47,160 Oh sh**! 764 00:38:50,160 --> 00:38:53,160 Because as the subtitles make clear, 765 00:38:53,160 --> 00:38:58,160 70 pulses a second is a lot more powerful than expected. 766 00:39:00,160 --> 00:39:04,160 Alright, it's a little bit louder, maybe a little more powerful than ours. 767 00:39:04,160 --> 00:39:06,160 That's scary, that's a little scary. 768 00:39:06,160 --> 00:39:11,160 Maybe we should have some safety precautions to keep this thing from flying off into who knows where. 769 00:39:11,160 --> 00:39:13,160 Maybe we should cable it down. 770 00:39:13,160 --> 00:39:15,160 That thing is awesome. 771 00:39:15,160 --> 00:39:18,160 Now we know Bob can build a pulse jet engine, 772 00:39:18,160 --> 00:39:23,160 but he has never attached it to a go kart made out of a barrel and four bicycle wheels. 773 00:39:23,160 --> 00:39:26,160 So we have no idea what's going to happen, I mean this thing could explode, 774 00:39:26,160 --> 00:39:28,160 it could go flying out of control. 775 00:39:28,160 --> 00:39:33,160 So we have taken some extra safety precautions to make sure nothing bad happens. 776 00:39:33,160 --> 00:39:37,160 One, we have a steel cable that will be running down the leg of our runway 777 00:39:37,160 --> 00:39:39,160 so that our kart stays on track. 778 00:39:39,160 --> 00:39:45,160 We also added a kill switch so if it does go out of control, we can shut it down whenever we want. 779 00:39:45,160 --> 00:39:48,160 At the end of the runway we have K-Rail set up, 780 00:39:48,160 --> 00:39:51,160 so that way if it does get out of control it has a barrier to crash into. 781 00:39:51,160 --> 00:39:54,160 We'll be standing behind the blast shield while this all takes place. 782 00:39:54,160 --> 00:39:58,160 This is going to be awesome, but most importantly, it's going to be safe. 783 00:39:58,160 --> 00:40:00,160 4,000 feet of cable. 784 00:40:00,160 --> 00:40:02,160 That should keep our kart in line. 785 00:40:02,160 --> 00:40:07,160 It should, but the pulse jet go kart won't be the only thing on the line. 786 00:40:07,160 --> 00:40:10,160 There's also their previous record. 787 00:40:12,160 --> 00:40:19,160 We're going to have to surpass a record here of the last barrel rocket, five miles an hour. 788 00:40:19,160 --> 00:40:22,160 So for this to be impressive, I want to see highway speeds. 789 00:40:22,160 --> 00:40:25,160 Now Bob has been perfecting his engine for years. 790 00:40:25,160 --> 00:40:30,160 Now we had three days to build ours and we were able to get it to go with five miles an hour. 791 00:40:30,160 --> 00:40:33,160 I'm hoping this can go faster than ours. 792 00:40:33,160 --> 00:40:34,160 I'm pretty sure it will. 793 00:40:34,160 --> 00:40:35,160 Let's go. 794 00:40:35,160 --> 00:40:39,160 Okay, I'm going to measure the speed because I have a feeling he's flying. 795 00:40:39,160 --> 00:40:45,160 The team retires to a safe distance and it's over to Bob to initiate launch. 796 00:40:49,160 --> 00:40:51,160 And run for his life. 797 00:40:51,160 --> 00:40:57,160 Alright, this is pulse jet barrel rocket on steroids. Here we go. In three, two, one. 798 00:40:58,160 --> 00:41:01,160 Then the barrel is unleashed. 799 00:41:02,160 --> 00:41:04,160 Woo hoo hoo! 800 00:41:04,160 --> 00:41:08,160 And it thunders down the runway at speed. 801 00:41:12,160 --> 00:41:13,160 Fifty miles an hour. 802 00:41:13,160 --> 00:41:15,160 Dude, that was awesome. 803 00:41:15,160 --> 00:41:17,160 You know what, this myth is still busted. 804 00:41:17,160 --> 00:41:21,160 I mean, look at what we had to resort to to make this work. 805 00:41:21,160 --> 00:41:22,160 A professional. 806 00:41:22,160 --> 00:41:24,160 Oh Bob, that was awesome. 807 00:41:24,160 --> 00:41:26,160 Nice work. 808 00:41:27,160 --> 00:41:34,160 Finally, after a string of failures, the mythbusters have gotten their happy ending. 809 00:41:34,160 --> 00:41:40,160 The cart jetted a mile down the runway at super speed. 810 00:41:40,160 --> 00:41:45,160 The thing that you don't get and you're probably not going to get to experience this in full at home 811 00:41:45,160 --> 00:41:47,160 is the sound this thing makes. 812 00:41:47,160 --> 00:41:51,160 It's like, nooooooooo! 813 00:41:51,160 --> 00:42:00,160 Finally, we got it to work. We got our barrel jet to go down the runway at 50 miles an hour. 814 00:42:00,160 --> 00:42:04,160 Okay, so we had to bring in an expert with a completely different jet engine. 815 00:42:04,160 --> 00:42:09,160 But still, we got a barrel with a guy on it going down the runway at 50 miles an hour. 816 00:42:09,160 --> 00:42:12,160 This is still busted, but it's pretty awesome. 817 00:42:21,160 --> 00:42:28,160 Want to know why we did what we did and why we didn't do what we didn't? 818 00:42:28,160 --> 00:42:33,160 Go to Discovery.com slash Mythbusters Aftershow and check it out.