1 00:00:00,000 --> 00:00:04,000 Remember, don't try this at home. 2 00:00:04,000 --> 00:00:10,560 We've got years of experience that keeps us safe. 3 00:00:10,560 --> 00:00:11,880 Coming up on MythBusters. 4 00:00:11,880 --> 00:00:15,840 It's Myths Revisited, where we take you on. 5 00:00:15,840 --> 00:00:17,840 There's crashes. 6 00:00:17,840 --> 00:00:18,840 Whoa! 7 00:00:18,840 --> 00:00:19,840 Bangs. 8 00:00:19,840 --> 00:00:20,840 And wallah. 9 00:00:20,840 --> 00:00:29,000 In a Myths Revisited special, Ken Salami really work as a rocket fuel. 10 00:00:29,000 --> 00:00:31,880 Stand back and come and get some rocket fuel out of the fridge. 11 00:00:31,880 --> 00:00:36,520 Tori and Grant see if a hand-braised on a windshield will stop it from shattering. 12 00:00:36,520 --> 00:00:38,160 I'll miss you, buddy. 13 00:00:38,160 --> 00:00:42,760 Then Adam and Jamie revisit the best way to drive a pickup truck. 14 00:00:42,760 --> 00:00:46,040 This test is tailgate up, just like old times. 15 00:00:46,040 --> 00:00:49,280 And finally, there's a battle of the blades. 16 00:00:49,280 --> 00:00:53,760 Can a sword slice through a machine gun? 17 00:00:53,760 --> 00:00:54,760 Whoa! 18 00:00:54,760 --> 00:00:59,520 Who are the Mythbusters? 19 00:00:59,520 --> 00:01:03,520 Adam Savage. 20 00:01:03,520 --> 00:01:04,520 And Jamie Heineman. 21 00:01:04,520 --> 00:01:08,000 Aren't Tracer rounds illegal? 22 00:01:08,000 --> 00:01:11,360 Between them, over 30 years special effects experience. 23 00:01:11,360 --> 00:01:13,440 That's what I'm jogging about. 24 00:01:13,440 --> 00:01:15,880 Joining them, Tori Belleggi. 25 00:01:15,880 --> 00:01:16,880 What could go wrong? 26 00:01:16,880 --> 00:01:17,880 Carrie Byron. 27 00:01:17,880 --> 00:01:19,680 We're going for total annihilation. 28 00:01:19,680 --> 00:01:20,680 And Grant Imahara. 29 00:01:20,680 --> 00:01:22,880 I'm pooping as fast as I can. 30 00:01:22,880 --> 00:01:25,800 They don't just tell the Myths. 31 00:01:25,800 --> 00:01:40,080 They put them to the test. 32 00:01:40,080 --> 00:01:45,640 The more we do this show, the more I think really committed we are to trying to get at 33 00:01:45,640 --> 00:01:49,320 least some kind of scientific approach to what we're doing. 34 00:01:49,320 --> 00:01:54,080 But I get a lot of angry emails from fans complaining that you screwed this up or you 35 00:01:54,080 --> 00:01:56,800 messed that up or you guys have no idea what you're doing. 36 00:01:56,800 --> 00:02:00,400 Are you going to say anything but yep? 37 00:02:00,400 --> 00:02:05,480 Well, this is another Myths Revisited episode. 38 00:02:05,480 --> 00:02:09,920 We're going to take another stab at some Myths that viewers found incredibly controversial. 39 00:02:09,920 --> 00:02:12,920 And the first one is Salami Rocket. 40 00:02:12,920 --> 00:02:13,920 Yep. 41 00:02:13,920 --> 00:02:26,800 In Salami Rocket, Adam and Jamie wanted to find out if Lunch and Meat could get launched. 42 00:02:26,800 --> 00:02:32,040 Three, two, one. 43 00:02:32,040 --> 00:02:33,040 Hey! 44 00:02:33,040 --> 00:02:36,040 Look at that! 45 00:02:36,040 --> 00:02:38,200 Twenty feet, man! 46 00:02:38,200 --> 00:02:39,520 What did I tell you? 47 00:02:39,520 --> 00:02:43,360 But according to some fans, with this rocket, it's Houston. 48 00:02:43,360 --> 00:02:45,000 We have a problem. 49 00:02:45,000 --> 00:02:48,240 Well, I don't know what more of the viewers want. 50 00:02:48,240 --> 00:02:50,160 We got the rocket off the ground. 51 00:02:50,160 --> 00:02:55,320 Yes, but the viewers are saying that we did not get a bonafide ignition. 52 00:02:55,320 --> 00:02:56,640 It flew. 53 00:02:56,640 --> 00:03:03,200 Yeah, they claim that all we got was the release of nitrous oxide propelling that rocket. 54 00:03:03,200 --> 00:03:07,680 There was no actual ignition, just the gas alone and its pressure gave our rocket that 55 00:03:07,680 --> 00:03:08,680 launch. 56 00:03:09,160 --> 00:03:13,240 I think now would be a good time for a graphic. 57 00:03:13,240 --> 00:03:16,800 Their original rocket was a two-tank hybrid rocket. 58 00:03:16,800 --> 00:03:22,440 The bottom half contained the Salami Rocket fuel and the top, the fuel oxidizer, liquid 59 00:03:22,440 --> 00:03:25,200 nitrous oxide or NOx. 60 00:03:25,200 --> 00:03:31,240 The theory was that on ignition, the Salami gently smoldered until the NOx was released 61 00:03:31,240 --> 00:03:33,480 with explosive results. 62 00:03:33,480 --> 00:03:39,560 But some fans think that the Salami was never actually a light, so the thrust they got was 63 00:03:39,560 --> 00:03:42,280 thanks only to the release of the NOx. 64 00:03:42,280 --> 00:03:44,000 So we have to retest it. 65 00:03:44,000 --> 00:03:49,200 This is just a total proof of concept, just to see if we can get ignition between the 66 00:03:49,200 --> 00:03:53,560 NOx and the Salami and to see if that ignition produces real thrust. 67 00:03:53,560 --> 00:03:54,560 Huh. 68 00:03:55,560 --> 00:04:01,680 To find out if their rocket was a NOx no-hopper or a Salami sizzler, the mythbusters have 69 00:04:01,720 --> 00:04:04,040 dusted off their original plans. 70 00:04:04,040 --> 00:04:06,040 Rocket fuel. 71 00:04:06,040 --> 00:04:12,520 So, first things first, it's back to the butcher's board. 72 00:04:12,520 --> 00:04:18,120 Remember the bandsaw was invented for cutting meat. 73 00:04:18,120 --> 00:04:23,320 Just like last time, Adam's starting by shaping the Salamis so that they'll fit snugly into 74 00:04:23,320 --> 00:04:24,320 the rocket. 75 00:04:24,320 --> 00:04:26,320 Uh, disgusting. 76 00:04:26,760 --> 00:04:36,760 And just like last time, Adam's suffering from innuendo overload to many jokes. 77 00:04:36,760 --> 00:04:42,760 With Adam showing the restraint of a saint, he heads on to tackle another viewer complaint, 78 00:04:42,760 --> 00:04:45,000 the graphite exhaust nozzle. 79 00:04:45,000 --> 00:04:50,640 Despite Adam's silky skills, there were some fans who thought his original nozzles were 80 00:04:50,640 --> 00:04:52,040 not strong enough. 81 00:04:52,200 --> 00:04:58,120 So, I've made the new ones with a much thicker lip, should provide a lot more material and 82 00:04:58,120 --> 00:05:00,120 provide a lot more strength. 83 00:05:00,120 --> 00:05:03,960 Come launch time, these reinforced nozzles should do the business. 84 00:05:03,960 --> 00:05:08,920 But for this experiment, the term launch is not entirely accurate, because they're going 85 00:05:08,920 --> 00:05:12,760 to do these tests locked down. 86 00:05:12,760 --> 00:05:18,640 We're going to do the Salami Rocket Revisit Bench Tests right here outside the shop, but 87 00:05:18,640 --> 00:05:19,960 inside the bunker. 88 00:05:19,960 --> 00:05:26,080 Now, this bunker is specifically designed to be able to contain things like flame and 89 00:05:26,080 --> 00:05:30,080 explosions and projectiles that we don't want to expose ourselves to. 90 00:05:30,080 --> 00:05:35,400 And to get some data without a launch into the sky, Jamie's built a special clamp that 91 00:05:35,400 --> 00:05:37,880 will hold the rocket in place. 92 00:05:37,880 --> 00:05:40,200 That looks pretty nifty. 93 00:05:40,200 --> 00:05:44,760 At each end of the clamp, he's putting force meters that should measure the amount of thrust 94 00:05:44,760 --> 00:05:48,680 the locked down rocket gives off on ignition. 95 00:05:48,720 --> 00:05:55,320 And with countdown approaching, Jamie puts the finishing touches to the rocket fuel, 96 00:05:55,320 --> 00:05:58,560 an inner coating of gunpowder. 97 00:05:58,560 --> 00:06:02,920 This is an invention of mine that's called self cooking meat. 98 00:06:02,920 --> 00:06:08,920 So while there won't be a vertical launch with Salamis, rockets and gunpowder, there'll 99 00:06:08,920 --> 00:06:11,920 still be some fireworks. 100 00:06:12,920 --> 00:06:18,920 Now it's time for things to get rough. 101 00:06:18,920 --> 00:06:26,920 Good to go for run number one, 15 miles per hour. 102 00:06:26,920 --> 00:06:33,040 When the team tested the myth about driving on rough roads, paramedics are nowhere to 103 00:06:33,040 --> 00:06:34,040 be found. 104 00:06:34,040 --> 00:06:38,160 They found that for a smoother ride, the faster you go, the better. 105 00:06:38,160 --> 00:06:41,160 But now, fans want to know something new. 106 00:06:42,160 --> 00:06:46,160 Well, Grant, I understand you have an interesting side myth here. 107 00:06:46,160 --> 00:06:48,520 Yep, and it has to do with rocks on the road. 108 00:06:48,520 --> 00:06:52,880 And if you have a vehicle approaching you, or if you're following one that might kick 109 00:06:52,880 --> 00:06:57,920 up a rock into your windshield, you put your hand up on it and apply pressure. 110 00:06:57,920 --> 00:07:02,400 And doing this will save your windshield if a rock hits it. 111 00:07:02,400 --> 00:07:04,320 It's another car caper. 112 00:07:04,320 --> 00:07:09,480 Can racing your hand against a windshield really prevent it from being shattered by roadside 113 00:07:09,480 --> 00:07:10,480 shrapnel? 114 00:07:11,480 --> 00:07:18,040 To test this driver's dilemma, rather than using Jamie's hammer, Grant and Tori are actually 115 00:07:18,040 --> 00:07:23,040 going to fire rocks at windshields with that childhood favorite, the slingshot. 116 00:07:23,040 --> 00:07:25,040 One, two, three. 117 00:07:29,040 --> 00:07:31,040 Did you guys see where that went? 118 00:07:34,040 --> 00:07:37,440 But of course, they're not just going to release rocks at random. 119 00:07:37,440 --> 00:07:42,440 Instead, Tori's built a rig that should fire with pinpoint accuracy. 120 00:07:44,440 --> 00:07:45,440 I think that's going to work. 121 00:07:45,440 --> 00:07:46,440 Just fine. 122 00:07:47,440 --> 00:07:50,440 But it's not just the aim that's important for this shootout. 123 00:07:51,440 --> 00:07:57,680 Well, I'm setting up the chronograph so that we can get an idea how fast Tori's slingshot 124 00:07:57,680 --> 00:07:59,560 is throwing those rocks. 125 00:07:59,560 --> 00:08:04,040 Our target velocity is somewhere in the order of 70 miles per hour. 126 00:08:04,040 --> 00:08:10,640 With the chronograph up and running and Tori's focused, everything's set for a speed test. 127 00:08:10,640 --> 00:08:12,640 I'm going to stand behind you. 128 00:08:12,640 --> 00:08:14,640 Why, Grant? 129 00:08:14,640 --> 00:08:17,640 Remember, they're looking to hit 70 miles an hour. 130 00:08:17,640 --> 00:08:19,640 Three, two, one. 131 00:08:21,640 --> 00:08:22,640 There you go. 132 00:08:22,640 --> 00:08:29,640 Okay, 67 feet per second, 45.7 miles per hour. 133 00:08:29,640 --> 00:08:31,140 45 miles an hour. 134 00:08:31,140 --> 00:08:33,640 So we need another at least 25 miles. 135 00:08:34,240 --> 00:08:35,240 Faster. 136 00:08:35,240 --> 00:08:36,240 Okay. 137 00:08:36,240 --> 00:08:41,240 To crank up the speed, Tori yanks the elastic eight inches further back. 138 00:08:44,240 --> 00:08:45,240 You can hit the chrono, man. 139 00:08:45,240 --> 00:08:47,240 It went right through the box. 140 00:08:48,240 --> 00:08:49,240 Perfect. 141 00:08:49,240 --> 00:08:50,240 76 miles per hour. 142 00:08:50,240 --> 00:08:51,240 Okay. 143 00:08:51,240 --> 00:08:53,240 Now they just need a car. 144 00:08:53,240 --> 00:08:58,640 Check, a handful of stones, check, and a blanket to catch any ricochets. 145 00:08:58,640 --> 00:08:59,640 Check. 146 00:09:00,240 --> 00:09:05,040 And with the list checked off, they're finally ready to fire at the windshield, both with 147 00:09:05,040 --> 00:09:08,040 and without Grant racing it with his hand. 148 00:09:08,040 --> 00:09:11,440 All right, Grant, I'm ready to start breaking windows with rocks, but before I stick you 149 00:09:11,440 --> 00:09:16,240 in that car to shoot it, I want to make sure we can actually break a windshield with the 150 00:09:16,240 --> 00:09:17,240 rock. 151 00:09:17,240 --> 00:09:18,240 Okay. 152 00:09:18,240 --> 00:09:20,240 Don't let that thing go. 153 00:09:20,240 --> 00:09:21,240 Okay. 154 00:09:21,240 --> 00:09:23,240 Three, two, one. 155 00:09:23,240 --> 00:09:25,240 Perfect shot. 156 00:09:25,240 --> 00:09:27,240 That's a pretty good hit. 157 00:09:27,240 --> 00:09:28,240 Okay. 158 00:09:28,240 --> 00:09:29,240 No shattered windshield. 159 00:09:29,240 --> 00:09:35,040 At 70 miles an hour, there's no broken glass, even without the hand. 160 00:09:35,040 --> 00:09:39,740 They try again, but this windshield is a tough nut to crack. 161 00:09:39,740 --> 00:09:42,640 So next they decide to go for broke. 162 00:09:42,640 --> 00:09:47,240 Well, since Jamie passed this kidney stone, we figured it'd be soon to shoot it through 163 00:09:47,240 --> 00:09:48,240 the windshield. 164 00:09:48,240 --> 00:09:49,240 This is 150-gram stone. 165 00:09:49,240 --> 00:09:52,240 We're going to see what kind of damage it does. 166 00:09:52,240 --> 00:09:55,240 Surely this monster will get the result thereafter. 167 00:09:55,240 --> 00:09:56,240 Okay. 168 00:09:56,240 --> 00:09:57,240 Here we go. 169 00:09:57,240 --> 00:09:58,240 Three, two, one. 170 00:09:59,240 --> 00:10:00,740 But no. 171 00:10:00,740 --> 00:10:06,340 There's a spider web crack, but no full-on shatter, which means it's back to the drawing 172 00:10:06,340 --> 00:10:07,340 board. 173 00:10:07,340 --> 00:10:08,980 Still to come. 174 00:10:08,980 --> 00:10:10,840 Will the baloney go ballistic? 175 00:10:10,840 --> 00:10:12,840 One, go. 176 00:10:12,840 --> 00:10:15,920 That sounded like a hell of a thug. 177 00:10:15,920 --> 00:10:18,160 But next, talk to the hand. 178 00:10:18,160 --> 00:10:20,040 Will the windshield get shattered? 179 00:10:20,040 --> 00:10:23,040 Three, two, one. 180 00:10:23,040 --> 00:10:36,920 You can protect that schoolgirl complexion with DuPlate Safety Glass. 181 00:10:36,920 --> 00:10:41,760 There are a whole host of ways to strengthen a car's windows, but is it true that your 182 00:10:41,760 --> 00:10:46,040 hand, braced up on the glass, can make it unbreakable? 183 00:10:46,040 --> 00:10:51,640 Well, Tori and Grant are on the case, but so far they're struggling to even shatter 184 00:10:51,640 --> 00:10:53,200 a windshield in the first place. 185 00:10:53,200 --> 00:10:54,200 Okay, here we go. 186 00:10:54,200 --> 00:10:57,200 Three, two, one. 187 00:10:57,200 --> 00:10:59,200 Whoa. 188 00:10:59,200 --> 00:11:01,600 Add after a quick research break. 189 00:11:01,600 --> 00:11:02,600 Grant discovers why. 190 00:11:02,600 --> 00:11:07,880 I think we've been having such difficulty with this windshield myth because we've been 191 00:11:07,880 --> 00:11:09,920 using laminated windshields. 192 00:11:09,920 --> 00:11:14,880 And here in America, it's been common practice to use those since the 1920s. 193 00:11:14,880 --> 00:11:19,360 Well, what I think is that this myth comes from other countries, but they've been using 194 00:11:19,360 --> 00:11:23,800 tempered glass windshields up until 1994. 195 00:11:23,800 --> 00:11:26,560 Tempered glass should be much easier to break. 196 00:11:26,560 --> 00:11:31,680 So to kickstart this myth, they're removing the laminated windshield. 197 00:11:31,680 --> 00:11:34,040 This job just keeps getting better and better. 198 00:11:34,040 --> 00:11:40,680 The mythbuster way. 199 00:11:40,680 --> 00:11:44,880 After Tori has flipped out on the car, Grant flips her around. 200 00:11:44,880 --> 00:11:51,600 What turns out on this model, the rear window is tempered and not laminated. 201 00:11:51,600 --> 00:11:53,880 And they're also going to make another change. 202 00:11:53,880 --> 00:12:01,800 Man, if I had a nickel for every window I shot out with a BB gun, I wouldn't be working. 203 00:12:01,800 --> 00:12:06,680 They're abandoning the slingshot, and instead they're going to use a BB gun, which should 204 00:12:06,680 --> 00:12:11,200 be easier to aim, easier to reload, and that's not all. 205 00:12:11,200 --> 00:12:14,840 The good thing about the BB gun, the BBs are all uniform. 206 00:12:14,960 --> 00:12:18,120 They're exactly the same, so that takes out any variability that we might have with the 207 00:12:18,120 --> 00:12:19,120 stone. 208 00:12:19,120 --> 00:12:23,640 That's the theory, but will the BB be powerful enough to shatter the shield? 209 00:12:23,640 --> 00:12:25,640 What's your prediction? 210 00:12:25,640 --> 00:12:28,520 He's going to take a BB in the nuts. 211 00:12:28,520 --> 00:12:32,520 Here we go in three, two, one. 212 00:12:32,520 --> 00:12:33,520 Okay. 213 00:12:33,520 --> 00:12:38,520 Looks like that breaks the windshield. 214 00:12:38,520 --> 00:12:42,480 At last, they get the break thereafter. 215 00:12:42,480 --> 00:12:46,640 So now they can put this myth to the test. 216 00:12:46,640 --> 00:12:50,280 With a replacement window in place, here we go. 217 00:12:50,280 --> 00:12:56,040 Tari's going to fire an identical BB, and Grant will brace his hand against the glass. 218 00:12:56,040 --> 00:12:58,280 Will the windshield still shatter? 219 00:12:58,280 --> 00:13:00,840 I'll miss you, buddy. 220 00:13:00,840 --> 00:13:02,280 I'm going to catch it in my teeth. 221 00:13:02,280 --> 00:13:08,200 All right, so this is BB shot onto tempered glass, Grant bracing the windshield. 222 00:13:08,200 --> 00:13:11,480 In three, two, one. 223 00:13:11,680 --> 00:13:14,120 Oh, that went. 224 00:13:14,120 --> 00:13:16,520 You holding the windshield didn't seem to help much. 225 00:13:16,520 --> 00:13:18,920 No, not at all. 226 00:13:18,920 --> 00:13:23,800 The windshield was definitely not protected by the hand, but the team isn't quite ready 227 00:13:23,800 --> 00:13:26,080 to call it myth-busted yet. 228 00:13:26,080 --> 00:13:31,880 What we didn't do in the previous test is dial in at what point the windshield will 229 00:13:31,880 --> 00:13:32,880 shatter. 230 00:13:32,880 --> 00:13:36,720 So what we're going to do, I have a BB gun, and I'm going to take a shot, pump it up, 231 00:13:36,720 --> 00:13:40,920 take a shot, pump it up twice, take a shot, and I'm going to keep pumping it up, taking 232 00:13:40,920 --> 00:13:45,800 a shot until we find at the exact point it'll take to crack this windshield. 233 00:13:45,800 --> 00:13:46,800 Here we go. 234 00:13:46,800 --> 00:13:48,720 Three, two, one. 235 00:13:48,720 --> 00:13:53,960 Tari's worried that in the last test, the BB was fired so fast that it was always going 236 00:13:53,960 --> 00:13:55,400 to shatter the windshield. 237 00:13:55,400 --> 00:13:59,040 One, two, three, four. 238 00:13:59,040 --> 00:14:03,840 So for the next test, he's calibrating the BB so that it fires at a speed which only 239 00:14:03,840 --> 00:14:06,640 just smashes the unbraced glass. 240 00:14:06,640 --> 00:14:10,400 One, two, three, four, five, six. 241 00:14:10,520 --> 00:14:11,520 Okay. 242 00:14:13,520 --> 00:14:14,520 Okay. 243 00:14:14,520 --> 00:14:19,920 Six pumps at this angle seems to be the winning number. 244 00:14:19,920 --> 00:14:25,240 With the BB dialed in, it's time to talk to the hand. 245 00:14:25,240 --> 00:14:32,560 So now we're going to do another test with me inside of the car holding the glass to 246 00:14:32,560 --> 00:14:39,200 see if this is going to prevent it from breaking or if it's just going to break anyway. 247 00:14:39,200 --> 00:14:40,960 It's the moment of truth. 248 00:14:40,960 --> 00:14:45,120 Grant assumes the position and Tari pumps to six. 249 00:14:45,120 --> 00:14:49,840 If the new windshield doesn't bust now, the myth is confirmed. 250 00:14:49,840 --> 00:14:53,320 Three, two, one. 251 00:14:53,320 --> 00:14:59,560 Well, it doesn't look like putting your hand up against the windshield really does much, 252 00:14:59,560 --> 00:15:00,560 does it? 253 00:15:00,560 --> 00:15:04,200 Tari's got it right on. 254 00:15:04,200 --> 00:15:09,360 Grant gave the windshield a hand, but it was still smashed to smithereens. 255 00:15:09,360 --> 00:15:12,960 My feeling is it doesn't matter whether or not you put your hand up against the windshield, 256 00:15:12,960 --> 00:15:13,960 it's going to break. 257 00:15:13,960 --> 00:15:15,840 Okay, fair enough. 258 00:15:15,840 --> 00:15:17,440 You're so over this one, huh? 259 00:15:17,440 --> 00:15:21,920 You tried getting BBs and rocks shot at you about a dozen times. 260 00:15:21,920 --> 00:15:23,760 We'll see how you feel. 261 00:15:23,760 --> 00:15:25,240 So that's it. 262 00:15:27,000 --> 00:15:30,560 Grant's patience is shattered and this myth is busted. 263 00:15:34,640 --> 00:15:38,080 Later, Tari, Kari and Grant chop down another myth. 264 00:15:41,080 --> 00:15:42,880 Sounds like some rabbit. 265 00:15:42,880 --> 00:15:46,120 But next, will the Salami Sky Rocket. 266 00:15:46,120 --> 00:15:48,960 Three, two, one. 267 00:15:56,840 --> 00:16:01,640 Cotto Salami, mortadella, rocket fuel, rocket fuel, who needs a rocket fuel? 268 00:16:01,640 --> 00:16:07,320 When the Salami Rocket revisit, the boys are all set to see if Baloti can go ballistic, 269 00:16:07,320 --> 00:16:11,080 because fans weren't convinced. 270 00:16:11,080 --> 00:16:17,360 We're having a revisit of this because there was a concern that the lift off that we got 271 00:16:17,360 --> 00:16:23,840 in a previous experiment might have been just the nitrous oxide coming out of the tank. 272 00:16:23,840 --> 00:16:28,120 And if, obviously, if there was enough of it, if it was energetic enough of it, we might 273 00:16:28,120 --> 00:16:33,360 have gotten some kind of burst from that, but not actually achieved ignition. 274 00:16:33,360 --> 00:16:38,720 To find an answer once and for all, the mythbusters have made some new meat missiles. 275 00:16:38,720 --> 00:16:41,200 But how do they work again? 276 00:16:41,200 --> 00:16:44,520 It's a bench stand test for Salami Rocket. 277 00:16:44,520 --> 00:16:47,080 This right here is the Salami Rocket. 278 00:16:47,080 --> 00:16:48,880 Nitrous oxide goes in here. 279 00:16:48,880 --> 00:16:52,960 This is an electrically actuated valve that releases it into the ignition chamber where 280 00:16:52,960 --> 00:16:56,080 we put the Salami and a nozzle. 281 00:16:56,080 --> 00:16:59,960 This rocket will be pushing this way, and we've got a force meter right here to test 282 00:16:59,960 --> 00:17:03,320 how much force it is pushing this way. 283 00:17:03,320 --> 00:17:08,000 We also have an analog force meter right here, a plate of steel, that the rocket exhaust 284 00:17:08,000 --> 00:17:13,760 will push against and actually give us a different relative measurement of exactly how much force 285 00:17:13,760 --> 00:17:15,560 the rockets are putting out. 286 00:17:15,560 --> 00:17:19,840 The mythbusters are going to run a bunch of tests and compare the thrust levels recorded 287 00:17:19,840 --> 00:17:21,120 on the force gauges. 288 00:17:21,120 --> 00:17:25,560 And for test one, they're going to address the fans' main complaint by measuring the 289 00:17:25,560 --> 00:17:27,680 force put out by the NOx alone. 290 00:17:27,680 --> 00:17:32,120 No Salami, no ignition, just escaping gas. 291 00:17:32,120 --> 00:17:34,720 Okay, this is NO2 only. 292 00:17:34,720 --> 00:17:35,720 Yeah. 293 00:17:35,720 --> 00:17:38,720 And three, two, one. 294 00:17:38,720 --> 00:17:44,720 That sounded like a hell of a thug. 295 00:17:44,720 --> 00:17:48,400 Well, let's see what the force gauge said. 296 00:17:48,400 --> 00:17:51,520 I believe that would be a pretty good one. 297 00:17:51,520 --> 00:17:56,120 Okay, the force gauge says 78 pounds of force. 298 00:17:56,120 --> 00:18:01,760 78 pounds of thrust sounds a lot, and it sure looks violent. 299 00:18:01,760 --> 00:18:08,120 But would this alone have been enough to propel their original Salami rocket to the sky? 300 00:18:08,120 --> 00:18:15,000 Adam and Jamie do the math, calibrating the force and weight, and wait for it. 301 00:18:15,000 --> 00:18:19,120 Okay, I will give it to the viewers. 302 00:18:19,120 --> 00:18:20,760 They may actually be right. 303 00:18:20,760 --> 00:18:25,160 The evidence supports it here that just the pure release of nitrous oxide from that top 304 00:18:25,160 --> 00:18:29,440 tank would be enough to get the rocket off the rocket stand. 305 00:18:29,440 --> 00:18:35,320 So it's looking like viewers won mythbusters zero. 306 00:18:35,320 --> 00:18:39,960 And if the escaping NOx was enough to launch the original rocket, then the mythbusters 307 00:18:39,960 --> 00:18:42,480 need to head back to square one. 308 00:18:42,480 --> 00:18:46,600 Can Salami add anything to the reaction? 309 00:18:46,600 --> 00:18:51,160 Come back and come and get some rocket fuel out of the fridge. 310 00:18:51,160 --> 00:18:54,920 For test two, they're loading the rocket up to the max. 311 00:18:54,920 --> 00:18:58,120 Salami is the fuel, and NOx is the oxidizer. 312 00:18:58,120 --> 00:19:02,560 And they're also adding an igniter to make sure that the Salami, with its black powder 313 00:19:02,560 --> 00:19:06,720 filling, is smoldering when the NOx is released. 314 00:19:06,720 --> 00:19:13,840 We're guiding them with little model rocket engines like this, and the new mythbusters 315 00:19:13,840 --> 00:19:15,640 launch button. 316 00:19:15,640 --> 00:19:20,560 The rocket's ready, but the question is, will this setup produce any more thrust on the 317 00:19:20,560 --> 00:19:22,760 force gauge? 318 00:19:22,760 --> 00:19:30,840 In three, two, one, go. 319 00:19:30,840 --> 00:19:32,880 Now that sounds more like it should. 320 00:19:32,880 --> 00:19:36,280 It's the moment of truth. 321 00:19:36,280 --> 00:19:41,200 Mythbuster pride is on the line. 322 00:19:41,200 --> 00:19:43,200 I get 19.6. 323 00:19:43,200 --> 00:19:44,200 Pounds? 324 00:19:44,200 --> 00:19:45,200 Yeah. 325 00:19:45,880 --> 00:19:51,760 Remember on test one, with just the escaping NOx powering it, the rocket generated 78 pounds 326 00:19:51,760 --> 00:19:55,400 of force, which means something's gone wrong. 327 00:19:55,400 --> 00:19:56,400 Pull this out. 328 00:19:56,400 --> 00:19:57,400 I've just got to look right now. 329 00:19:57,400 --> 00:19:58,400 Nothing. 330 00:19:58,400 --> 00:20:01,400 Salami didn't ignite. 331 00:20:01,400 --> 00:20:02,680 Uh-oh. 332 00:20:02,680 --> 00:20:06,640 It's looking like it's viewers two, mythbusters zero. 333 00:20:06,640 --> 00:20:11,640 The Salami didn't burn, so it's not added any more thrust, which is leaving Adam and 334 00:20:11,640 --> 00:20:15,600 Jamie rather embarrassed. 335 00:20:15,600 --> 00:20:20,640 Coming right up, the boys hit the road for a fuel efficiency revisit. 336 00:20:20,640 --> 00:20:31,320 This test is tailgate up, just like gold time, except we don't have to drive for 600 miles. 337 00:20:31,320 --> 00:20:35,200 Please don't try anything that you're about to see us do at home, ever. 338 00:20:42,640 --> 00:20:47,440 So, tailgate up versus tailgate down, are you serious? 339 00:20:47,440 --> 00:20:48,440 Are we revisiting that? 340 00:20:48,440 --> 00:20:49,440 I thought we nailed that. 341 00:20:49,440 --> 00:20:50,440 Yeah, we did nail it. 342 00:20:50,440 --> 00:20:54,200 I think we nailed it, you think we nailed it, and I believe the general consensus is 343 00:20:54,200 --> 00:20:55,200 that we nailed it. 344 00:20:55,200 --> 00:20:59,120 But when it comes to fuel efficiency, the fans just want more. 345 00:20:59,120 --> 00:21:01,120 They want more tests. 346 00:21:01,120 --> 00:21:02,120 Huh. 347 00:21:02,120 --> 00:21:08,640 The tailgate up versus down dilemma first spawned a driving marathon. 348 00:21:08,640 --> 00:21:11,120 Yeah, it's definitely out. 349 00:21:11,120 --> 00:21:13,320 I'm keying it off over. 350 00:21:13,320 --> 00:21:16,000 Then a water vortex test. 351 00:21:16,000 --> 00:21:18,000 Okay. 352 00:21:18,000 --> 00:21:22,280 Both of which prove that tailgate up is a more fuel efficient way to drive. 353 00:21:22,280 --> 00:21:23,680 And it's right about here. 354 00:21:23,680 --> 00:21:27,720 They're hitting this critical point where I can see them kind of falling off and joining 355 00:21:27,720 --> 00:21:29,880 in with their friends. 356 00:21:29,880 --> 00:21:32,280 But viewers want more. 357 00:21:32,280 --> 00:21:36,720 So the basic gist of it is that the fans feel like there are several tests we did not try 358 00:21:36,720 --> 00:21:40,360 that can potentially improve your mileage on your pickup truck. 359 00:21:40,720 --> 00:21:45,200 Yeah, my inbox is full of them, like driving your pickup with that hard roof cover on it. 360 00:21:45,200 --> 00:21:46,200 Yeah, that's one of them. 361 00:21:46,200 --> 00:21:51,360 There's also, I've been suggested, the mesh in place of your tailgate is supposed to work. 362 00:21:51,360 --> 00:21:55,320 And some of them are suggesting that you even take your tailgate entirely off. 363 00:21:55,320 --> 00:21:57,800 Okay, so that's three tests. 364 00:21:57,800 --> 00:21:59,480 That's enough for us to work with. 365 00:21:59,480 --> 00:22:00,480 I think we should do it. 366 00:22:00,480 --> 00:22:01,840 Sounds like a plan. 367 00:22:01,840 --> 00:22:08,000 The boys are going to test the different tailgate setups at 25 and 55 miles an hour. 368 00:22:08,000 --> 00:22:14,920 To find out once and for all the most fuel efficient way of driving a pickup. 369 00:22:14,920 --> 00:22:17,800 Or more precisely, Jamie's pickup. 370 00:22:17,800 --> 00:22:21,520 The way this works is it's got a flow meter, an electronic flow meter that we've hooked 371 00:22:21,520 --> 00:22:23,560 directly into the fuel line of the car. 372 00:22:23,560 --> 00:22:28,040 So it knows it's not estimating, it's not calculating or extrapolating, it's reading 373 00:22:28,040 --> 00:22:32,280 precisely how much fuel is moving into the engine of the car under each condition we're 374 00:22:32,280 --> 00:22:33,280 going to test it under. 375 00:22:33,400 --> 00:22:38,080 It's a foolproof system and once more it has been pretested. 376 00:22:38,080 --> 00:22:41,960 For anyone out there who wants to email me telling me that we screwed up this test, we 377 00:22:41,960 --> 00:22:47,400 have already calibrated this thing to this car. 378 00:22:47,400 --> 00:22:49,880 So it's going to be perfect. 379 00:22:49,880 --> 00:22:54,600 With the perfect gauge in place, it's time to hit the road. 380 00:22:54,600 --> 00:22:58,560 So for each of these, I think this stretch that you're driving on is perfect. 381 00:22:58,680 --> 00:23:02,960 It's like five miles of straight, flat road when you get all of our speed readings and 382 00:23:02,960 --> 00:23:07,120 fuel efficiency readings on here to start back and forth, back and forth. 383 00:23:07,120 --> 00:23:12,000 And they're going to start by trying to confirm their original results with the tailgate down. 384 00:23:12,000 --> 00:23:18,240 Okay, I'm working my way up to 55. 385 00:23:18,240 --> 00:23:21,640 It should be pretty stable right now. 386 00:23:21,640 --> 00:23:26,320 5.3, 5.2. 387 00:23:26,320 --> 00:23:28,280 I'm real stable. 388 00:23:28,480 --> 00:23:30,000 It's not moving. 389 00:23:30,000 --> 00:23:31,000 5.2, 5.2. 390 00:23:31,000 --> 00:23:34,120 5.2 gallons per hour at 55. 391 00:23:34,120 --> 00:23:40,480 From 55, Jamie slams on their brakes and repeats the circuit at 25 miles an hour. 392 00:23:40,480 --> 00:23:44,080 Okay, 1.2 gallons per hour at 25. 393 00:23:44,080 --> 00:23:45,080 Okay. 394 00:23:45,080 --> 00:23:50,280 A quick pit stop later and it's all changed with the tailgate. 395 00:23:50,280 --> 00:23:56,480 This test is tailgate up just like old times, because I've been on a drive for 600 miles. 396 00:23:56,480 --> 00:24:00,240 They run the circuit once more at 55. 397 00:24:00,240 --> 00:24:05,000 Stable reading of 5 gallons per hour at 55. 398 00:24:05,000 --> 00:24:07,720 Then again at 25 miles an hour. 399 00:24:07,720 --> 00:24:13,440 Well, that seems to confirm our previous results that having the tailgate up is more fuel efficient 400 00:24:13,440 --> 00:24:15,560 than having the tailgate down. 401 00:24:15,560 --> 00:24:18,240 Well, that's encouraging. 402 00:24:18,240 --> 00:24:22,000 So, what's next? 403 00:24:22,000 --> 00:24:26,240 Now that their original results are upheld, the new tests can begin. 404 00:24:26,240 --> 00:24:30,560 And first up, it's on with the pickup cover. 405 00:24:30,560 --> 00:24:33,560 Putting a hard cover on your pickup truck is supposed to be the best thing you could do 406 00:24:33,560 --> 00:24:37,160 to make it aerodynamic and that's supposed to lead to the best fuel efficiency. 407 00:24:37,160 --> 00:24:42,760 A nearly endless number of fans wrote Jamie and I to explain this very point, so that's 408 00:24:42,760 --> 00:24:44,920 why we're doing it. 409 00:24:44,920 --> 00:24:49,200 Once the cover's in place, they drive around in circles some more. 410 00:24:49,400 --> 00:24:53,800 1.2 gallons per hour at 25. 411 00:24:53,800 --> 00:24:55,800 Let's go up to 55. 412 00:24:55,800 --> 00:24:57,800 Okay, and steadying up. 413 00:24:57,800 --> 00:24:58,800 Not moving. 414 00:24:58,800 --> 00:25:04,800 Okay, I get a reading of 5 gallons per hour at 55. 415 00:25:04,800 --> 00:25:09,920 The stats are in, so they head back to mission control, where it's off with the roof as the 416 00:25:09,920 --> 00:25:12,040 cover is uncovered. 417 00:25:12,040 --> 00:25:13,960 And there you have it. 418 00:25:13,960 --> 00:25:15,960 One nice fallout shelter. 419 00:25:16,720 --> 00:25:21,720 Hello honey, there's a tornado coming. 420 00:25:21,720 --> 00:25:25,400 Hold on sweetie, let's go down. 421 00:25:25,400 --> 00:25:29,120 While Adam seeks shelter, what's next? 422 00:25:29,120 --> 00:25:33,000 Next is actually a truck tailgate mesh. 423 00:25:33,000 --> 00:25:36,240 Requires removing this and putting the mesh on. 424 00:25:36,240 --> 00:25:38,400 Well, this thing weighs a bit. 425 00:25:38,400 --> 00:25:42,560 I guess that'd save mileage if it's not on the truck, right? 426 00:25:42,560 --> 00:25:46,480 Well, the fans emailed us and said if we're testing tailgate up and down, we should test 427 00:25:46,480 --> 00:25:48,920 this because this is supposed to be the least aerodynamic. 428 00:25:48,920 --> 00:25:51,440 It's supposed to use the most fuel. 429 00:25:51,440 --> 00:25:55,080 And on the box it actually says it improves the gas mileage. 430 00:25:55,080 --> 00:25:56,840 So we're going to investigate that. 431 00:25:56,840 --> 00:26:00,040 There's a mishmash of information about the mesh. 432 00:26:00,040 --> 00:26:04,920 The manufacturer claims it improves mileage, but the fans disagree. 433 00:26:04,920 --> 00:26:09,560 Luckily, the myth busters are going to put an end to this controversy. 434 00:26:10,560 --> 00:26:15,560 So this is the test for the mesh installed with the tailgate removed. 435 00:26:15,560 --> 00:26:18,560 And two laps later, the info's in. 436 00:26:18,560 --> 00:26:22,560 And that leaves just one final configuration. 437 00:26:23,560 --> 00:26:25,560 Okay, we're good to go. 438 00:26:25,560 --> 00:26:27,560 Well, let's go. 439 00:26:27,560 --> 00:26:30,560 The last test is no tailgate and no mesh. 440 00:26:30,560 --> 00:26:36,560 And after another bout of driving, they have all the data they could ever need. 441 00:26:36,560 --> 00:26:37,560 So where are we now? 442 00:26:37,560 --> 00:26:43,560 Well, now I'm tired of driving and I think we should go back to the shop and crunch all these numbers, 443 00:26:43,560 --> 00:26:47,560 compare them to each other and see what kind of data we actually achieved today. 444 00:26:47,560 --> 00:26:49,560 Okay. 445 00:26:49,560 --> 00:26:53,560 So Adam, we're back at base and you're looking a little confused with that calculator. 446 00:26:53,560 --> 00:26:54,560 I'm not confused. 447 00:26:54,560 --> 00:26:55,560 Hold on. 448 00:26:55,560 --> 00:26:57,560 All right, the results are in. 449 00:26:57,560 --> 00:27:01,560 The most fuel efficient thing you can do to drive your pickup truck is... 450 00:27:03,560 --> 00:27:04,560 Mesh. 451 00:27:05,560 --> 00:27:06,560 Really? 452 00:27:06,560 --> 00:27:11,560 Yeah, actually it was an improvement of almost 5%, which exceeds most of the other things we tried. 453 00:27:11,560 --> 00:27:12,560 Wow. 454 00:27:12,560 --> 00:27:13,560 What about the other combinations? 455 00:27:13,560 --> 00:27:19,560 Well, no tailgate, tailgate up and hard cover were all about the same and tailgate down was again the worst. 456 00:27:19,560 --> 00:27:21,560 Well, there you go. 457 00:27:21,560 --> 00:27:27,560 Yeah, I really, really hope and I'm asking you, sitting at your computer, not to email me about this. 458 00:27:27,560 --> 00:27:29,560 I don't want to do any more fuel efficiency myths. 459 00:27:29,560 --> 00:27:33,560 Yeah, if you don't believe us, go right ahead and drive the way you want. 460 00:27:37,560 --> 00:27:39,560 Two, one. 461 00:27:39,560 --> 00:27:42,560 Later, the Salami rocket backfires. 462 00:27:42,560 --> 00:27:45,560 The Salami everywhere. 463 00:27:45,560 --> 00:27:49,560 But next, it's a barbecue myth buster style. 464 00:27:49,560 --> 00:27:53,560 Always remember, use plenty of lighter fluid. 465 00:27:53,560 --> 00:28:00,560 Now, Carrie, Grant and Tori are going to slice another myth wide open. 466 00:28:00,560 --> 00:28:02,560 So, sword cuts a sword. 467 00:28:02,560 --> 00:28:04,560 Did you guys screw up or what? 468 00:28:04,560 --> 00:28:08,560 No, we actually got it right this time. 469 00:28:08,560 --> 00:28:10,560 Cut to flashback. 470 00:28:10,560 --> 00:28:15,560 In the mega movie special, the team tried to chop a sword. 471 00:28:15,560 --> 00:28:18,560 We go in three, two, one. 472 00:28:18,560 --> 00:28:20,560 Yeah. 473 00:28:20,560 --> 00:28:21,560 Whoa. 474 00:28:21,560 --> 00:28:22,560 Nice. 475 00:28:22,560 --> 00:28:28,560 But no matter what combination of blades they used, they could never get a clean cut. 476 00:28:28,560 --> 00:28:30,560 At first, I was so impressed. 477 00:28:30,560 --> 00:28:34,560 I thought we might have had a slice, but comes down to it, we had another snap. 478 00:28:34,560 --> 00:28:36,560 But the fifth one, we had a slice. 479 00:28:36,560 --> 00:28:38,560 We had a slice. 480 00:28:38,560 --> 00:28:40,560 At first, I was so impressed. 481 00:28:40,560 --> 00:28:44,560 I thought we might have had a slice, but comes down to it, we had another snap. 482 00:28:44,560 --> 00:28:49,560 But the fans now want them to shoot down another sword chopping myth. 483 00:28:49,560 --> 00:28:52,560 So, we actually got a letter from a fan that said during World War II, 484 00:28:52,560 --> 00:28:57,560 Japanese soldiers were cutting through American soldiers' hot machine gun barrels with their swords. 485 00:28:57,560 --> 00:28:59,560 I'll be darned. 486 00:28:59,560 --> 00:29:00,560 All right. 487 00:29:00,560 --> 00:29:03,560 Well, it sounds like we need to dust off the cutting rig and I'll go get a machine gun. 488 00:29:03,560 --> 00:29:07,560 Sounds like you got your work cut out for you, don't you? 489 00:29:07,560 --> 00:29:11,560 Machine guns are the foundation of today's military units. 490 00:29:11,560 --> 00:29:18,560 But could this mandate of modern warfare really be cut down by the humble sword? 491 00:29:18,560 --> 00:29:25,560 To carve out an answer, Grant is first making some modifications to the original sword-swinging robot. 492 00:29:25,560 --> 00:29:30,560 Before, this was just able to match what a human could do. 493 00:29:30,560 --> 00:29:35,560 But for this one, we're actually going to amp it up and make it something superhuman. 494 00:29:35,560 --> 00:29:39,560 Because shearing through a machine gun is a tough task, 495 00:29:39,560 --> 00:29:42,560 Grant's maximizing the robot's cutting power. 496 00:29:42,560 --> 00:29:46,560 With a new pressure cylinder, it'll be packing twice the punch, 497 00:29:46,560 --> 00:29:52,560 which makes it so dangerous that for a preliminary test, the team must retreat to the bunker. 498 00:29:52,560 --> 00:29:53,560 Here we go. 499 00:29:53,560 --> 00:29:59,560 Three, two, one. 500 00:29:59,560 --> 00:30:00,560 Yeah, all right. 501 00:30:00,560 --> 00:30:05,560 That's only at a third of the maximum pressure, a quarter of the maximum pressure. 502 00:30:05,560 --> 00:30:11,560 With the rigs swinging like Babe Ruth, it's time to bring in the World War II weaponry. 503 00:30:11,560 --> 00:30:15,560 What we've got here is a browning 30-caliber machine gun. 504 00:30:15,560 --> 00:30:20,560 And it's got the outside guard, but more importantly, the barrel. 505 00:30:20,560 --> 00:30:24,560 And as you can see, it's pretty thick. 506 00:30:24,560 --> 00:30:29,560 With such a thick barrel, it's looking like the sword will have its work cut out. 507 00:30:29,560 --> 00:30:33,560 But then, Grant offers this myth a lifeline. 508 00:30:33,560 --> 00:30:37,560 Well, supposedly, the reason that they were able to cut through the barrel is because 509 00:30:37,560 --> 00:30:43,560 as these guns were being fired, they would heat up almost to the point of being red or even white hot. 510 00:30:43,560 --> 00:30:44,560 Now let's get this straight. 511 00:30:44,560 --> 00:30:50,560 When a bullet is fired, the gases expelled can reach temperatures of 5,000 degrees. 512 00:30:50,560 --> 00:30:56,560 So it's no surprise that with a rapid-fire weapon, the barrel can become red hot, 513 00:30:56,560 --> 00:31:00,560 making a slice and dice much more likely. 514 00:31:02,560 --> 00:31:06,560 Of course, it's too dangerous to actually shoot the browning to heat it up. 515 00:31:06,560 --> 00:31:09,560 So instead, they're having a barbecue. 516 00:31:09,560 --> 00:31:15,560 The reason why we're starting a fire is we need to get these machine gun barrels at an even temperature. 517 00:31:15,560 --> 00:31:19,560 Run it over to the sword machine and try to cut it in half. 518 00:31:19,560 --> 00:31:25,560 But with Tori in charge of the fire, this method could be just as dangerous as the shooting. 519 00:31:25,560 --> 00:31:29,560 Always remember, use plenty of lighter fluid. 520 00:31:29,560 --> 00:31:32,560 Who put you in charge of the fire? 521 00:31:32,560 --> 00:31:35,560 I don't know, but I'm glad they did. 522 00:31:35,560 --> 00:31:37,560 Where there's smoke, there's fire. 523 00:31:37,560 --> 00:31:40,560 And this little shin dig is no exception. 524 00:31:40,560 --> 00:31:47,560 With a little help from the shop fan and a few more calls, he's hoping to reach 600 degrees. 525 00:31:47,560 --> 00:31:50,560 Does this all seem incredibly dangerous? 526 00:31:50,560 --> 00:31:51,560 Yes, it seems very dangerous. 527 00:31:51,560 --> 00:31:55,560 Just as long as everyone's aware of that. 528 00:31:55,560 --> 00:32:03,560 With everyone aware of the danger, Tori adds the gun barrel to the flames, which is making Carrie even more nervous. 529 00:32:03,560 --> 00:32:10,560 Worst case scenario would be that as the samurai sword comes whipping around, hits the gun barrel, 530 00:32:10,560 --> 00:32:15,560 one or the other, both shatter into a million pieces, and they go into every part of the shop. 531 00:32:15,560 --> 00:32:19,560 Shop catches on fire, burns down. I don't have a job. 532 00:32:20,560 --> 00:32:24,560 Carrie may yet be fired, but it's too late to back out because... 533 00:32:24,560 --> 00:32:26,560 It's done. 534 00:32:26,560 --> 00:32:28,560 Let's heat the gun barrel up to about 600 degrees. 535 00:32:28,560 --> 00:32:30,560 We're going to bring it inside. 536 00:32:30,560 --> 00:32:37,560 We've got our samurai sword swinging rig already to try to give it a cut and see if this revisit has any truth to it. 537 00:32:39,560 --> 00:32:43,560 Three, two, one. 538 00:32:46,560 --> 00:32:47,560 It sounded like something happened. 539 00:32:47,560 --> 00:32:50,560 It was a clean strike, but what's the result? 540 00:32:50,560 --> 00:32:51,560 Wow. 541 00:32:51,560 --> 00:32:53,560 That is a slice. 542 00:32:53,560 --> 00:32:55,560 Yeah, it's definitely a cut. 543 00:32:55,560 --> 00:32:57,560 That's a lot better than I would have thought. 544 00:32:57,560 --> 00:32:58,560 Me too. 545 00:32:58,560 --> 00:32:59,560 Given the thickness of this material. 546 00:32:59,560 --> 00:33:01,560 But it didn't cut through it. 547 00:33:01,560 --> 00:33:02,560 Or it's a slice. 548 00:33:02,560 --> 00:33:05,560 It didn't cut in half, but that's a gash. 549 00:33:05,560 --> 00:33:12,560 The gun may be gashed, but in a complete reverse of the myth, it's the blade that's been broken in half. 550 00:33:12,560 --> 00:33:17,560 So the next step is we're going to stick this back in the fire, try to get it up to a maximum temperature, 551 00:33:17,560 --> 00:33:20,560 and then we're going to go and try to cut it in half again. 552 00:33:21,560 --> 00:33:24,560 Last time they got the barrel to 600 degrees. 553 00:33:24,560 --> 00:33:26,560 Oh, I bet that's over a thousand. 554 00:33:26,560 --> 00:33:30,560 But this time they're cranking the heat up to the maximum. 555 00:33:30,560 --> 00:33:32,560 Oh, it's well over a thousand. 556 00:33:32,560 --> 00:33:33,560 Wow, the 14... 557 00:33:33,560 --> 00:33:34,560 1500. 558 00:33:34,560 --> 00:33:36,560 1600 degrees. 559 00:33:36,560 --> 00:33:38,560 Okay, it looks like it's holding there. 560 00:33:38,560 --> 00:33:39,560 And... 561 00:33:39,560 --> 00:33:40,560 Alright. 562 00:33:41,560 --> 00:33:47,560 With the temperature at 1600, the barrel starts to resemble something out of a sci-fi movie. 563 00:33:48,560 --> 00:33:50,560 Oh my God, it looks like a lightsaber. 564 00:33:50,560 --> 00:33:52,560 So cool. 565 00:33:52,560 --> 00:33:54,560 Alright, let's get this thing cut. 566 00:33:54,560 --> 00:33:55,560 Okay. 567 00:33:55,560 --> 00:33:56,560 We are hot. 568 00:33:56,560 --> 00:33:57,560 No pun intended. 569 00:33:57,560 --> 00:33:58,560 Get in here. 570 00:34:00,560 --> 00:34:03,560 Three, two, one. 571 00:34:03,560 --> 00:34:08,560 Okay, well... 572 00:34:08,560 --> 00:34:09,560 There, here. 573 00:34:09,560 --> 00:34:11,560 The barrel is still intact. 574 00:34:11,560 --> 00:34:13,560 It's got a deep slice. 575 00:34:13,560 --> 00:34:14,560 It's good? 576 00:34:14,560 --> 00:34:15,560 Yeah, it's deeper, but... 577 00:34:15,560 --> 00:34:17,560 It's still not cutting it in half, huh? 578 00:34:17,560 --> 00:34:21,560 Okay, I think just straight heat is not doing it because it's still red. 579 00:34:21,560 --> 00:34:26,560 And if it couldn't cut it at this point when it's soft and malleable and 1600 degrees... 580 00:34:26,560 --> 00:34:28,560 It wouldn't cut it ever. 581 00:34:29,560 --> 00:34:34,560 With the gun still standing strong, this myth is surely looking busted. 582 00:34:34,560 --> 00:34:39,560 On the other side of the break, will the gun get sliced and diced? 583 00:34:43,560 --> 00:34:47,560 And will the Salami rocket shoot for the moon? 584 00:34:47,560 --> 00:34:50,560 In three, two, one. 585 00:34:59,560 --> 00:35:10,560 The Mythbusters have been testing hot barrel against chiseled blade to see whether a sword can really cut through a machine gun. 586 00:35:10,560 --> 00:35:16,560 But so far, it's gun two, sword zero. 587 00:35:16,560 --> 00:35:18,560 So like something happened. 588 00:35:18,560 --> 00:35:24,560 But all is not lost because Grant's just had a moment of imahara ingenuity. 589 00:35:24,560 --> 00:35:32,560 One possibility for another way this might have happened is to heat up the barrel just like you're shooting it and then quench it rapidly. 590 00:35:32,560 --> 00:35:39,560 And if you do this over a succession of times, it will make the metal harder and in some cases, more brittle. 591 00:35:39,560 --> 00:35:45,560 Which would make it easier for someone to cut it or break it somehow. 592 00:35:45,560 --> 00:35:52,560 To put Grant's theory to the test, Tari first reheats the barrel before plunging it into some cold water. 593 00:35:55,560 --> 00:35:57,560 There she blows. 594 00:35:57,560 --> 00:36:02,560 And once chilled, the barrel jumps back from the freezing pan into the fire. 595 00:36:02,560 --> 00:36:04,560 Back into the fire. 596 00:36:06,560 --> 00:36:14,560 After five more repetitions, the barrels all set for test three, for which Carrie has lined up one more change. 597 00:36:14,560 --> 00:36:18,560 I've finally convinced Grant and Tori that we are going to have to give this our best shot. 598 00:36:18,560 --> 00:36:24,560 So we've gone through our inventory and pulled out the strongest best sword we have. 599 00:36:24,560 --> 00:36:26,560 I think it's going to give us our best shot. 600 00:36:26,560 --> 00:36:31,560 It's a souped up sword versus a bruised up barrel. 601 00:36:31,560 --> 00:36:37,560 Alright, brittle barrel, strong sword in three, two, one. 602 00:36:39,560 --> 00:36:41,560 Whoa! 603 00:36:41,560 --> 00:36:43,560 There's a drop of metal. 604 00:36:43,560 --> 00:36:45,560 Kicking, kicking, kicking. 605 00:36:45,560 --> 00:36:46,560 Yeah! 606 00:36:46,560 --> 00:36:48,560 Look it right there, right there, right there. 607 00:36:48,560 --> 00:36:51,560 At last, they've hit pay dirt. 608 00:36:51,560 --> 00:36:54,560 The barrel has broken into four pieces. 609 00:36:54,560 --> 00:36:57,560 But according to Grant, it's not myth confirmed. 610 00:36:57,560 --> 00:36:59,560 And there's three reasons why. 611 00:36:59,560 --> 00:37:02,560 The first reason is that this is not a slice. 612 00:37:02,560 --> 00:37:04,560 The myth is about slicing through a barrel. 613 00:37:04,560 --> 00:37:07,560 This is hitting it and the barrel shattered. 614 00:37:07,560 --> 00:37:11,560 The second reason is under normal operation, this machine gun would have an outside guard, 615 00:37:11,560 --> 00:37:14,560 which we weren't using for our tests. 616 00:37:14,560 --> 00:37:17,560 And the third reason is that I've really amped up this rig. 617 00:37:17,560 --> 00:37:18,560 It is superhuman. 618 00:37:18,560 --> 00:37:24,560 So that amount of force could not be delivered by even an expert swordsman. 619 00:37:24,560 --> 00:37:28,560 So on the Browning machine gun, it's myth busted. 620 00:37:28,560 --> 00:37:31,560 But Carrie wants to try one more thing. 621 00:37:31,560 --> 00:37:33,560 I think we should actually move on though. 622 00:37:33,560 --> 00:37:34,560 I think we should go on to something. 623 00:37:34,560 --> 00:37:38,560 Is there some sort of machine gun or something from the same era that would have smaller barrel 624 00:37:38,560 --> 00:37:39,560 or thinner walls or something? 625 00:37:39,560 --> 00:37:42,560 Well technically it wouldn't be a machine gun, it would be a submachine gun. 626 00:37:42,560 --> 00:37:45,560 But there are smaller barrels like a Tommy gun, which we have. 627 00:37:45,560 --> 00:37:46,560 Okay. 628 00:37:46,560 --> 00:37:47,560 We should try that. 629 00:37:47,560 --> 00:37:49,560 Yeah, let's ruin another gun. 630 00:37:49,560 --> 00:37:50,560 Alright. 631 00:37:51,560 --> 00:37:53,560 It's the last chance for this myth. 632 00:37:53,560 --> 00:37:57,560 Armed with a thin walled Tommy gun, it's back to the barbecue. 633 00:37:57,560 --> 00:37:59,560 It ain't gonna lie, that's hot. 634 00:37:59,560 --> 00:38:10,560 Alright, I'm watching it go up 1200, 1300, 1400, 1500, 1617, 1740, 17... 635 00:38:10,560 --> 00:38:12,560 Topping at 1750. 636 00:38:12,560 --> 00:38:13,560 Alright, cool. 637 00:38:13,560 --> 00:38:14,560 Let's do it. 638 00:38:14,560 --> 00:38:20,560 With the temperature red hot, can this shooter get slashed by the super strong sword? 639 00:38:20,560 --> 00:38:28,560 Okay, here we're going with a modern alloy blade, Tommy gun barrel in three, two, one. 640 00:38:28,560 --> 00:38:33,560 Oh, no way! 641 00:38:33,560 --> 00:38:35,560 It bent it. 642 00:38:35,560 --> 00:38:37,560 No freaking way. 643 00:38:37,560 --> 00:38:38,560 Huh. 644 00:38:38,560 --> 00:38:45,560 The barrel's more crooked than a politician, but even at almost 2000 degrees, there's still no cut. 645 00:38:45,560 --> 00:38:51,560 You know what my feeling is, it is that hot, it's hot enough to bend it by hitting it, and it's still not cutting it. 646 00:38:51,560 --> 00:38:54,560 I don't think you'll ever be able to cut it no matter how hot the barrel gets. 647 00:38:54,560 --> 00:39:00,560 No, I agree. I mean, here you see that, that deflection, it should have been able to. 648 00:39:00,560 --> 00:39:03,560 If it was going to, this is the softest state you're gonna find it in. 649 00:39:03,560 --> 00:39:05,560 It bent the barrel. 650 00:39:05,560 --> 00:39:12,560 And let's not forget that those are the thinnest walls on the smallest barrel using a modern sword with modern alloys. 651 00:39:12,560 --> 00:39:16,560 What they're trying to say is that it's miffed completely and utterly busted. 652 00:39:16,560 --> 00:39:18,560 So, let's cue the wrap up. 653 00:39:18,560 --> 00:39:21,560 So, what were the results you guys came up with? 654 00:39:21,560 --> 00:39:26,560 Totally busted. You can't cut a World War II-era machine gun barrel with a sword. 655 00:39:26,560 --> 00:39:28,560 It's just too thick. 656 00:39:28,560 --> 00:39:32,560 But we do think we found a reasonable explanation for why people thought maybe that you could cut them in half, 657 00:39:32,560 --> 00:39:37,560 and that is under certain conditions. The heating of the machine gun barrel through firing can make it kind of brittle, 658 00:39:37,560 --> 00:39:40,560 and it can shatter on impact with a sword, but it doesn't slice. 659 00:39:40,560 --> 00:39:44,560 So it's totally busted. Nice work. Well done. 660 00:39:47,560 --> 00:39:50,560 The Salami Rocket Revisit is not going well. 661 00:39:50,560 --> 00:39:56,560 So far, it's looking like the fans are right. Salami may be tasty, but Rocket Fuel it ain't. 662 00:39:58,560 --> 00:40:00,560 Nothing. Salami didn't ignite. 663 00:40:01,560 --> 00:40:05,560 But Jamie, bright spark that he is, has had a bright idea. 664 00:40:05,560 --> 00:40:09,560 Our ignition system worked perfectly this last run. 665 00:40:09,560 --> 00:40:14,560 However, we didn't get the reaction with the fuel grain and the gnaws. 666 00:40:14,560 --> 00:40:19,560 That means everything was burning, but it wasn't carried through into the fuel. 667 00:40:19,560 --> 00:40:26,560 What we figure that we need to do to make that happen is actually choke down the nozzle considerably more, 668 00:40:26,560 --> 00:40:32,560 because increasing the pressure in that engine is part of the formula of how rocket engines work. 669 00:40:32,560 --> 00:40:35,560 And on the off chance, you are not a rocket scientist. 670 00:40:35,560 --> 00:40:41,560 All that means is that on the next test, they're going to use an exhaust nozzle with a smaller hole. 671 00:40:41,560 --> 00:40:48,560 Nitrous oxide with a 5-16 inch nozzle and 3, 2, 1. 672 00:40:51,560 --> 00:40:53,560 That's more like it. 673 00:40:56,560 --> 00:41:03,560 More like it indeed, the reinforced nozzle blew out, but there's no doubt they got the ignition they wanted. 674 00:41:05,560 --> 00:41:08,560 There's Salami everywhere. Dude, it blew out the nozzle. 675 00:41:09,560 --> 00:41:14,560 The nozzle gave way, so there's Florida's ceiling Salami shrapnel, 676 00:41:14,560 --> 00:41:19,560 but it did hang in long enough for the rocket to thrust its way into the force meter. 677 00:41:21,560 --> 00:41:22,560 Oh yeah. 678 00:41:23,560 --> 00:41:29,560 That's a hell of a lot of pressure. 218 pounds of thrust. 679 00:41:33,560 --> 00:41:34,560 That's a lot. 680 00:41:34,560 --> 00:41:39,560 218 pounds of thrust. That's three times the force of the Noxolone, 681 00:41:39,560 --> 00:41:44,560 proving that yes, Salami can act as rocket fuel. 682 00:41:44,560 --> 00:41:49,560 But with another tweak to the nozzle size, the boys think they can go better still. 683 00:41:50,560 --> 00:41:56,560 This is Nos Hybrid Salami rocket with a 3-8s nozzle. 684 00:41:57,560 --> 00:42:01,560 In 3, 2, 1. Go! 685 00:42:05,560 --> 00:42:08,560 I think we got more thrust. 686 00:42:08,560 --> 00:42:09,560 I bet we got more. 687 00:42:09,560 --> 00:42:11,560 Let's go see what it reads. 688 00:42:13,560 --> 00:42:16,560 880 pounds of thrust. 689 00:42:17,560 --> 00:42:23,560 It's a heck of a lot of force for such a little Salami, but is it enough to have launched a rocket? 690 00:42:27,560 --> 00:42:32,560 This thing would have taken off like nobody's business if we had had this launched. 691 00:42:32,560 --> 00:42:36,560 It would have exploded mid-air at some point and stopped going, 692 00:42:36,560 --> 00:42:44,560 but with 500 pounds worth of I'm going up, something that weighs under 20 pounds is going up. 693 00:42:45,560 --> 00:42:50,560 So in other words, the Salami rocket rocks. It's myth should accomplish it. 694 00:42:51,560 --> 00:42:53,560 Well, I am really pleased with those results. 695 00:42:53,560 --> 00:42:59,560 The thrust we got from the Noxolone reaction and ignition vastly exceeded the thrust we got 696 00:42:59,560 --> 00:43:02,560 from just the release of the Noxolone. 697 00:43:02,560 --> 00:43:08,560 Yeah, in fact, the results were so good that we maxed out the force gauge and even ruined it. 698 00:43:08,560 --> 00:43:11,560 I'm also pleased to note that I did not screw up the nozzle design. 699 00:43:11,560 --> 00:43:15,560 That the reaction is so energetic, it's more like an explosion than anything else, 700 00:43:15,560 --> 00:43:18,560 and it blew up even our new much stronger nozzles. 701 00:43:18,560 --> 00:43:22,560 I mean, this stuff is confirmed. It's just not an ideal rocket fuel. 702 00:43:22,560 --> 00:43:27,560 Maybe someday when science unlocks the secret, we'll be traveling to Mars on pure mortadella. 703 00:43:27,560 --> 00:43:29,560 But not now.