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good morning everyone i'm yves lamothe

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and I work for the exploration ground

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systems here at the Kennedy Space Center

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the world's pre-eminent launch complex

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for government and commercial space

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access as some of you may know massive

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structure behind me here called the

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crawler-transporter - to put it in

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perspective the crawler-transporter

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is what will carry the mobile launcher

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along with nasa's integrated Space

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Launch System rocket and the Orion

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spacecraft to the pad we are not only do

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we do things big and we do big things

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but we have big news and we're excited

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to share that with you we are getting

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ready to undergo testing where we're

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going to use the crawler transporter the

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V the Vehicle Assembly Building the

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launch control center the pad and a

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crawler transporter to do to do testing

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here at the Kennedy Space Center for the

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first time tomorrow where the crawler

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transporter is going to take the mobile

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launcher to the pad and to talk to us a

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little bit more about the crow

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transporter here I have John Giles who

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is the crawler transporters project

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manager and one of the crawler drivers

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sam dove now folks as we're doing that

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was we're doing this live for you please

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feel free to submit your questions and

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I'll be able to ask on your behalf so

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the kicked things off John can you tell

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us a little bit more about the Karla

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transporter the crawler transporter was

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originally designed and construction

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began back in the early 1960s and large

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pieces of it were shipped here to KSC

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where it was assembled into the crawler

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that you see here now we made its first

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role and approximately mid 1965 and it

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has served well for the Apollo program

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and the shuttle program and then of

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course SLS program will be doing

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everything it needs and the one big

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change after the end of the the previous

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program was we have to be able to pick

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up more weight so so the SLS program

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said they wanted us to be able to pick

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up 18 million pounds on the previous

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amount was 12 million pounds Kennedy

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Space Center and the Ames Research

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Center out in California which they did

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all the analysis and determine exactly

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what we needed to change or replace or

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upgrade on this crawler

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then we started instigating all of those

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those projects things like changing

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putting in new bearings so they could

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withstand the extra weight putting in

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the new hydraulic cylinders so they

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could lift extra weight and some other

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strengthening structural strengthening

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mods okay very well so to get more in

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depth about what the capabilities of the

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crawler transporter is right we're going

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to talk a little bit to Sam dove Sam

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exactly how long does it take you know

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to drive the the transporter from save

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where it is right now over to the pad

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well normal speed which is 0.8 point on

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you can make the trip in probably about

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seven seven a half hours you have a

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number of hours to prepare for things

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that you have before you move and after

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you move when you get to the pad

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generally about 12 hours or so right in

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there if everything goes well 12 hours

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now I imagine is is that one person

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sitting and driving the transporter the

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entire way or is it do you do it in

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shifts no we have a team of

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approximately 30 people and we have some

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NASA folks that go with us as well and

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we taken that driver goes and he drives

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for 35 to 40 minutes and then we have

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people in the control room watching the

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systems controlling the systems a test

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conductor and everybody rotates

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approximately every 30 to 40 minutes and

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that way you're not just stuck on one

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thing and you don't get fatigued that

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way and you can stay sharp and see what

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all is going on with everything that has

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to happen that is absolutely amazing now

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this is such a massive massive massive

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structure you know so is it how exactly

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do you turn this this thing around is

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say you were on your way to the pad and

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you needed to come back what would you

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do in a situation like that well you

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don't actually turn it around

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it just goes one way and we call you

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have two ends on the crawler in one and

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in three and so if you're going to the

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pad you're always going in in three

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direction if you're coming back toward

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the Vav or the crawler yard here it's in

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one direction so if you have to stop and

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come back the other way you don't

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actually do you know the 32-point turn

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to get around the curves they just

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straight out straight back Wow

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now so being being a driver what does it

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take to become

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certified to be able to drive such a

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massive structure well first of all you

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have to have an engineering degree and

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you have to be in the

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crawler-transporter group and then you

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go through an on-the-job training

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program which includes you have to know

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and start as an entry-level person

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coming in and learn all the systems how

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they work how they apply with each other

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how it affects actually certified to

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drop by yourself this is from from

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Instagram the first question is is Sam

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driving the crawl of the entire time at

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what speed how long does it take to get

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to the launch pad and I think you you

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sort of answered those questions already

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right so it's not him the entire time

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their shifts about 30 to 45 minutes it

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goes about 0.8 2.9 miles per hour and it

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takes about 12 hours for us to get you

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know from the VA be over to the pad

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great question take another one the

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question is and maybe John you can

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answer this one is this the same crawler

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from shuttle and Apollo yes we actually

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have two crawlers so these two crawlers

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have handled every program here at KSC

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and we do not exceed point 3 either up

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or down whether we're loaded or unloaded

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and that way it gives the jacking

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equalization leveling system Tom and

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enough time to react and stay level

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because you are still dealing with

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hydraulics and it's not super

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instantaneous you have to give it a

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second to keep itself level so John will

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kind of go back a little bit to design

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right in what this was was intended for

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now at these kinds of speed and the the

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size of this structure how long do you

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think it would take for it to say travel

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from here to the moon ah we had that

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question and so I needed to go do some

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math I went and checked it and we're

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roughly two hundred and thirty nine

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thousand miles to the moon figuring if

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the crawler was going at one mile an

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hour we would it would take roughly 27

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years to get there 27 years that is

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absolutely amazing 27 years just to get

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from here all the way to the to the moon

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actually amazingly large structure and

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again this is how we do here KSC's space

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business is a big business and it takes

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a lot for us to to get from here to to

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deep space so we have another question

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here from YouTube this is a user bow and

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ask how long does the prep time on the

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crawler take and how much grease is used

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will you use quite a bit of lubrication

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the prep time is depends on what you're

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really going to do the mission you're

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gonna do but we replenish all the oils

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the greases lubrications and refill the

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crawler you probably use I don't know

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cup probably a couple barrels of

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lubrication for the tracks you can see

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the tracks behind us and they're a

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little greasy right now - that's a

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55-gallon barrel true and for the the

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pin spray which keeps the pins that you

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can see that hooks the belts together

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that pin spray we usually go through

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about a barrel and a 55-gallon barrel

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and maybe a half permission now earlier

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you talked about a team of about 30

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people that it takes you know - you know

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when when this thing is on the move is

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that 30 people the entire time so I

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imagine there's going to be some people

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walking on the floor there's there's

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some people on the deck there's there's

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people in the cabin how exactly does

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that work well we have observers on the

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ground usually one on each corner to

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help the driver and make sure that we

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don't get over too far or get in any

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kind of trouble in the curves we have

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guys in our Pump Rooms and engine rooms

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and we have guys walking around you know

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laying hands on things making sure it's

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good because you you know you've got

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good instrumentation but you want to

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keep your folks involved because there's

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nothing can beat a person down there

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making sure everything's good and all

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those guys rotate through - they don't

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spend the whole time walking on you know

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on the crawler and they spent time up in

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the engine room the Pump Rooms down on

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the crawl you know down on the side

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watching they spent time on break and

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it's just a continual rotation of people

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now John you know being that you know

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this has been the crawler has been used

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for multi programs throughout throughout

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the many programs here at NASA now if

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for some reason we needed to upgrade the

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crawler transporter tick to carry even

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more weight is that something that's

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actually possible I think

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we would have to do another analysis to

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you know figure out how much more weight

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we could carry but oh sure we can do

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that okay very very well very well all

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right so we'll take some more questions

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from our watchers here we have another

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YouTube question so the question is how

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much does the crawler way well right now

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we're just it's about 6.6 million pounds

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just to hear over that now let me ask

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how exactly do you know that well during

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the mods we actually picked the trucks

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up we had a company come in walked

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underneath and we pick the trucks again

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amazing here KSC we do things big

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alright so we'll take some more

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while you're looking for another one

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actually I could I could tell you back

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on the the laser system even though Sam

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described we don't use a laser system to

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level the crawler we are going to

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implement a laser system that lines us

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up for driving underneath whatever we

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have to pick up so we are going to

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implement that so then that'll give us

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precision alignment because we have to

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be pretty precise when we roll

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underneath things so we can pick it up

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and so it's balanced absolutely amazing

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all right so here we go our our next

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question is I'm from Twitter and Mike

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asked does the chromatin folks keep the

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questions coming in um thank you for

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staying involved this is a question from

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YouTube this is John Burkett asks is is

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the road surface prepped before a load

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carry and I and I imagine that it I

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think he's talking about the the pebbles

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that are that are on the ground here

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yeah absolutely it's condition to every

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time and they pull the gravels out get

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all the hills and valleys out all the

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furrows where people run across it get

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it all nice and level for us and it

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makes a nice nice smooth ride for the

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crawler when it's like and this has to

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be done for every single time that the

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crawler is carrying a load out there

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sometimes we don't because we're looking

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at crawler way things you know we want

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to see how the rocks are holding up

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everything but for every major move and

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for every mobile launch or move every

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move with flight hardware it's always

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conditioned and groomed another question

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from YouTube this is space girl ass when

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will the the tower be moved so as I

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mentioned for the first time tomorrow

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the crawler is going to be picking up

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the the mobile launcher and taking it

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out to the pad to undergo the testing so

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that that's going to be coming up

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tomorrow folks so please make sure you

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stay tuned stay tuned with us the entire

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week as we have so many activities going

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all right this is a question from

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Facebook this is from Peter Mazzy ask

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how does moving the mobile launcher

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tower with the SLS which is the Space

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Launch System compared to moving the

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mobile launcher launch umbilical tower

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with the Saturn 5 on it first when I

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first were out the KSC I was fortunate

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enough to work with some of the Apollo

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guys

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and can I ask how many years ago that

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was you can know I started in 87 I was

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very fortunate to be mentored by some of

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these guys and and they would always

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impart to us you know the stories of

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rollout with the tower and a Saturn fob

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and from what we've seen we've moved the

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mass mobile launcher before it was all

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modified and all outfitted we moved it

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twice already and it'll be very similar

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very similar but we're gonna wind up

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with a heavier rocket when we go with

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that a bigger rocket and the crawlers

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just think about driving your truck down

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the road empty versus having bags of

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cement or mulch in the back or something

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like that it rods a little bit different

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with that weight I suspect it'll be kind

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of very similar the tower will move

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around a little bit just like it did in

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Apollo but the crawler is well suited to

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handle it and I think it'll be a

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successful rollout pretty much the same

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thing very good amazing okay next

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question

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Steve Evan asks how quickly can it stop

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[Laughter]

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first of all it's how fast you're going

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at point none if you stop the crawler

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and for instance just take your foot off

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the gas or you hit what's called an

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emergency stop it will roll

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approximately 20 feet 25 feet if you

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apply the brakes it will stop much

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quicker and we try not to do that

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because we don't want to rock we don't

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want to rock our payload damage the

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rocket or anything anyway so generally

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if you stop you just let it roll to a

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alright ladies and gentlemen we are

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getting some weather warnings here right

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now so we're gonna go ahead and wrap it

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up I'm gonna go ahead and as just one

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last question um before we're done but

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on behalf of km you know the kennedy

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space are here the nesting ground

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systems program thank you so much for

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participating we're very excited to keep

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you in tune with everything that we have

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going on our last question is going to

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be from Jim Thurman and the question is

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why does NASA use those particular rocks

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on the pathway well they did a study of

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course and you have to look at the size

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of the gravel the roundness of the

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gravel and what the makeup of the gravel

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is of the rock and what that does is it

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helps the frictions for steering and

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spreads the support out underneath the

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shoes but mainly it provides you a good

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smooth path to steer the crawler with as

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opposed to being on concrete or asphalt

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and so it helps you when you steer on

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the curves a little less friction it

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makes it a lot easier on the crawler and

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then one other thing too is the the

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crawler doesn't have a suspension system

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it doesn't have shocks and springs like

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a car would so the actual crushing of

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the rock absorbs any vibrations and

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gives gives our payload a smoother ride

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very well very well so folks once again

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thank you so much for tuning in keep the

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questions coming and we'll do our best

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to answer as many of them as possible

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thank you for being here with us and

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being part of everything big that we

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have going on here this is again Yves

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lamothe with the exploration ground

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systems program and we'll see you guys