MONGO - built specifically to steal exotic cars off a speeding train
 

A collaborator and I have been brainstorming this build for over a month now. Many ideas were thrown around like a true hydraulic steering system and custom axles. In the interest of motivating myself to get this build going I decided to just start this thread and start bending some tubes - focusing on the chassis first. Eventually a 2nd chassis will be built for rock racing but the first one will be strictly for slow crawling.

The inspiration is the Mongo from the movie Fast Five
http://gallery.me.com/prifral/100165...13140712380001http://gallery.me.com/prifral/100165...13140712280001http://gallery.me.com/prifral/100165...13140712190001http://gallery.me.com/prifral/100165...13140712100002http://gallery.me.com/prifral/100165...13140711850002

Thanks JS412 for working out the CAD for the cab
http://gallery.me.com/prifral/100165...13140702240001

Body paneling is pretty sparse but every attempt will be made to conceal all RC objects ie. servo, tranny, battery etc.
Tube material will be 3/16 OD x .0375 wall chromoly for the mains and 3/16 OD x .020 wall stainless steel for support.

Tube bender here i come......

That thing looks pretty massive, I can't imagine it'll be too hard to hide stuff.


You going to include a fake front diff cover too? :ror:

it'll be 4x4 so no fake diffs:)

Lol Damnit I wanted to build this

Sent from my HTC EVO 4G using Tapatalk

cant wait:shock:"thumbsup"

that thing is wild looking

Awe man now I'm pumped! Time to get on SolidWorks again!

is it done yet?? lol haha i havent seen that movie yet but that rig looks cool its definitely one of a kind.. haha

since its been 1hr 20mins got any updates?? lol

im watching cant wait to see the finish

ditto, lol.



in for a sweet build.

If its anything by 'Tumbler's standards, this is going to turn out Sick!

Subscribed!

I saw the movie, but i gess, that it will be more fun driving the RC version then wathing the movie "thumbsup"

Subscrived!

In for updates! :ror:

Can't wait to see what your up to.

Wow, this is going to be cool.:mrgreen:

<iframe width="560" height="345" src="http://www.youtube.com/embed/dZmi1AuLk4c" frameborder="0" allowfullscreen></iframe>

The mystery of the half bald tire has been solved. Thank you justinart. "thumbsup"

here is a little tease for the initial CAD mock up. This one was tossed around for the rock racer. And yes you can fit a 1/10 exotic car on the bed. :D

L: ~27"
W: ~12"
H: ~12"

http://i1177.photobucket.com/albums/...hassis19V2.jpg

:shock:

well it is ment to steal cars off a moving train after all... :ror:

I'm loving the flinstone style drive train!

SS on the left 4130 on the right. at 4 inches the SS is .2oz while the 4130 comes in at .4oz. Vital info for keeping things as light as possible.
http://gallery.me.com/prifral/100165...13141598300001
Some test bends while I calibrate my bender. Though requiring alot more force to bend, the 4130 actually bends tighter than the SS.
http://gallery.me.com/prifral/100165...13141598550001
This is the first test run of one of the most complex bends on the rig - the side hoop of the cab. This was done out of the 4130. Spent a lot of time measuring lengths/angles/radius because detailed notes now will allow this component to be duplicated faster/easier later on.
http://gallery.me.com/prifral/100165...13141599080001

oops should have put the dim on there my bad...:shock:

This is gonna be good! Can't wait to see the finished truck.

Hmm? Wonder what axles you're gonna use?
http://gallery.me.com/prifral/100132...13089667640001
Narrowed Wraith ones perhaps? :shock:

Loving the progress so far!! Awsome fabrictaion!"thumbsup"

Yea - if i decide to go with the Wraith axles they'll definitely be chopped cuz the stock width is just ridiculous for a crawler. Specially places like the GP, full width axles would never fit in the "canyons".

Thanks!

Had some free time today and made progress on the cab side hoops. I reversed the order of bends from the original trial hoop in order to alleviate the interference with my bender on the last bend. Also adjusted some of my bends marks to compensate for the material thickness.
http://gallery.me.com/prifral/100165...13145035180001
http://gallery.me.com/prifral/100165...13145035200001
http://gallery.me.com/prifral/100165...13145042490001
http://gallery.me.com/prifral/100165...13145035380001
4 hoops - enough to do 2 cabs
All thats left is chop, notch and join the ends
http://gallery.me.com/prifral/100165...13145034830001
http://gallery.me.com/prifral/100165...13145034820001
This chromoly tubing is a joy to work with - wished it wasnt so heavy:twisted:

What in the hell kind of bender do you use? Those are some clean bends right there! Looks like a machine did it.

This is going to be a awesome build to see finished! Ill be keeping a eye on this thread.

x2 I need a good bender. "thumbsup"

im using a home built bender w/custom dies and ball bearing pivot. Its still under development cuz every so often i come across a bend that challenges its swing clearance. So definitely no machine invloved here:) just a crude bender and lots of measuring & marking

Your bending skills amaze me every time :shock: . Can't wait to see this rig come together. "thumbsup""thumbsup" All your rigs have such clean lines.

only had time for a couple of notches and brazes tonight
http://gallery.me.com/prifral/100165...13146781030001
since all the alignment and measurements from this point on will be based on these two hoops it was very critical to be sure that these hoops be exactly the same in every dimension and absolutely flat when laid down. ill double check the flatness on a surface plate tomorrow.

You're quite the craftsman prifral. Can't wait to see this build come together.

o_0 AMAZING.... I just joined to post on this, Mongo has a 502v8 and 18 inches of suspension travel.
Just plain awesome work man, I will be watching this one.

Autoblog linked inside line's story on it, a couple close up shots in there.

http://www.autoblog.com/2011/04/18/v...ast-five-cars/

Man Im back from my vacation....you said it'd be a roller by now ! ;) Cant wait to see this thing. Great start and clean precise work as usual Prifral =)

Show us a pick of that bender.......:mrgreen:

this. is. gunna. be. AWESOME!

Lol Rich. I know I faked on yah. All I have to show for it is a pile of scrap chromoly tubing. Been busy w/other stuff plus we had some scaling issues. Had to go back to the CAD and re-size it to this monstrosity!
http://gallery.me.com/prifral/100165...13156122920001
When all is said and done the Mongo should be able to carry that Mog on its flat bed:)

We've also been working on our hilux bracket. This is our first proto on Jensen's rig. It ended up way too thick and rigid
http://gallery.me.com/prifral/100165...13156122680001
This is our second go. Less carbon fiber = just the right amount of flex
http://gallery.me.com/prifral/100165...13156122790001

So yeah when your jet lag wears off - WE CRAWL!

What kind of bender do you use?

I want to know more about this bracket!! "thumbsup"

Did you use a top hat section (roofing beam) for the mould?