1:12 MMRS Demonstrator
 

hi all, i am fairly new to the hobby and still working on my 1st scale truck but throught id post my progress. Iv been working on this Oshkosh MMRS Demonstrator for about 16 months now.

This is what it currently looks like.

Re: 1:12 MMRS Demonstrator
 

[IMG]http://i65.tinypic.com/mikhux.jpg[/IMG]

Re: 1:12 MMRS Demonstrator
 

I orignally had a very different construction method but really didn't like the way it was coming a long. I wanted to make it from brass and solder it together but it was proving difficult with limited machening tools avaible, so hears what i had before scaping it and moveing to full alli.

http://i65.tinypic.com/2rfrfoj.jpg
http://i65.tinypic.com/r9pssn.jpg
http://i68.tinypic.com/143pe83.jpg
http://i66.tinypic.com/i6bat0.jpg

Re: 1:12 MMRS Demonstrator
 

http://i68.tinypic.com/1z6tutv.jpg

This is the 1st day i had everything sufficently together to run my 1st test.

A major problem i discovered here was because of my design i had needed to lengthen the dog bones by 2mm and the toque in the drive was snaping them at the joins. As it turns out i no longer have a pic of my shotty workmanship in this case.

Re: 1:12 MMRS Demonstrator
 

http://i63.tinypic.com/2eyufxd.jpg

There are some of the pre-fab parts i found suited my needs

Im useing this RC4WD 1/10 Scale AX2 2 Speed Transmission/Axial Wraith/SCX10/Honcho RWDZ-U0006 and added a 1:3 planetary with a 13 turn 3000kv bushless ( will prob upgrade this in future)

http://i68.tinypic.com/2ntjx2s.jpg
http://i64.tinypic.com/ibmh7c.jpg

Re: 1:12 MMRS Demonstrator
 

This is what i have so far for my mock up in sketchup.

http://i65.tinypic.com/21akdxv.png
http://i67.tinypic.com/20trl6s.png

Re: 1:12 MMRS Demonstrator
 

http://i66.tinypic.com/vnphls.jpg

Im going to be useing these geared motors for the bases of my winches and iv attached the control board from an old servo

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This is the chassis im going with its far better then the last and only took an afternoon to cut as apossed to 3 month on the last
http://i65.tinypic.com/zkhhdg.jpg

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http://i66.tinypic.com/24qtmwg.jpg

Got the wheels and steering done now but my esc blew up so going to get a 120amp this time.

Re: 1:12 MMRS Demonstrator
 

About 2 month ago i started making a new cab and forward out riggers, still trying to figer out how to get the teloscopic booms to work. Prob just go work a linear actuator inside.
http://i67.tinypic.com/15d758o.jpg
http://i68.tinypic.com/oaq0qq.jpg

Re: 1:12 MMRS Demonstrator
 

New 120amp ESC came a few days ago and was finally able to see the truck running

http://i68.tinypic.com/15pmowk.jpg

Ended up having to make a few upgrades like new 20kg steering servos on the front and back and make solid alloy steering arms while i was at it.

http://i68.tinypic.com/203y8k.jpg

Also upgraded drive shaft to stainless steel from brass

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Made a tow hitch for the rear back plate and started on some winch blocks for guilding the cable out of the truck

http://i64.tinypic.com/3449oqq.jpg
http://i65.tinypic.com/124kf44.jpg
http://i65.tinypic.com/oa7odg.jpg

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http://i67.tinypic.com/2n03nki.jpg

New engin Bay currently under construction being held with tap atm and rebuilt some of the under carrage, had to biuld twice i don't have a bender or any thing so turn out crapy. Second time went a different way with it.

http://i68.tinypic.com/22dkbc.jpg
http://i67.tinypic.com/ett83s.jpg

Re: 1:12 MMRS Demonstrator
 

http://i65.tinypic.com/9vi0xl.jpg

Not much happening atm but had the top off to day took some pics

http://i67.tinypic.com/2qd1nnk.jpg

http://i68.tinypic.com/o8a3di.jpg

started getting some parts together for the crane

http://i68.tinypic.com/fxw386.jpg

also just ordered a 3d printer
http://www.ebay.com.au/itm/311777870...%3AMEBIDX%3AIT