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Roketmini
2008.01.30, 09:13 PM
This is a project I intend to finish.

The inspiration: Dodge T-Rex Concept Truck.
http://www.fortunecity.com/athena/exercise/20/arabalar/tasitlar/Jeep/Dodge-trex-1.jpg
http://www.fortunecity.com/athena/exercise/20/arabalar/tasitlar/Jeep/dodge-trex-2.jpg

I have a number of questions before I start:
-Can I run two stock motors on the stock PCB?
-If not two stock motors, what about 2 Xmod Stage one motors?
-I think the 4x6 has been done before, but does anyone remember where it was?

Comments/suggestions are welcome. No pictures of MY truck...yet. I'll be basing it on an Overland.

Oh, does anyone know what the offset is on Overland wheels? Assuming that the stock is 0mm, I'd like a +1mm offset up front and a +1.5-2 in the back. Also, I can mount normal Z rims, correct? I plan on running Lego tires.

Roketmini
2008.01.30, 09:29 PM
Double post...sorry!
Here's a picture of the Ram I have. I'll probably do a stretch with styrene and filler since I'm too cheap to buy and hack up a second body.
http://i37.photobucket.com/albums/e100/Roketmini/IMG_0260.jpg

HammerZ
2008.01.31, 09:38 PM
I have a number of questions before I start:
-Can I run two stock motors on the stock PCB?

I have run two stock Kyosho motors on my MR015 DSV project. It will push it quite a bit. The lower gearing that the OL has would be easier on it by a little bit. I toasted my 3004 fets on mine, good thing I had my 4562 fets to replace them with. So far I am just running a single layer and it is holding up fine. The "ECO" motors may be something to look into. I wired the second motor right off the first one. Red to red and black to black. A series connection will draw too much load off the fets. It was a Clod forum I read that from, those guys have alot of experiance with multi motors as well as multi packs. Last thing is expect short run times with it running two motors.

-If not two stock motors, what about 2 Xmod Stage one motors?

I always thought the Xmods motors are junk, be better sticking with the Kyosho motors

-I think the 4x6 has been done before, but does anyone remember where it was?

Was it my DSV? Demon Seed Vette? My MR015 RM-HM combo. I see this as an extream example, as the direct gearing of the racers means more load on the motors. That means more amps, and fets go poof. An Overland is a better choice with the reduction gearing though. Good luck with your project, I would like to see more of it.

Roketmini
2008.01.31, 09:52 PM
No, it wasn't the DSV. There was a spanish forum where somone built a 4x6 Hummer H1. I can't recall what it was now, I just remember the suspension setup.

Speaking of suspension, how seriously would it affect the performance if I attatched the 2nd axle to the first directly. Here's a crude sketch of what I'm thinking:
http://i37.photobucket.com/albums/e100/Roketmini/diagram1.jpg
I have round and square brass tubing, as well as some plate. Would it seriously hinder performance if the two rear axles were on the same suspension? For this project, I'd like to have it running before I go nuts after crawling performance.

HammerZ
2008.01.31, 10:06 PM
I set mine up so it can float up and down as well as side to side. But it still tracks straight and the rear box will not rotate with the upper link. I used a brass upper link that will pivot at the ends. The lower plate (like an extended H plate) was made from a sheet of lexan. For the OL, I have no idea how to link it. I think in the Monster section someone linked a second gearbox off the front one. I think you want it to float some, but still track. Like a crude four link setup.

You can set it up rigid like that, but you will find out that the diffs will need locked up to move over any uneven surface at all. Remember with an extra motor back there the rear will be twice as heavy now. The gearbox will have enough weight to get traction all by itself. So you don't need any extra springs or shocks to push it down.

greekone
2008.01.31, 11:56 PM
I've seen something similar done to an x-truck except it was on another forum.

HammerZ
2008.02.01, 07:11 AM
Dug up these links. Enjoy.
http://www.minizeta.com/foro/showthread.php?t=7847
From this thread.