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8x8 Trial Truck, The Pumpkinator!

Orange Trial Truck 8x8 Power Functions

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#1 Saberwing40k


  • Technic catch of the day

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Posted 14 October 2012 - 12:05 AM

Well, here we are. This is my latest truck, and I call it, due to the color, the Pumpkinator.
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All eight wheels are driven, and the front four steer. Drive is via one XL motor, geared down roughly nine to one. The axles are loosley inspired by a design from Zblj, and are very tough, except for the third axle, which has grinding gears. Suspension travel is not a whole lot, but it does the job, and is fairly compact.

This truck is actually a project I was making for school, and was originally going to be an Oshkosh PLS truck, although this did not pan out due to time constraints. I built this thing in only 6 hours!

Anyway, I got a good grade, which was a good thing :laugh:  .

I may or may not make instructions, and a video. Would anybody want either of those?

Anyway, on to the pictures, and some additional details.

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The side views, showing the roll cage (made out of 32l axles), the suboptimal location of the battery boxes, and the spare tires.

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The underside view, showing the drive axles, the drive motor, and the suspension setup, which is 4 link.

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A closeup of the rear 2 axles, showing the mechanics. The connection to the third axle is rather weak, and the gearing skips. However, it only does this on extreme slopes.

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The front axles. This was the hardest part to make.

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The steering motor. The cabin has no interior, as it was literally an eleventh hour addition.

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The connection from the front motor to the steering axle. The steering clutch sometimes balks, so that's goin to be redesigned.

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The top of the suspension, which is mostly identical for all axles.

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Front view with the lights on.

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Rear view with the lights on.

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The very front, but it's not actually based on any Mercedes...

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Suspension travel.

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Upper limits.

Enjoy, and keep on building!
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Rumble is Red,Frenzy is Blue,
On Decepticon Cypertron,
Poem writes you!

My current project: ETF HTX-380, on Brickshelf, and Eurobricks.

#2 skylinedan


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Posted 14 October 2012 - 12:19 AM

Looks like Henry Ford,s model T on steroids, :laugh:


#3 DLuders


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Posted 14 October 2012 - 02:17 AM

Another "Lego Pumpkinator"!

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#4 Lost_In_Noise


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Posted 14 October 2012 - 02:40 AM

Nice work. Very effective and simple. I'm looking forward to your video. Good idea to use the motorcycle wheels, as they are cheap to buy. On a side note, it looks like your steering setup has a lot of play in it, due to the various pin/axle connectors between the hub and the gear rack. I may be mistaking though.
My relationship is... Technical.



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