Hello!

This moc was made a while ago (last year), but I realized, there is no topic about it yet. I wanted to make a heavy and fast trial truck from Zis e134.

Original model:

My version:

folder: http://www.brickshel...ry.cgi?f=496827

Basically, it was built for truck trial race, so it has a "propulsion motor/weight" ratio, each RC buggy motor carries ~ 1 kg. There are 4 buggy motor built in, each axle has one. Only two gearings (40:8 and after that a 24:8 reduction) are in the drivetrain in each axle, so I hadn't problems with efficiency. Total wieght became 4190 g. I used 1957 parts to build it. It's my longest and heaviest trial truck yet, total length is 610 mm (width: 283 mm). The 4 motors give enough power to reach 1,7 km/h top speed (flat surface), I used two RC units to power them.

I think the most important part in these 8x8 trucks is the suspension. I tried to make a long travel one, which allows the wheels to make contact with the ground in extreme terrain also. The rear axles are built in a unit, which has a linkage (see pictures). This unit can bend also, but not sideways. The two front axles can bend sideways, and lenghtwise also. So without springs, the suspension does it's job:

The second and third axle are connected together with these bars. They seems weak to here, but I can say, there weren't problems with those during the tests and races. They don't hold the axles, only make positioning, but of course, some force can be appear:

Bottom:

I made some details, like net in the driver's door, flags, grilles to the front:

This truck was able to drive in heavy snow. Pictures:

http://www.brickshel...y.cgi?i=5398922

http://www.brickshel...y.cgi?i=5398926

http://www.brickshel...y.cgi?i=5398931

http://www.brickshel...y.cgi?i=5398933

http://www.brickshel...y.cgi?i=5398940

http://www.brickshel...y.cgi?i=5398970

http://www.brickshelf.com/cgi-bin/gallery.cgi?i=5399011

http://www.brickshel...y.cgi?i=5398941

VIDEO:

SNOW VIDEO:

Hope you like it.

Edited November 16, 201311 yr by Mbmc

awesome! one of the best trial performances of a Lego truck i have ever seen!

and in addition the model looks very good.

You have too many power puller wheels.

You should give some to me.

Looks great! Can't wait to get to a computer to watch the video!:-)

Awesome 8x8 truck,do you find that it is quite staple because you used power pullers?

great job...

time to send Lego vehicle in MARS :)

Great truck. Where did you get all those power puller wheels? What else is it capable of, will it pull a good amount of weight.

H

Looks really nice!

Thx guys.

Where did you get all those power puller wheels?

You have too many power puller wheels.

You should give some to me.

I have only 14 PP wheels, for my 16x16 plans I need two more. I had bought a 8466 wheel set from ebay, and I have 4 from 8466 too. Other wheels came separately during the years, the patterned ones are from the power puller.

Only the 8 wheels weight 1485 gramms.

will it pull a good amount of weight.

I never tried, but it's very likely.

do you find that it is quite staple because you used power pullers?

Yes, I found, the additional stability is a big advantage of the heavy PP wheels. Without those the center of gravity would be much higher because of the RC units close to the "top".

Awesome! I had a go at a 4-buggy motor Trial truck but it was so powerful It stripped my gears(especially 12t), in the future I plan to make a stronger, simpler version of it. The suspension you made is incredible!

Awesome truck, the suspension reminds me a lot of Sheepo's (?) Lizard trial truck. I know the power pullers are huge, but I guess never until now did I realize how ridiculously wide they are, they make the vehicle seem very stable.

Also, only 14 power puller wheels? That's 14 more than I have!

Great!!!

What about swiming?

Just Flawless!

Very mechanically sound indeed! But in comp this thing could be a little unfair . I am actually surprised at how well it moves, I was thinking buggy motors would make for a bad crawler because of friction, but nah I was wrong. How does the radio control step acceleration feel, can you pedal this truck in low traction circumstances?

What about swiming?

Like an amphibious vehicle with the air inside the tires? I bet it would sank. 4,2 kg own weight is too much for 8 PP wheel's lifting force.

How does the radio control step acceleration feel, can you pedal this truck in low traction circumstances?

I'm not an english genius, so if I understand well your question: the step controller gives advantage, you can drive also slowly through risky stages or similar terrain. The truck's dynamism also helps, in this speed and weight that also matters a bit. In low traction stages the spinning of wheels in third step on the controller can help.