KrAZ-255 6X6 Heavy Millitary Truck (RC)

[ms09]

Hello everyone,

After a long silent time I would like to present my latest MOC: a 6X6 soviet union millitary truck KrAZ-255.

As the 6x6 truck is already a pretty old topic, I am trying to add some innovations in this MOC:

1. Asymmetric axle layout like the real thing,
   
2. Linear actuator driven steering,
   
3. Steering link parts are used to implement drive shaft.
   

The linear actuator driven steering is quite successful and it proves to be more reliable than gear rack driven steering.

The other conventional features include:

1. Two-speed manual gear box,
   
2. Pendular suspension for each axle,
   
3. V4 fake engine,
   
4. Functioning steering wheel,
   
5. LED head and tail lights,
   
6. Hood, doors can be opened.
   

The driving power is provided by two XL motor and steering power is provided by one M motor, one IR receiver is applied.

Size of the MOC is 52(L) X 24(W) X 26(H) and weight is around 2200g. In low gear ratio mode it can climb up the slope of around 20 degree, which you will see in the video.

Layout of real KrAZ-255 drive shaft:

Here come the photos of the MOC itself:

Video link:

Lego cuusoo link

Edited December 31, 2013 by ms09

[Junpei]

W O W! That driveshaft setup is incredible, and probably the first time I've seen mechanical detailing to the level of offsetting the differentials.

Probably not the most perfectly functional model I have ever seen, but it is the most beautiful military truck MOC my eyes have ever seen!

Gorgeous, just gorgeous... :wub: :wub:

[skppo]

Nice job recreating the originals drive system.

Looks like it could use some softer springs though.

Edited December 28, 2013 by skppo

[Technyk32231]

Man this is cool! I've never seen the offset axles in a lego model before.

Edit: Actually I have seen that before.

https://lh4.googleusercontent.com/-OoyFW_Hl89c/UaenM5oHKMI/AAAAAAAAAlk/8BH_zm3psvE/w800-h450-no/DSC02472.JPG

Edited December 28, 2013 by Technyk32231

[haiout]

Very innovative drive structure, learning

[ms09]

W O W! That driveshaft setup is incredible, and probably the first time I've seen mechanical detailing to the level of offsetting the differentials.

Probably not the most perfectly functional model I have ever seen, but it is the most beautiful military truck MOC my eyes have ever seen!

Gorgeous, just gorgeous... :wub: :wub:

Thanks for your comments, I am glad that you like it.

Nice job recreating the originals drive system.

Looks like it could use some softer springs thugh.

Thanks for your nice tip, worth trying when I get some softer springs.

Man this is cool! I've never seen the offset axles in a lego model before.

Edit: Actually I have seen that before.

https://lh4.googleus...no/DSC02472.JPG

Thanks for your comments!

Actually, most 6x6 trucks have the drive shaft in this way, and the driving power of the 3rd axle isn"t from the 2nd axle.

Very innovative drive structure, learning

Thanks for your kind comments!

[Technyk32231]

Thanks for your comments, I am glad that you like it.

Thanks for your nice tip, worth trying when I get some softer springs.

Thanks for your comments!

Actually, most 6x6 trucks have the drive shaft in this way, and the driving power of the 3rd axle isn"t from the 2nd axle.

I know that the power to the 3rd axle isn't from the second axle, I meant the fact that the driveshaft is offset. It's just rare to see this in a lego model, not in real life.

[trekman]

I think this "offset differential" for the rear axles will have a started a new craze for 2014. Just watch this space... Very good model, well done.

[Doc_Brown]

Good to see how realistic this is! Great job.

[ms09]

I think this "offset differential" for the rear axles will have a started a new craze for 2014. Just watch this space... Very good model, well done.

Thanks for the encouragement, I'm looking forward seeing this.

Good to see how realistic this is! Great job.

Thanks for your comments!

[LEGO Train 12 Volts]

What an incredible job!

As already mentioned by TwentyLeggedHen the double shaft is the thing that surprises me most

Outstanding suspension system

Thanks for the great video!

[Technyk32231]

I think the springs need to be rotated 90 degrees. With their current placement, when the axle articulates, the spring will bend.

[Lakop]

Your drive train is inspiring. Good build and good video.

H

[ms09]

What an incredible job!

As already mentioned by TwentyLeggedHen the double shaft is the thing that surprises me most

Outstanding suspension system

Thanks for the great video!

Thanks for your comments! I'm glad you like the drive shaft.

I think the springs need to be rotated 90 degrees. With their current placement, when the axle articulates, the spring will bend.

Thanks for your suggestion! The bending of the current implementation is unnoticeable. Actually I started with the implementation you mentioned but the problem is simply worse. Maybe a complete solution is to give the joint a second DOF.

Your drive train is inspiring. Good build and good video.

H

Many thanks for your comments!

[ms09]

This MOC is just published on lego cuusoo, please feel free to support it.

Thanks in advance!