4x4 advanced chassis for middle scaled RC cars. WIP

[rm8]

I like building awd remote controlled cars in middle and small scale. Building big scale cars take much time and details. And the second problem of big scale - it cant drive duo to high weight.

My Middle scaled mods/mocs of 9395 and 8081 have very simple transmission with diffs, that cannot be locked. Now i am going to make new middle-scale chassis using new 2xL motors with some advanced features:

1) live axles

2) possibilty to run fast or slow with more torque

3) lockable rear diff

4) awd/ rwd switcher (not realized yet)

5) wide of axles 13-15 studs max.

In my mind middle scale is 62,20 wheels or 68,8 balloons.

Iam going to build on my chassis scale model look cars. But first I want to develop strong and effective chassis.

First I began from rear axle. As you can see diff can be locked.

Next step was making middle part with motors and gearbox. After that front axle appeared.

For now I have:

Front axle suspension kinematics needs improvements

Up p: motors work from 12 to 20 teeth

At the bottom L shaped black liftarm - is gearbox gear holder.

After previous gear (12:20 from motors) next gear can be manually selected again 12:20 or back 20:12. Low and high modes.

Low gear mode for obstacles

High gear mode for faster speed

Changing gear stage: L liftarm is dismounted, after that I move 12 and 20 gears on the axle left or right for needed gear, and then fix gear by L liftarm.

I have made some test with big (96's) and small (62 and 68) wheels.

transmission is strong with such big tires, so I hope it will be strong enough for 1 kg weight (with body) with

fsmaller tires.

Dromt wheels dpfall down because U joint axles is too short to hold such big and heavy tires, but good for 62 and 68

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Edited January 19, 2013 by rm8

[piterx]

it seems really cool! even if i didnt get how steering works exactly :P

[rm8]

there is no steering yet.steering is locked for tests

[piterx]

aaah ok :D eheh