Lego Technic MOCs by 07jkearney

[07jkearney]

So, having been a 'lurker' on this forum for some time, I thought I'd make a thread to share upcoming MOCs, and to gain insight into design problems from an amazing community. Expect infrequent updates of zany incomplete MOCs, which usually end in failure , but I have fun, and I hope you will enjoy following my projects.

All MOCs that I have built up until this point in time are displayed in videos on my YouTube channel, so have a look if you feel like it.

I will kick off this thread with a project that I have been working on recently, a crawler with a suspension design based around these turntables:

It has 4 wheel drive and is propelled by one XL motor, with drive transferred through the turntable using a differential. and through a 2 speed manual gearbox, the steering is done by a medium motor. The two gear ratios are 1:5 and 1:8.34

As you can see, the chassis flexes substantially due to the suspension design

But it goes, and has good crawling abilities due to large suspension travel:

Its main flaws are torsion of the main body section due to the suspension not being stabilized, and the gearbox disengaging under high torque. If I built it again I would leave out the gearbox and brace the suspension from both ends. Below is a video showing it in action:

http://www.youtube.com/watch?v=zuKj1Bs-SB4

More pictures on brickshelf

Comment what you think, and feel free to ask questions or request any additional photos

More WIP MOCs to come in time

[Alasdair Ryan]

I would add more bracing in the middle part.

[07jkearney]

The middle part is structurally sound, the vertical play originates from the turntable parts. The solution to this is to link the extreme ends of the chassis to the middle section. But thanks for the advice :)