Tracked Vehicle Design - help needed

[Seasider]

Hi all,

I want to build a PF tracked vehicle. I've got lots of different size motors and bought a load of large track pieces and the gear wheel but have no idea where to start.

So can someone point me in what direction I need to start with. Where and how do I need suspension ?

If I use a large motor per track what's a good gearing for it? Do I need a clutch gear on there, can I mount the motors at 90deg to the tracks to minimise width ?

I'm after a crawler excavator type vehicle if it helps

Thanks

[ctx1769]

You need to look at Catweasel's 42042 crawler crane http://rebrickable.com/mocs/Catweazel/42042-rc

[M_longer]

Sariel has made a lot of tracked vehicles:

http://sariel.pl/category/military/

http://sariel.pl/category/constructionequipment/

[JohnBS]

Hi Seasider,

I suggest that you look up the instructions for set 8043 (excavator) and set 42042 (crane). Both have well designed crawler chassis and it is no problem modifying them to have chassis-mounted and independently controlled motors (L or XL). I have made both, with these modifications. You may want to gear down the motors slightly (12/20).

There are posts on this forum which document the necessary mods.

Hope that this helps.

John

[Seasider]

Thanks I'll download the 8043 instructions at some point then.