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WIP TT-S12

Posted February 12, 201213 yr

I am currently working on my 12th truck. My goals:

same functionality as TT-S08
4 wheel steering
as low weight as possible
4-link suspension with 9L links

Because new suspension would take a lot of space, I needed to make the chassis as small as possible. This meant using smaller Power Functions components. I decided to use new 88000 AAA battery box and 2x M motor for propulsion. This would also make the truck lighter, so M motors would be enough. I also decided to include 2 driveshafts, like in TT-S08.

First version was built last month. I didn't like it very much, because the battery box would be on top, making center of gravity too high. It would also look very ugly. I did, however, like the new suspension, so I kept them unchanged for the second version.

Brickshelf gallery: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=494211

In second version, I managed to extend the chassis in length a bit, to allow room for the battery box and the propultion motors to be on the same plane. Steering motor and PF receiver are still in driver's place, so there is no interior. I also constructed a simple exterior, so it looks like a proper rock crawler. Weight is 840 grams, so this is quite a success.

When I tested it, I found that CV joints are crap. They can't withstand any torque, so they pop out of their sockets a lot. I also learnt that the truck is too fast for its power. For next version i have to gear it down and work out something with CV joints. Interior would be nice too.

YouTube video:

Brickshelf gallery: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=495999

OFFTOPIC:

I am starting my own Truck Trial blog. Hopefully I will be writting about my and others' people trucks and TT in general. If you're interested, check this link: http://stari89.blogspot.com/

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