Tatra

My first Trial Truck with 94mm wheels. Features drive, steering, fake engine and independent suspensions with swinging half-axles. Including building instructions.

The aim of this truck was to participated at the contest organized by Freelug at Fana’briques 2010. The main impositions were : powerful, high ground clearance, small turning radius and full independent suspensions. In order to complete the challenge, I have ordered 2 94mm-diameter wheels,then the building process could start. The axle are the most resistant tatra’s axles I have made, because I used this parts to create the bevel gears, reinforced by transverse liftarms to lock the structure. The 94mm-diameter wheels enable to use portal axles with high ground clearance. The final reduction is 12/20, 8/24, 8/24 so 1/15.

In order to have the maximum of stability on slope, I have chosen during the building process that the Battery Box will be in the frame, in the front for 66/33 wheight distribution. As far as I know, the 66/33 weight distribution is very good for clearing abilities with real off-roader vehicles. To avoid a complex drive-train to give power on the fake engine, I used a simple drive-shaft as real, built with 2 U-joins. Considering the small place I had near the XL motor, I have chosen to build the U-join with a Ribbed Hose as suggested on the official lego patent.

You can find the building instructions here : http://www.brickshelf.com/cgi-bin/gallery.cgi?f=437342