This project has been kicking around for a very long time. I started this when Pro-Line first released the Masher 2000 tyre, which I think was just before the year 2000, so lets say 1999. Again these were the tallest tyres you could get for a 2.2" wheel. They became the original rock crawling tyre which set the form factor for the 2.2 crawler tyre as we know them today, but originally were sold as a monster truck tyre for such rc vehicles as the Traxxas Stampede. of course I was attracted to both their size and the slightly SciFi look of the tread.
I had an idea to build a 6x6 vehicle loosely based on the cool Explosives truck vehicles in Gerry Anderson's Joe 90.
I was also a huge fan of the Banana Splits show as a kid and always wanted one of those amphibious 6 wheeled skid steer atv's they used to hoon around in the shows credits. Since then I have always tended to go for anything with more than 4 wheels.
Originally I was thinking of a shaft drive system with a left and right shaft driving the wheels on each side, with two speed controllers and motors. Some time later Losi introduced a radical belt drive layout for the xx s touring car and I thought something like this might work and be easier than bevel gears to implement.
Each side is a mirror of the other so one of the motors has to run in reverse. The timing of that motor has been rotated 180 degrees. At the moment I have got two 50 turn crawler motors mounted but may well change to less turns for a bit of extra speed. I was going to run a couple of LRP runner plus reverse ESC's but found they have an annoying amount of delay before reverse kicks in after braking. In this application, so I can Spin Steer I really want no delay reverse. So I am on the lookout for a couple of cheap no delay reverse ESCs.
The chassis is a length of 3mm thick 100mm wide aluminium. The blocks which hold the drive and bearings are made from 10mm thick PVC sheet. Its easy to cut accurately on saw table and drill and tap. It also takes super glue very well as long as the mating surfaces are sanded. All the suspension arms, hub carriers cups and axles are Traxxas rear Bandit gear. The cups and axles are the hardened steel universal joint types. The wheels once again are the Venom Creeper wheels. I originally had Tamiya Stadium Blitzer 2.2" rear wheels but after an order of a couple of Creeper wheel pairs arrived, I found the packs contained 4 wheels not pairs as listed. I had these left over so used them instead. They hold the ProLine tyres quite happily and look way better than the Stadium Blitzer wheels. The other thing to note is the suspension arms are molded with about 3 degrees of toe-in built in so all the tyres point inward at the front.
I had a box full of balsa wood that I've had for years so decided to put it to some use. The 6mm thick balsa bulkheads were glued up onto longitudinal frames with thin zap-a-gap super glue and then covered with thin sheets and thick planks of balsa to build up the varying levels of the hull skin. A solid chunk of balsa was carved for the nose. I actually went through a couple of bottles of super glue on this.
As well as a racing conversion project on the go as well. More soon.