MUD4FUN
Rock Stacker
After getting loads of great advice, including some excellent articles on this site (including the latest tyre test one) I made some changes to my thunderfoot project.
I removed the foam inserts from my IMEX Swamp Dawgs, I cut off all the smaller blocks to give better bite, I installed a 3.1:1 reduction unit giving me 65:1 overall gearing. I also added lead rings inside the tyres, these are taped around the wheel. I also added lead sheet wrapped around my axles to lower the CoG even futher. I fitted a saddle pack to spread the weight more evenly and I changed the shock geometry to give less torque twist.
The result is in this (poor quality) movie. I don't think it performs too bad for a single motor, shaft driven 2.2" tyres truck. The fence posts in this vid are set at 45 degrees and you can see the back end of the truck squatting down with the torque required to shift its 3.5Kg mass up the slope. The vid also shows it pulling an old victorian house brick which weighs 3Kg.
http://www.rcpics.net/img/38202
I removed the foam inserts from my IMEX Swamp Dawgs, I cut off all the smaller blocks to give better bite, I installed a 3.1:1 reduction unit giving me 65:1 overall gearing. I also added lead rings inside the tyres, these are taped around the wheel. I also added lead sheet wrapped around my axles to lower the CoG even futher. I fitted a saddle pack to spread the weight more evenly and I changed the shock geometry to give less torque twist.
The result is in this (poor quality) movie. I don't think it performs too bad for a single motor, shaft driven 2.2" tyres truck. The fence posts in this vid are set at 45 degrees and you can see the back end of the truck squatting down with the torque required to shift its 3.5Kg mass up the slope. The vid also shows it pulling an old victorian house brick which weighs 3Kg.
http://www.rcpics.net/img/38202