[kevin.li.rit]

Originally Posted by superbeano2004

Wow, thanks with all the help guys! Here is what we did last year:

First, we used 4 drill motors with the transmissions to obtain a 4 wheel drive. We figured out that it didn't work very well at all, we couldn't turn worth crap and the trannys kept slipping. We also used 2 of the big 12" pneumatic tires and the 2 other wheelchair tires.

Next idea, we replaced the 2 wheelchair tires with 2 more 12" pneumatic tires. We did this to try to get up the step. Another problem, we did not have the power or traction to get up the step, scratch that idea.

Final idea, completely take off the front two systems and replace them with good ol' casters. No getting up the step but it helped us maneuver a little better. Sigh...another problem, we were not used to the whipping action of the bot so it eventually threw out our battery. Very embarrassing.

So, as you all can see, we had a wonderful time learning what works and what doesn't, but we still haven't found what works. Thanks to all of your help, we should prevail over the dilemma of the drive train.

Thanks a bunch and I hope to see all you guys in upcoming events and meet you guys.

To give you an idea of what works. Here's a simple 2 speed transmision. You'll need an additional reduction after the output shaft but it'll give yah enough power to turn in 4wd if that's what yah want.

http://technokats.org/documents/shiftonfly.pdf