Tank track are great.
We have had tracks for 10 years. So we know tracks and we know how far to push them.
1) Tracks are great to climb, push, pull, and to control.
2) Tracks are light if made right. they go a fast or as slow as you gear them.
if you look at theses pic's you can see how much power tracks can give you
http://www.valleytech.k12.ma.us/robo...ng%20Robot.jpg
http://www.valleytech.k12.ma.us/robo.../ClearRamp.JPG
Here is a close up of one of our track systems
http://www.valleytech.k12.ma.us/robo...02%20Track.jpg
Bad thing about tracks are if you go past there point of no return they rip
http://www.valleytech.k12.ma.us/robo...s/MVC-671S.JPG
these were Breco Flex timing belts. they have made better belts for us so they don't rip as easy. the cost is $270 per belt. the not so strong belts run around $140
If you want you can go back and look how our tracks have change in the past years
http://www.valleytech.k12.ma.us/robo...photos2002.htm
We left out 1999 becuase that year was a good year of climbing. you have to figure that one out on your own.
If you need anything esle just e-mail me