[kaliken]

Way back in 2007- 2009 when the Regolith competition was one of NASA's centennial challenges, myself and a couple other industry folks decided to enter a couple of robots in our free time. Ended up placing 2nd and 3rd.. We ended up right behind Paul back when he was at WPI doing robotics then (and now with BiteForce).

To the best of my memory, all of our drives were fully sealed, both motors and gear trains. Just like FRC we really wanted to keep our drivetrain as bullet-proof as possible. If I recall correctly we used fully sealed Maxon motors as well. I believe they were brushless as well however that part i am not remembering as well.

Plus as Cory mentioned you really are not going to have the ability for convection to cool your motor out on the lunar surface.

My thoughts that the 775pro would likely meet a relatively quick death with the amount of dust kicked up. To my knowledge, the simulant is designed if to have relatively sharp edged particles that would replicate the lunar surface and not the water eroded particles that we typically see here on earth and thus be much more abrasive than normal sand, dirt etc...

Good luck!