Although weight is the primary consideration, this motor will be on a long extension, so I guess even in space inertia will be a consideration. I see the use phase of this exchange has passed. Gus > On Oct 16, 2009, at 9:28 AM, Russell McMahon wrote: > >> Clearly the very best results are to be had in space where weight >> ~= 0. > > Or in free fall. Or in ballistic trajectory. > You may have noted that I changed the metric to "mass" when I replied. > > > Russell -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist