Recent content by Don Pournelle

Thanks a lot for that advice!

Wow. I might eventually need 20kw + motors for a full sized version of an experimental aircraft: Login • Instagram I had assumed that would use off the shelf motors, but maybe you could make custom motors to match my 5-bladed variable-pitch rotors if it turns out that a good match is hard to...

Thanks a lot! My questions are looking far ahead, but I think it wise to know as much as possible about where I’m headed. So I’ll check out all those components you mention. Can you advise a rough guide as to the efficiency of regenerative braking I might get from motor control systems? And...

A bit off topic, but you might have advice for a rather long- term project with similar power requirements: The small model shown at Login • Instagram One big enough to carry me requires at least 40 kw for hover, and power-failure safety requires several kw of regenerative capacity driven by...