[sanddrag]

Originally Posted by squirrel

(figure up to 50% torque loss to friction with a 3 stage planetary)

Really? You're figuring 80% efficiency per stage? Is that a reasonable assumption? It's been a while since I've played with planetaries. I wonder if anyone has done any actual data gathering on efficiency of the BaneBots planetary gearboxes. It sure would be nice if the efficiency was a little higher than 80% per stage. I'm not thrilled about the loss through a 4-stage planetary.

Anyhow, thanks for getting us back in check Jim. Often times those inefficiencies go unchecked, and can make a big difference in the final design.