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Old Feb 07, 2002, 01:17 PM
stuartaw is offline
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Berks, England
Joined Jun 2001
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The highest I have seen in the shops is the Cosmotech (4.5:1). But listed in "Electric Flight Gearboxes" by Oliver Wennmacher are:
2-stage:
Conzelmann "Volksgetriebe", 5.4:1 and 4.3:1
Ludwig "CNC gearbox for 400 motors", 5.9:1 or less
Planetary:
Gross "Guppy", 6:1 or 5.29:1

I've no idea where these are available from. The author is from Germany, so I would try the mainland European distributors. The book is about 5 years old, so they might not still be around.

Stuart
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