Denis writes:
No sailplanes, but a sailboat did navigate using rotary masts.
Calypso.
A similar effect is used on an helicopter instead of tail rotor (the
tail is not rotating but side lift is created from main rotor flow
by blowing air through on side or another )
Called a Notar I think.
--
Paul Repacholi 1 Crescent Rd.,
+61 (08) 9257-1001 Kalamunda.
West Australia 6076
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Raw, Cooked or Well-done, it's all half baked.
EPIC, The Architecture of the future, always has been, always will be.
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