Steve Hix wrote:
In article .com,
wrote:
Bob Moore wrote:
Reed Judd-Dyer wrote
How does more blades equal less efficiency?
Those of us that flew rubber band powered contest model
aircraft way back ('40s-'50s) KNOW that the most efficient
propellor has only ONE blade...and a counterweight on the
other side. :-)
Bob Moore
A Helo with one blade would have to be the most uncomfortable ride,
until after a minute or so, when it had shook itself to pieces.
quite a bit less than a minute...
The single-blade prop with counterweight actually worked pretty well in
testing.
AND if you look at the model planes that are used in the International
U control speed contests, each has only one wing with fuel inside,
powered by an engine with prop of one blade and counterweight, faster
it goes more Cf on fuel in wing to input to engine, which has funnel
type air inlet to carb. Really screams, and speeds of over 230 klm
hour running in a 33meter radius circle about a heavy pivot in the
center.
Year I saw it at Westover, Mass the Aussie team won it by a healthy
margin.. more than 3% faster than old record..