"Thom Stewart" wrote in message ...
| Oh Bull **** Pete
|
| You posted; "Reduction gearing has EVERYTHING to do with it."
|
| It seems you've elected to ignore, Prop Pitch, Prop Size, and the Medium
| it is operating in. You have also neglected to recognize throttle
| control
|

Other things being equal a larger prop with more pitch and lower
gearing is more efficient and delivers more drive per BTU of fuel
used. A one bladed prop would be most efficient but there is
a problem balancing such a thing. Three-bladed props seem to be
a very good compromise for powering sailing yachts with their
inherent slow velocity through the water.

Paladin

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