GNHBus,
Just curious, when you think RPM, are you thinking of motor speed or prop shaft speed? (I'm guessing motor speed). I'm only bringing that up because we've all got different reduction ratios, so any reference to RPM in motor terms will need to be qualified with reduction ratio for any meaningful comparisons.
It's similar to why we use watts and watt hours for loads and capacities, amps and amp hours don't mean much without stating the voltage.
Eric
BTW, do you have a regular name? I'm not a big fan of cryptic online aliases, unless you're in witness protection or under cover....
--- In electricboats@yahoogroups.com, GNHBus@... wrote:
>
> Based on this great info below,validated by the "pull tests" it becomes
> easy to see how converting to electric propulsion for sailboats @ 3-4 knots
> allows for applying the Instant Torque
> Power Curve to a very efficient propeller at relatively low rpms
> (@1000-1800)
>
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