Torqeedo is probably including prop efficiency in their claim.
From: electricboats@yahoogroups.com [mailto:electricboats@yahoogroups.com] On Behalf Of F Neil Simms
Sent: Friday, May 20, 2011 7:00 AM
To: electricboats@yahoogroups.com
Subject: [Electric Boats] Efficiency of Torqeedo motors at low power levels
Torqeedo claims about 50% overall efficiency for their motors.
Can I assume this is at or near full power level? Is their efficiency lower at low power levels?
When I get my slim boat done I'll be testing it at first with my 801 Base, with the standard prop, and also with a 16x16 airplane prop. I've calculated what performance I should get at low power levels (50 to 100 watts) assuming the 50% efficiency touted, but I suspect it will turn out to be much lower than that.
Just wondering if anyone has ever tested this (low power efficiency) with a Torqeedo and a fast light hull capable of moving at a good clip at low power levels.
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