From: James Lambden <james@toolboat.com>
To: electricboats@yahoogroups.com
Sent: Tuesday, February 21, 2012 9:58 PM
Subject: Re: [Electric Boats] stupid question about props?
Torque is torque that is true, If you use the same propeller and turn it at the same speed the result will be the same.
However, an electric motor has more torque at lower rpms and has an almost flat torque curve so can turn a larger propeller slower which is far more efficient.
This is the greatest advantage over internal combustion engines.
But if you don't change the propeller, you give up the best advantage of the electric conversion - using a larger, more efficient prop!
James
Propulsion Marine
James,
I had forgot about the ower end tourque curve on the electric Motor, THNKS
I guess the only stupit question is the one I do not ask
Capt. bob
On Feb 21, 2012, at 8:15 PM, Robert Jorgenson wrote:
confused =If I turn the prop at the same RPM with the electric motor as I did with the gas motor the results would be the same if the boat is on same line and weight????where is the confusion ??? torque is tourqe???capt Bob
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