A brush type DC motor's rpm is determined by the voltage. It pulls an many amps as it takes to turn that rpm against the propeller load. If your motor is rated at 45 amps continuous operation you get the most power by loading it so that it pulls 45 amps. You control the load by propeller diameter and pitch and rpm (which you control with pulley ratio).
On 4/26/2011 7:06 AM, Roland Kruijer wrote:
Hello Dennis,
Thank you for your reply. I'm going to go back to the original rpm pulley ratio to see if that works. Also I will look at the amp draw of the motor. If I understand you right, I should get 45 amps when the motor runs 1100 rpm, right?
The wires get a liitle warm but not that much. You think that this means there is some resistance in the wires. Does this really
make such a difference, or in other words, can this take away that much power?
Thanks so far,
Roland
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