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Old Feb 12, 2002, 11:08 AM
Ninjak2k is offline
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United States, VA, Warrenton
Joined Apr 2001
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Big prop-low rpm or small prop-high rpm

I just finished reading Jim Bourke's "Understanding Electric Power Systems" articles and feel like an enlightened individual with many many questions that I don't have the answers to.

One that has been bugging me is as follows:

I now understand how you might go about achieveing a particular output power with motor/cell/prop combinations. However, given that you need an output of 500 W, is it better to swing a large prop at a slow rpm or a small prop at a fast rpm? The output power of the system is theoretically the same, so what it the benefit of one over the other?

Thank in advance. I'm finally getting a grasp (maybe) on my power systems.

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