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Old Aug 17, 2012, 06:06 PM
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Australia, QLD, Regents Park
Joined Mar 2007
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One thing that is in your bullets is the batteries, the fact is you can use any battery chemistry with any motor, brushless motors are quite happy to run on SLA's and visa-versa brushed motors can run on Li-po.

On the subject of the "heating Issues" if the motor and prop are correctly matched to each other then this should be a non issue, also an outrunner attached to an aluminium bulkhead in contact with the water will have all the cooling it needs.

I would be inclined to use ESCs for motor control regardless of motor as well, relays are an on-off no control of power and probably no cheaper than an ESC.

Nick
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