I will be powering my 28.5" PT boat with two brushless motors. They are HG2015-4166 geared motors. These are 4100 rpm per volt motors. They are geared 6.6 to 1 so I figure the no-load rpm to be around 7,800 at the output shaft. They are small and very light but should do the job very nicely. In a boat this size, lightness is of utmost importance. See them here:
http://www.maxxprod.com/pdf/HG20xx-xx66.pdf
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Marine ESCs for brushless motors are very hard to find. I bought these (1 for each motor):
http://www.himodel.com/electric/HiMo...Y-40-OPTO.html
Although these had to be purchased directly from the company in China, it was a very good and straight-forward experience. Lots of email communication from them on the status of the order. I just got them yesterday, 4 days after I placed the order. Very well packaged and protected.
I purchased spade type rudders and stuffing boxes for the rudders from:
http://www.mackproductsrc.com/Power%20p2.htm
I ordered, but have not yet received, my propshafts, stuffing boxes, motor couplers, and propellers from:
http://www.loyalhannadockyard.com/
The props I ordered are Raboesch 30mm diameter 3 blade scale props.
The batteries I plan to use are 2600MAH, 3 cell lithium polymer types, 1 for each motor.
The radio I will use is my Spektrum DX6. The reciever is tiny and virtually weightless. I will only need one servo on the rudder function to make the boat operable.