I have a few questions reguarding a boat that im building. im making a mirco patriot and using a 400 7.2v graupner motor.

*how much speed could i sqeeze out of it with a 2s 1300mah lipo
*where can i find small plastic or carbon props. cant find small ones anywhere.
*about what size prop should i use. i was thinking 27mm but i dont know for sure

thank you very much for any help