Mechanical Parts for Consideration

Drivetrain options:

Possible Propellers: http://www.hobby-lobby.com/60mm_r_103_prd1.htm

http://www.hobby-lobby.com/60mm_r_105_prd1.htm

Fiberglass Propeller: http://www.amazon.com/1-34-x-2-06-Composite-Propeller/dp/B000UBZYH8/ref=sr_1_6?ie=UTF8&qid=1303883577&sr=8-6

Complete Drive Unit: http://www.hobby-lobby.com/multispeed_380_boat_drive_83_prd1.htm

Bow Thruster: http://www.hobby-lobby.com/scaledrives.htm

Exotic Ideas:

Ballast (good for stability of a monohull): http://www.hobby-lobby.com/racing_micro_magic_keel_ballast_34979_prd1.htm

Monohull(fasterand lighter): http://www.hobby-lobby.com/racing_micro_magic_hull_deck_hatch_34976_prd1.htm

Jet Drive: http://www.hobby-lobby.com/jetdrives.htm

Very expensive brushless motor: http://www.horizonhobby.com/Products/Default.aspx?ProdID=PRB4017#quickAccessories