Original Post Below
8.4mm Parkzone Um-P51 motor
home built flex drive
Kyosho 15mm prop - standard pitch (high pitch after testing)
custom wedge rudder and control linkages
custom (sealed) balsa outrigger hull with carbon fiber main strut
what ever battery has the proper connector
First Test: The coupling lost grip on the coupling shaft so I'll just add a touch of glue to it to hold it. It plained off after a foot of travel.
OMG ITS FAST AS HELL!!!!!! I MEAN ATLEAST 15MPH!!!!!!
Since then it has gone brushless (original post below):
If anything, I would say too heavy. I don't like comparing, but my little rigger ran sweet with an ar6400 brck (3.5g), a 1015 inrunner (5g), parkzone micro batteries from 90 to 120mah (3-5g), xp3a esc (1g), plus the weight of the (lightweight balsa) hull and drive gear. At times it couldn't turn because the sponsons lifted off the water. But that is just my thought.