water cooling.

[jeffm912]

I would certainly go with a brushless setup, in boats the brushes wear very fast and the motors aren't the most responsive to cooling. Even cooling the brushes and can isn't enough. I would go with something like a 7l nemesis/ feigao motor and maybe even a hydra 120 or the xpower 100 amp that Steve sells right here. Then something like a x632 prop. That will get you in the ballpark if not dead on.

[phase]

what do you guys think of this system- http://www.offshoreelectrics.com/pro...d=dh-blcomboaq

[phase]

or this one- http://cgi.ebay.com/RC-BRUSHLESS-BOA...2em118Q2el1247

[motoxbob11]

what do you guys think of this system- http://www.offshoreelectrics.com/pro...d=dh-blcomboaq

That is the Supervee system and it is just fine for sport running. It runs on two batteries in series however and I don't know if it will run on 7.2 volts or if you would even want to.

[jeffm912]

The aquacraft setup would be great if you were using 12 cells and the other system is a no go, you can buy better stuff from Steve for near the same price or less and get it in 3-4 days not weeks. The nemesis 7l motor and xpower esc either the 70 amp or for the extra few bucks just get the 100 amp. You will need a seperate receiver pack but most use them regardless to ensure the boat stays in control.

[Rex R]

sv's esc only goes down to 8 nimh cells. imo for an initial setup run the 27t motor with a x432 prop. later on I would consider either a feigao 540 10s or 7l (3500kv) on 7.2-7.4v). that boat isn't gonna like running a hotter kv(yes it can be done but, you're likely to be seeing the underside of the boat alot).

[phase]

can someon please post a link of that moter and esc

[motoxbob11]

Good point by Rex I agree 7.4 volts is plenty for that boat but he also suggests a brushless motor. The 27 turn motor is probably a stock class car motor which will have at least 24 degrees advanced timing and that means even more heat. Gotta start somewhere though so give it a try and post the results.

[Rex R]

iirc that boat was designed w/ the 27t 'stock' motor in mind(it does better w/ a 19t 05 motor) the 27t motor would let him get the boat up and running and get some experience w/ setting up the boat w/o worrying overmuch about toasting things.

[phase]

i actually have been driving boats for a while.. i just never had experience with tuning and props and all of that..most of the boats i have driven were fast so i think that brushless would be better for me..