esc which do you recommend

[tondabone]

Hi all
Im new to boats so treat me like a thicko, im need to get a speed controller, im running a 8.4v 700 grauper and im going to run 12 sub c cells through it, i understand this will push 14.4v up it, so im going to water call also, what would you recomend as a speed controller to do the job.

thanks all

tony

[_James_]

acording to graupner, sp700 8.4 motors pull 31amps, so you will need a esc that can hanle over 31 continuse drain... get it? something like the Jeti 450 would do...

http://hobby-lobby.com/jeti.htm

only disadvantage is that this esc doesn't have bec, so you will need seperate battery to power your rx and servos

James

[gulio]

Will the motor be ok at 14 volts....?

[tondabone]

Thanks for the info james,
gulio im not sure if 14.4 volts will kill the motor but some of the articles i have read say it can run on 12 cells, this is my only source of info

Tony

[_James_]

if you water cool it and run a small prop so it doesn't bog down the motor it should be a ripper, but the life of the motor will be decrease i would think, not very much though.

James

[martin richards]

The 700 will take 12 cells and more, with water cooling only becoming an issue at about 16 cells. But I'd think 31 amps a bit low for rating you esc and would have thought 45-50 A closer.
try http://www.offshoreelectrics.com or
http://www.finedesignrc.com/ or
http://www.bbyracing.com/