Hydro???

[Gojira]

whats better a flex shaft or a straight shaft,im building a 23"hydro for 8-12cells any advice would be helpful,thanks

[Rex R]

for sport? or organized racing? for the latter you'ld best check the rules and see if there are restrictions for your class.

[Gojira]

just for sport

[Pagemaster]

Some of the fastest Scale hydros around still use a straight shaft like the real ones. Check them out. http://www.e-rcu.org/


Steven Vaccaro
www.OffshoreElectrics.com

[blizard05]

Hello Seve,congrats on your showing at NAMBA FE nats,good job. Larry

[Pagemaster]

Thanks Larry. I had a ton of fun at the Nats. Counting the days till the 2006 FE Nats!


Steven
www.OffshoreElectrics.com

[Gojira]

anyone have suggestions on a good prop,the boat will be powered buy a 540 size bl motor and 8-12 cells[more than likely 10cells from the beggining] with a .130x3/16 flex shaft set-up , just need a range like 35-40 or 40-43 and sum pitch suggestions thanks

[Rex R]

I gather from my reading that one shouldn't exceed the motor dia(at least for a starting prop. not sure about surface drives tho,think you can go some larger). course the dia of the stub shaft will limit your choices.

[Fluid]

A bit late, but prop selection depends on the motor size and the motor Kv (rpm per volt). A lower Kv motor will usually allow the use of a larger prop, a high Kv motor is used for racing and usually needs a smaller prop. Let me know the exact motor type and Kv and we can make better recommendations.

[Gojira]

the motor is a faigo 540c 9L with 3345kv ,on 10 cells no load rpm should be around 40,000rpm,from what i have read i should start off with either an x437 or x438 but any advise would still be helpful P.S. i lied im using a .150 flex cable

[Hydro Junkie]

That's a lot of power for a 23" boat. You might be better off building one in the 28" to 32" range