Will a brushless sensorless Astro 05 1T work in a boat?

[GregG]

I just recieved an ABS hull from a friend trying to get me into boating. It's a three point hydro and is made by Randy of Blew Bye You Boatworks. I stopped by the shop in Concord and he said they raced them in a 7 cell hydro class. The boat there I looked at had a ferrite car motor installed and Randy said I could use any motor for the race, even the brushless type.

I have an Astro 05 BL sensorless that was meant for the 7 cell F5D pylon racing planes. Will this motor work in this boat? If so, what prop and what speed control would you recommend?

Thanks,
CobraJet@ecis.com

[Andrew Gilchrist]

Greg

the Astro should be fine with an Octura X432 prop

water cool it - a 5/32 aluminium tube coiled around the motor

you will need a grunty controller 70 amps to handle the current it will pull or you could go to an Octura X430 or X427 and get away with a 50 amp controller


Would I be correct in assuming the hull is a volcanic splash?

[GregG]

Thanks for getting back to me so quickly Andrew. I was in a hurry when I talked to Randy so I forgot what he called it. I measures 12.5" wide by 21.5" long.

I was hoping to pull about 70 amps out of the Astro. Water cooling sounds like a good idea. I know this is asking a lot but will this be a competitive combo? What kind of speeds should I get out of it? Should I use a flex drive or a straight drive shaft. Where can I get a bunch of props to play with?

[Twmaster]

Originally posted by GregG
I was hoping to pull about 70 amps out of the Astro. Water cooling sounds like a good idea. I know this is asking a lot but will this be a competitive combo? What kind of speeds should I get out of it? Should I use a flex drive or a straight drive shaft. Where can I get a bunch of props to play with?

Hi Greg,

Water cooling is going to be a must if you want the motor to live. That hull and motor combo should be quite fast, that combo and good driver skills should be quite competitive. You should use a flex drive as that will allow more adjustments to trim the boat. Randy should have all the hardware you need. Otherwise you can get the hardware from Ray Fuller http://drcwebservices.com/ffe/Default.htm or Chris Fine http://www.finedesignrc.com/default.htm Both will also be a good source for Props and all the other goodies you will need to complete the hull.

Good luck and have fun!