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Author Topic: Brushless for bow thruster?  (Read 938 times)

Tug Fanatic

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Brushless for bow thruster?
« on: April 10, 2012, 09:02:11 AM »

I am making a bow thruster for a tug that would normally use a soft 540 motor driving racing type prop in a 40mm waste pipe:

http://www.modelboatmayhem.co.uk/forum/index.php?topic=1592.msg15848#msg15848

Unfortunately I need to keep the whole istallation as short as possible and also to run the motor at 12v. Would someone be kind enough to recommend a physically small brushless outrunner motor that will turn a slightly cut down 40mm racing prop?

As an aside there is a lot of information about brushless motors & aero props but nothing about boats. Is there a sensible way of using the aero data for boat props?
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nick_75au

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Re: Brushless for bow thruster?
« Reply #1 on: April 10, 2012, 10:05:17 AM »

A 28 mm X 22 mm (KA22-20) 1000 Kv, (try to find a lower Kv if possible) motor will do that, or if you can fit a 42 mm diameter motor that's about 20 mm thick a DT700 or DT750.

Answer to Q2, not that I have found {:-{

Nick
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Tug Fanatic

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Re: Brushless for bow thruster?
« Reply #2 on: April 10, 2012, 12:27:07 PM »

Thanks for the help. Pity about the aero prop info.
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