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Old Nov 08, 2011, 04:52 PM
Registered User
Netherlands
Joined Dec 2009
16 Posts
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Real Electric Outboard motor 6KW

Guys,

My latest project with building an E-outboard has come to an end.







First trials with my Electric outboard ( 30 km/h ) (1 min 12 sec)




It is an Agni 95 R with a 600A peak power Kelly controller with some HK 6s 5ah Lipo packs. But it makes some noise and it looks like an gasoline outboard, so every neighboor thinks that it is ilegal, ( only electric allowed at the lake )

So I want to go more silent and stealthy so I have a new idea and would like to hear what you people think about it.



http://continuouswave.com/cgi-bin/propcalc.pl
I use this calculator and add 20% slip ( not sure if that is right )


So I want to put one shaft through 2 Turnigy motors and rewind them for 51 RPM/Volt, I believe some people at the forum have done this successfully.
Each motor will get it's own controller, with my Agni 95 R outboard I draw 6000 watt to go 27 km/h which is fine for me, but that was with a gearing and imbalance, so a directdrive should be more efficient right ?

Any thoughts ? Maybe not an Turnigy RC motor but a stock motor that can handle these powers ?
It needs to be a small size diameter motor, the Agni motor is a pancake size and it to wide to put it under water.





I originally posted this at the ES forum, but also would like to share with RC groups since I now want to build it with RC motors, so I was hoping that someone can help me out a bit.

I was think of adding some sort of gearbox to the Turnigy motor to get the prop running at 51 rpm/volt, I can imagine that there are small gearboxes for RC planes and boats, but I need one that can handle more power.

If anyone has some info or an idea please let me know.

Thanks !
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