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Old Apr 08, 2002, 04:55 AM
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Hervey Bay, Sunny Qld, Australia
Joined Jun 2001
1,793 Posts
Promax 4011 with 3.7:1 g/box in a HLG


Just a quick enquiry about if it's worthy of putting a promax 4011 in a HLG with a 3.7 : 1 gearbox swinging a 11 x 7 prop.

I have a Robbe planetary gearbox with the Robbe power 4.8 volt sp 400 motor, but I'm hoping to change the motor to a promax 4011 (since the mounting holes are the same as a sp 400) as mentioned by modifying the motor shaft pinion in the gearbox with a slightly larger hole to accomodate the 3.2mm shaft of the promax 4011.

Also being a HLG I'll want to keep things light, so what would be the best batteries with this motor set up. I believe that the 600maH batteries used for sp 400 won't handle the current draw. Is this true and if so what batteries would be better therefore?

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