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Author Topic: what motor ?  (Read 1135 times)

stag707

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what motor ?
« on: December 17, 2012, 08:14:24 PM »

Hi All
I have just started building Graupners Rau1X and the instructions suggest
Using a Decaperm but my pockets arenít that deep I thought about using
A direct drive 545 any help will be appreciated can be 6 or 12 volt
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malcolmfrary

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Re: what motor ?
« Reply #1 on: December 18, 2012, 10:38:53 AM »

Probably a generic 5 pole 700 type rather than a 545 would be a better equivalent.  A 545 (or a 540) would probably need a gearbox.  Having a browse in the forum should throw up some answers.
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"With the right tool, you can break anything" - Garfield

inertia

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Re: what motor ?
« Reply #2 on: December 18, 2012, 11:17:55 AM »

The Decaperm was a decent enough motor in its time but has been superseded by better and cheaper alternatives. I would fit either a geared MFA Torpedo 500 (£20-ish) or a direct-drive Graupner Speed 720 Torque (£40-ish), both running at 12v.
DM
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stag707

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Re: what motor ?
« Reply #3 on: December 18, 2012, 08:14:43 PM »

Thanks guys its like a minefield out there :-))
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john s 2

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Re: what motor ?
« Reply #4 on: December 18, 2012, 09:08:27 PM »

Not really a minefield. More spoilt for choice. There is in my opinion no exact science.Some want speed others long run time or torque for towing. So often advise can vary. John.
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stag707

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Re: what motor ?
« Reply #5 on: December 18, 2012, 10:29:07 PM »

Not really a minefield. More spoilt for choice. There is in my opinion no exact science.Some want speed others long run time or torque for towing. So often advise can vary. John.
Ok perhaps a minefield was the wrong word, but thats what this forum is all about , you get good advice, I wanted a cheaper alternative and members responded with options and thats exactly what I was looking for. I have an old kit  and things have changed a lot from when this kit was being produced. What motor would you suggest ? model length 40" beam 7" weight 11lb prop size 3" Require scale speed with a bit extra to get out of trouble, running time required no more than 2 hours 6 or 12 volt
 
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