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Old Dec 05, 2013, 03:31 PM
Registered User
United States, NH, Amherst
Joined Aug 2013
3 Posts
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Rascal 40 Convert

Looking to convert a Sig Rascal 40 (72" wing) from glow to electric. Tired of the fuel mess and temperament engines. Not having much luck with any 2 cycler installed upside down either. It's a great aircraft otherwise and interested in Plan B.

Reading the threads and my head is about to explode. LOL Any help in powerplant/battery/prop size is appreciated.
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Last edited by BigStick63; Dec 05, 2013 at 03:47 PM.
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Old Dec 05, 2013, 03:53 PM
Registered User
United States, MN, St Michael
Joined Apr 2010
55 Posts
I am flying the Rascal 72 that is electrified. I'm running a Rimfire 32, Castle 75amp ESC, with a 13x8 prop. I am running anything from a 4s3300 up to 4s 4400. I also have the medium motor mount from great planes...made for the Rim Fire motors.

On 4400 with throtle management and using the wind to glide some, I can fly for nearly 20 minutes.

Depending on battery placement I can even hover it in low winds. Fun plane.
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Old Dec 05, 2013, 09:31 PM
Electric Airplane Junkie
bhchan's Avatar
United States, CA, San Mateo
Joined Jun 2000
5,597 Posts
It started about 10 years ago, here, http://www.rcgroups.com/forums/showthread.php?t=143247 my conversion starts at thread #209 and on....

Motor is AXI 2826/12 on 3S6000(need the nose weight!) on APC 15x8.

Later switch to a 4S4000 and 13x8, less torque from the smaller propeller made the ground handling on take offs mush easier.

The AXI2826/12 has a Kv of 760. I am sure you can find a Turnigy or equal motor much cheaper these days.

Brian, an EAJ
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Last edited by bhchan; Dec 05, 2013 at 09:33 PM. Reason: More info added
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Old Dec 06, 2013, 12:49 AM
Registered User
United States, ID, Shelley
Joined Dec 2011
445 Posts
See if this helps.
Myself, I would shoot for @100 watts/pound.
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Old Dec 06, 2013, 01:01 AM
Electric Airplane Junkie
bhchan's Avatar
United States, CA, San Mateo
Joined Jun 2000
5,597 Posts
I don't know what watt/pound is on my set up, as I don't weigh my planes!!

Brian, an EAJ
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