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need advice on elec. conversion

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Old 02-26-2004, 04:57 PM
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mtn geezer
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Default need advice on elec. conversion

I am building a seagull arf (rising star) wingspan 63.5 wing area 659 sq, in. wieght 5 lbs without motor or batteries. Could anyone recomend an elct. motor, speed controller and battery set up, please. I am new to elect. and know almost nothing about it so any help you can give would be appreciated. Thanks
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Old 02-26-2004, 05:02 PM
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flyinrog
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Default RE: need advice on elec. conversion

you might get better information over in the electric forums....
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Old 02-27-2004, 06:39 AM
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Default RE: need advice on elec. conversion

Using your data, I would shoot for a system with about 700 watts. That's assuming the final weight at 7 lbs. Take 700 watts and divide by a current draw of 30 to 40 amps and you get a battery voltage of 18 to 23. Now, just find a system that fits those secs. and you'll have a winner.

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Old 02-27-2004, 06:58 AM
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Default RE: need advice on elec. conversion

AXI 4130/16 running on 20 cells
Hacker B50's geared
Mega 22/45/3 geared
Maxi Cim geared

Note: Motorcalc predicts a high wingloading with nicad/nmh. Li-polys would reduce it some. Just to make sure, the empty weight is 5 lbs. I assume that you weighed it. It seems high. This is the problem with converting some arfs. Pilot skill would make it work, but you are still looking at 30 ozs/sq. ft.

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Old 02-27-2004, 09:32 PM
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mtn geezer
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Default RE: need advice on elec. conversion

Much obliged for your help, friend. geezer
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