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Old 05-02-2010, 07:07 PM   #1 (permalink)
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Default help with brushless motor

i have a 430L BL motor 3550 KV it came with my trex sa. i was wondering if i could usse it in an airplane. if i can what size prop ? the esc is a 35a BL thanks
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Old 05-06-2010, 01:02 AM   #2 (permalink)
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For practical purposes and in general Id have to say NO.You can roughly figure a 3550kv motor on 12volt is going to turn 40,000rpm and then some.Even with a good load on it I think 30,000 easily.I think I saw a thread somewhere of someone doing it but you would need a tiny prop like 3x3 or something like that.Like a ducted fan without the duct.
Thats my thinking on it.Maybe someone else has another idea.
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Old 05-07-2010, 12:09 AM   #3 (permalink)
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Gear it and turn a big prop.... Kv is definitely too high to use that motor in a propped airplane unless it's geared and run on 2 cells. Ducted Fan use might be ok tho..
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Old 07-02-2010, 06:21 PM   #4 (permalink)
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Quote:
Originally Posted by dr66 View Post
i have a 430L BL motor 3550 KV it came with my trex sa. i was wondering if i could usse it in an airplane. if i can what size prop ? the esc is a 35a BL thanks
A couple guys have good success with an APC 4.1x4.1 on a wing.
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Old 07-03-2010, 01:41 PM   #5 (permalink)
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maybe as a pusher with a 4" prop, anything else ain't going to cut it. Motors are so cheap these days just get something more appropriate, I'm currently swapping my blown 2900kv motor plus 3:1 gearbox for a 1000kv unit for about 12
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