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Old Sep 26, 2012, 07:34 AM
Registered User
Joined Jul 2012
63 Posts
Help!
prop and motor for pusher fpv

prop and motor for pusher fpvp combo and even I have posted about it but took no results
Im pleased if you can help and suggest a in or outrunner motor and prop.

I have 2m wingspan pusher plane(for fpv)
weighting 1000g (35.7 oz) without motor and battery,
max. Prop diameter is 7".
Also we want the plane to fly like trainer models, acrobatics are unnecessary, flight time is about 10m or less and speed is as low as possible (25mph or higher if necessary), i read guides and whole site but didn't find an answer
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Old Sep 26, 2012, 11:00 PM
BEOWULF
North vancouver, B.C. Canada
Joined Apr 2008
18,588 Posts
Try 4 cell with very low kv motor and largest prop

The low kv motor will let you put monstrous prop on
Slow fly apc work well

7x5 Apc slow fly is good

Expect lots more flight time



[



QUOTE=abuzer01;22838132]prop and motor for pusher fpvp combo and even I have posted about it but took no results
Im pleased if you can help and suggest a in or outrunner motor and prop.

I have 2m wingspan pusher plane(for fpv)
weighting 1000g (35.7 oz) without motor and battery,
max. Prop diameter is 7".
Also we want the plane to fly like trainer models, acrobatics are unnecessary, flight time is about 10m or less and speed is as low as possible (25mph or higher if necessary), i read guides and whole site but didn't find an answer[/QUOTE]
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Old Sep 27, 2012, 02:10 AM
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Joined Jul 2012
63 Posts
Firstly I posted on my phone and it didn't send "hello ... part", sorry for that,

I think by saying low kv motor you mean outrunner, so can it supply enough thrust? because as you see our prop is relatively small (7") ? and if so, can you suggest a motor?
Also, because I want slower speed, isn't it little high for a pitch(5")? or is there a reason for not 3"?
thanks again
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Old Sep 27, 2012, 07:15 AM
skidding in the sky
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Australia, VIC, Melbourne
Joined Jan 2010
1,110 Posts
http://www.rcgroups.com/forums/showthread.php?t=739069

do the learning, it's worth it
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Old Sep 27, 2012, 10:33 AM
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Joined Jul 2012
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Learning is a life-long process, but I did read all related topics including that; but still can't sure what motor-prop would be satisfy the requirements.

And simply ask to anyone who can lead me; however it seems now it is more difficult than I think because no one replied except one that is not clear yet.
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Old Sep 29, 2012, 04:37 AM
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Joined Nov 2007
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Imho a plane weighing 1300 grams and intended for relatively slow flight
the 7" prop is to small to be efficient. 8" or 9" prop diam. and relative low kv motor would be better for thrust and cruise at low amperes.
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Old Sep 29, 2012, 06:07 AM
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Joined Oct 2009
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Assuming an all-up-weight of 1.5 kilos, I would start with an 3536-1250kV powered by 4s lipo. Turnigy at hobbyking is at around 20$.
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