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Old Yesterday, 05:06 PM
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Joined Feb 2014
44 Posts
I put this together in 2 hours. No plans, no thought; just cut and try. It glides, but not much more. tried a hubsan prop and my too big 3x2 but I think I need to get a gearbox.

3mm foam board a carbon arrow and a v911 brick.
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Old Today, 09:54 AM
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limmacslim's Avatar
United Kingdom, London
Joined Jun 2012
929 Posts
dews, the f939 gearbox is pretty well priced at banggood & works well.
http://www.banggood.com/WLtoys-F929-...-p-930770.html

You might also want to get some f939 prop's to save messing around with adapters etc. A friend ordered a prop to test, he has not flown it yet but at first glance it seems decent enough. Its quite light so should spin well & its large enough to make decent thrust, maybe not the toughest out there though.
http://www.banggood.com/WLtoys-F929-...-p-930766.html
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Old Today, 12:01 PM
Weltherrschaft will be mine
Germany, SN, Leipzig
Joined Nov 2012
265 Posts
i like the f939 prop....
it seems you have no dihedral, that would help
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Old Today, 01:39 PM
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Joined Feb 2014
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Yeah. As I said I just cut and glued. Will redo the wing when I have a gearbox that works.

I scavenged the gearbox from a broken v911. Does not look like it is going to work out. I will put a 5x3 on it and chuck it into the wind as soon as it stops raining and gusting.
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Old Today, 01:55 PM
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United Kingdom, London
Joined Jun 2012
929 Posts
The V911 gearing is way too much, I tried using a cut down v911 frame on the nose before & needed a huge prop to make it do anything interesting. It hung on the prop fine, even did a little bit of vertical flight but did not make enough pitch speed for normal level flight.

a 4:1 gear ratio seems to be the right way to go.
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