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Old Jan 16, 2012, 10:09 AM
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alpea 41's Avatar
United States, CA, Chino
Joined Oct 2007
10,206 Posts
Cool
Cartoon Mig 15 3 blade prop as DIY EDF

Put this up here cuz it's unusuall..
I built Sparks'es cartoon Mig 15. He designed it to fly with a 3 blade prop cut down to fit in the fuse in the nose.
I first got it to fly as a pusher with tail mounted motor as a pusher , but needed a 2200ma battery in the nose to balance it. Wing loading was high at AUW of 20 oz.
So I mid mounted the motor in the fuse and tried with a cut down prop. Not enough air out the rear. Went to a cut down 3 blade GWS prop , still not enough thrust. Changed to a 2212 06 2200 KV motor and away it flew .
All my trials and successess are at the end of Sparkes Cartoon Mig 15 - F-86 thread here http://www.rcgroups.com/forums/showthread.php?t=1441002


But if you've ever wondered if a crude EDF could be made out of a prop in a fuse , here's your answer

20120115 0641 (0 min 56 sec)


20120115 0642 (0 min 46 sec)


20120115 0645 (1 min 6 sec)
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Old Jan 17, 2012, 11:51 PM
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MUTCAKE's Avatar
USA, WA, Bremerton
Joined Mar 2009
942 Posts
Now that's what I like! You guys always have fun when you fly! All the laughing makes me laugh. Great job.
Keith
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Old Jan 18, 2012, 09:07 PM
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Canada
Joined Nov 2000
6,983 Posts
Well I admire the candor about "crude' :-)
It seems to go around in circles OK. Is it capable of More?
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Old Jan 18, 2012, 09:15 PM
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alpea 41's Avatar
United States, CA, Chino
Joined Oct 2007
10,206 Posts
I think if I try a 4000 kv motor like your smallest EDF has I will be more comfortable rolling it and it might even loop. But when you try a dozen underpowered launches where it returns to Earth for lack of thrust believe me you are pleasantly satisfied to the point of giddy to fly a few circuits ...
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Old Jan 19, 2012, 01:08 AM
I don't like your altitude
Stupot46's Avatar
Joined Sep 2011
3,287 Posts
Caproni Stipa next.
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Old Jan 19, 2012, 06:43 AM
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USA
Joined Apr 2007
2,392 Posts
YOU never said what size fan is after cut down prop. I use 3 blad 64mm fan two for $10 3500kv dw 12AMP
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Old Jan 19, 2012, 09:33 AM
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alpea 41's Avatar
United States, CA, Chino
Joined Oct 2007
10,206 Posts
Prop was GWS 10x6x3 cut down to about 6x 6x3. the plane woulda flown fine with a light edf set up 64mm or so , the experiment was to make it fly with an internal propeller.
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Old Jan 19, 2012, 12:14 PM
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USA
Joined Apr 2007
2,392 Posts
yea you need 4000kv motor. make sure prop is on right numbers to front
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