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Post by toff on Sept 19, 2010 17:23:38 GMT 1
;D ;D ;D Looking forward to this one!! Another quick build foamie - this time an A-10 Warthog. Wanted one for ages, can't afford the EDF version, so it's down to homemade again! 1700 kv Brushless pusher, 6x4 prop with 1500mah 3s for power. Pictured mid- build (about 3 hours work so far.) Totally built with hot glue. Weight so far 3.5 oz. Expected AUW 12-14 oz. Throttle/ elevator/ flapperons. Plans and build log here: www.rcgroups.com/forums/showthread.php?t=438589&page=9 |
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Post by killioughtta on Sept 20, 2010 0:10:55 GMT 1
I've had my eye on these exact plans for a few months now. I'd love to follow your build and see how it performs. Keep the pics coming.
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Post by toff on Sept 22, 2010 20:17:14 GMT 1
 Now finished! 14 oz AUW. Leaving it unpainted until I know it flies. Dummy engines made from toilet roll holders (I know! But its the only thing I could find.) I'll try and test fly tomorrow, but the weather report ain't so good, and I've got a meeting in the afternoon to find out if I'm being made redundant, so fingers crossed for both!  
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Post by toff on Sept 23, 2010 19:41:28 GMT 1
Bah!!  Followed the plan, got everything right, nice day, not windy, took it out to maiden........it flew like a brick! Balanced it out on the plans CG, and it was very nose heavy! No damage, so moved the battery back a little, full throttle, gentle launch......it flew like a slightly lighter brick! No damage, Still nose heavy. Moved the battery further back, throttle, launch.... now tail heavy, and nearly uncontrolable.Up, down, left, right... nightmare! Got back to terra-very-firma. Cracked fuz, and broken wing. However, now fixed, and CG now correct (2cm further back than on plans) So I'll try again tomorrow! |
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Post by leisureshoot on Sept 23, 2010 21:25:51 GMT 1
sounds like you need more speed?
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Post by toff on Sept 23, 2010 22:29:04 GMT 1
3s lipo+ 1700 kv with a 6x4 at full welly! It was pulling out of my hand. Speed wasn't the issue. At first launch, which was a proper throw, It rose slightly, and descended rapidly ( bit like a javelin), no matter how much up I was using. The fact it actually flew (albeit badly), when I moved the battery rearwards definately points the finger at the CG. Hopefully find out tomoz. Hope it works, cos it looked brilliant for the 30 odd seconds it was up!
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Post by killioughtta on Sept 24, 2010 0:44:10 GMT 1
Leave it a little nose heavy until you've flown it many times. Slowly move the CG back to neutral or slightly nose heavy. Personally, I'd have gone with a ~15-amp 2000-3000 kv motor for this model. The A10 has a tendency to NEED speed or it falls out of the sky like a brick. That may not be the case here but I wouldn't take any chances. Also, this model usually doesn't glide well; it takes some power during landing approaches.
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Post by toff on Sept 24, 2010 6:44:40 GMT 1
Changed the motor out for a 3000kv blue wonder. It's quite windy this morning (6.30 am), but I'm hoping its going to calm down later on.
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Post by toff on Sept 24, 2010 13:06:31 GMT 1
Oh yeah baby! Do that thang!! ;D ;D
Despite being very windy, I still went out and did it. Now flies on rails, and does what it's supposed to! Beautiful!!
Really looks the part in the air (Quite a few times it was just hovering, the wind being roughly 20 mph or so).
Definately build one, but: Reinforce the 'neck' of the fuz, just in front of the LE. definate weak spot.
Also, for first flights, aileron throws to minimum. I had mine set 50% on dual rates, it was far too much! This flight only set at 20%, which was plenty. Flaps are really effective!
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Post by killioughtta on Sept 25, 2010 2:54:40 GMT 1
Yeah, baby! Sounds fun now! Got me all excited about it and I can't build anymore planes... Wife: "You have too many planes, man! WTF?!" >=| stupid spouses.
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Post by toff on Sept 25, 2010 6:11:22 GMT 1
" I could either have another plane, or, if not, I'm converting to Islam, and getting another wife - your choice."
That A-10 really is a lovely plane.......
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Now finished! 14 oz AUW. Leaving it unpainted until I know it flies. Dummy engines made from toilet roll holders (I know! But its the only thing I could find.)
Followed the plan, got everything right, nice day, not windy, took it out to maiden........it flew like a brick! Balanced it out on the plans CG, and it was very nose heavy! No damage, so moved the battery back a little, full throttle, gentle launch......it flew like a slightly lighter brick! No damage, Still nose heavy.
