What caused this crash?? - Page 3 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 09-06-2005, 08:38 PM   #21
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Airplane fixed!!

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I am happy to announce the airplane has been fixed! The C.G. was the problem and now it is what it should be. I flew it a bit today and the takeoff was BEAUTIFUL!! It lifted off the ground very gracefully and I gently pulled back on the elevator to get it up. The elevator is VERY responsive, even at 50% rates. I knocked that down a bit so tomorrow Ill get it out again (weather permitting) and give it a good run or two. I am really looking forward to doing some aerobatics with the plane. I think it will be a blast to fly!!

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Old 09-07-2005, 09:26 PM   #22
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Sorry misread this post

Have a great day!!!
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Old 09-08-2005, 04:51 AM   #23
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This hobby does keep us all humble, doesn't it?
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Old 09-09-2005, 12:13 PM   #24
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the only time that i have seen this happen before is when i was test flying my new spit.....

the aileron rates were WAY too high and the small amount of correction that i gave was too much and the wings stalled out on me....sending it from side to side, and then into the ground

also mixed into this was too much elevator movement......which pulled the plane off the ground too early


Speed is Life. Altitude is Life Insurance!!

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Old 09-09-2005, 01:00 PM   #25
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Yea, it was strange to see it happen.. now I can add another event to my experiences. I took it out to the field the other day and it wouldnt get off the ground because our runways are grass strips, so we handlaunched it. I threw it while another guy hat the tx and it flew great!! - for a second. It had plenty of power, MORE than enough - very quick. I was playing with the flaps a bit showing the other guy the flaperons and I dont think I put them back to their correct position becuase the other guy couldnt get the plane to stop climbing. Once he turned it back our way the battery fell out I had the rubber band holding the gas tank on, but forgot the one for the battery. Live and learn. Gotta glue it back together for a 3ord time


OHH by the way... 20% low rates are STILL very quick , have to have about 15% for it to be relatively docile. High rates are insane
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Old 09-09-2005, 01:51 PM   #26
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Originally Posted by KC8QVO
how do you explain the continuous rolling?? Stalling shouldnt cause the plane to roll THAT much. At the height I was I can see it rolling over on its top and going into the ground upside down, but for it to continuously roll like a football is what I dont understand.

I designed a model once and was playing with CG, got it pretty tailheavy one time.....went into a nice knife edge loop, after I exited I went to roll to level, and she kept rolling, so I corrected opposite and it went the other way.....I couldnt keep up

Could be a CG issue.

Doh....I guess I should have read the entire thread first Seems like you got it figured.
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Old 09-19-2005, 01:49 PM   #27
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What caused this crash

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Old 11-19-2005, 12:11 PM   #28
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Well i don t know what your flyin field looks like but i just had my cap do the same thing about 15 feet off the ground three times got over the same spot the plane just wanted to roll and dive so a friend and i went over to the spot in the field and found a thermal pocket took a peice of paper towel and held it out and let it go it went straight up .

just another idea to think about
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Old 11-19-2005, 09:02 PM   #29
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What piece glow talk!!!!!!!???????????
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Old 11-21-2005, 11:26 PM   #30
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It is definitaly the clasic stall spin on take off and some models are more prone to it than others so comparing it to yur other models won't help you to understand it. The reason the model keeps rolling is that it is still stalled. All the hores power in the world can't fix that. Incidently the P51 is probably one of the worst ones for this. I've owned a half dozen Mustangs over my 30+ years of modeling and they were all prone to it. Try a hand launch with a good toos and keep the nose low till it picks up speed and it should be fine. It sounds like your model might be heavy and this will greatly compound the effect.
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