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HomeAircraftHelicopterMain Discussion › TAIL WAG AT HIGH SPEEDS
12-13-2004 03:55 AM  13 years agoPost 1
rcpilotaz

rrNovice

Arizona

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I HAD A PROBLEM WITH NOSE OVER LOOPS, MY TAIL WOULD GO CRAZY AND JERK NOSE RIGHT. WELL I CHANGED MY ARM TO 17mm OUT FROM CENTER. NOW IT NOSE OVER LOOPS GREAT, CAN 360 AND FLY IN REVERSE AT HIGH SPEEDS. BUT NOW THE TAIL WAGS WHEN I TURN RIGHT AND GO NOSE IN TO THE GROUND.
HELP!!!!!!
GY401 @ 65% LIMIT AND 0 DELAY, 9254, RAPTOR 50, OS 50, 80mm TAIL BLADES

WHAT CAN I DO, THIS MAKES ROLLS, LOOPS AND STALL TURNS CLOSE TO THE GROUND REALLY SCARY

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12-13-2004 04:07 AM  13 years agoPost 2
Saint728

rrProfessor

Honolulu, Hawaii

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You can start by turning off the caps lock. I don't know why your tail would wag only turning to the right? Your gain seems kind of low so that couldn't be the problem. Try lowering the gain and see what happends?

Take Care,
Cheers, Patrick

Check the hotties in my Gallery
http://rc.runryder.com/helicopter/gallery/9019/?all=photo

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12-13-2004 04:31 AM  13 years agoPost 3
Mr.Gravity

rrApprentice

Mena,AR

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rcpilotaz,
I had similar problems and had tried all kinds of adjustments,engine,
gyro replacement, tail servo replacement and a few other things. Finally figured out by accident that the crankshaft bearings had a small amount of pitting which made a rough spot on one or both of the bearings. By hand turning you could not really feel it but with the bearings and crank out, I put the bearings on the crank for inspection only and used an airhose with high air pressure to give them a good cleaning. When I hit the bearings at an angle with the high pressure air,
they would spin very high rpm's. Once they were turning very fast you could intermittently feel a bump with crank in hand because the bearings had hit the bad spots and would try to catch for a milli second.
At low throttle in the heli it didn't show up very bad but as you would fly and get the rpm's up there and especially in corners the tail would wag.
Mine on a left turn would wag to the inside of the turn down toward the ground. If all else fails check your engine bearings.

Good Luck

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12-15-2004 02:31 AM  13 years agoPost 4
helifish

rrNovice

Barnhart

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I recently had the same problem with raptor 50. I had just a little play at the horrizontal fin bracket where the boom suports hook to. I could't get it snug enough with just tightening the screws. I removed fin bracket and wrapped electrical tape aqround boom and re-enstalled, that made it snug. I haven't had that problem since! it dosen't take much boom slop to cause tail wag especially during hi speed maneavers. Hope this solves you're problem.

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12-15-2004 02:38 AM  13 years agoPost 5
helifish

rrNovice

Barnhart

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Oh, also try another tail servo. I went through that mess too. But it all worked out after I bought a new 9254 !

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12-15-2004 05:43 AM  13 years agoPost 6
Mike Wilson

rrVeteran

Toronto, Canada

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I second the suggestion from TREE. I went from the standard 85mm tail blades to 93mm blades and there was a huge difference in tail performance. You will have to re adjust your gyro gain once you install new blades as well and I would use blades with a wide surface area like NHP or SAB.

....led

Teambob00

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