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HelicopterMain Discussion › Set-up or Gyro problems
03-15-2003 11:05 PM  14 years agoPost 1
rcbuzzby

rrNovice

Michigan

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Sceadu 50 SWM
OS50SXH W/Hatori Muffler
JR 649 PCM Receiver
JR550T Gyro

Today I had a problem that I havent experienced with any other heli so far. I think it's a common thing but not sure. Can any one help?

Started the heli for the first time. Everything is new with the exception of the Gyro that came out of a Ergo 50 that bit the dust. I ramped up slowly with the head holding off and checked the rudder direction. That was OK being that left & right were correct. As the RPM's increased and I was at near lift off speed the heli pirouetted 90 degrees in a micro second. I tried to adjust the trim but when I did it again, it still did it. It was not as though the trim was off. Kinda like comeone slapping the tail.

Any ideas. You guys have always been helpful in the past.

Thanks, DJ

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03-15-2003 11:16 PM  14 years agoPost 2
SteveH

rrProfessor

Texas

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Sounds to me like you have the gyro direction reversed, not the tail rotor pitch, but the gyro direction. With the system on, turn the nose of the heli to the left and the gyro should give right or increase tail rotor pitch. Hope this helps.

SteveH

The government cannot give you anything without first taking it from someone else.

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03-16-2003 10:19 AM  14 years agoPost 3
GT6

rrApprentice

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If the gyro was reversed it would just go into a blur on liftoff and not stop till you land or hit throttle hold (guess how I know!). If its an occasional 'kick' think about static electricity build up from the belt drive - it was a known problem with the Shuttle.

Other possibility is a duff pot in the servo or some other servo defect.

Good luck with it!

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HelicopterMain Discussion › Set-up or Gyro problems
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