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09-09-2006 01:22 PM  14 years ago
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Helijockey

rrKey Veteran

150 miles from somewhere

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GY401
I have a Gy401/9254 on my raptor, it was set up perfectly and I've been using it for the last year or so. The other day the servo started to chatter without any rudder input. This was just prior to starting the engine, so I replaced the servo with another 9254 because I didn't want to waste the weekend's flying. All was well till the third flight when the tail started to wag. I increased/decreased the gyro sens and reset the rudder....twice. I even changed the servo with a friend's 9254, still I can't get it to stop wagging Now I'm thinking maybe it's the gyro which has the problem since I've changed the servo already. What do u guys think?
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09-09-2006 04:40 PM  14 years ago
ronlaw

rrNovice

uk-scotland

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helijocky where is the gyro mounted as had the same when the gyro was on top of the servo tray next to the pitch arm at front was getting feedback from the elev servo futaba 9252 and the tail servo was chattering like mad now moved to the back fine now hopes this helps cheers ron
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09-09-2006 09:06 PM  14 years ago
BarracudaHockey

rrMaster

Jacksonville FL

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Check the mounting tape on the gyro and that nothing is binding in the tail pitch slider.Andy
AMA 77227
http://www.jaxrc.com
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09-10-2006 01:00 AM  14 years ago
RJacobs

rrNovice

Montreal, Canada

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You may need to increase the gain... and make sure you're in heading hold mode. When the unit turns on, make sure it flashes 3 quick times and then goes solid. If it doesn't, it is either not initialized properly, or you are not in heading hold. Also, verify that when you give a slight rudder input (on the ground with engine off) that the servo slowly moves all the way to the extents, each direction. And verify that when you hold the rudder still, but twitch the gyro slightly in your hand (while still mounted, just give it a subtle twitch with your hand) that the rudder responds to each... Just some obvious checks to perform in case you haven't already done so.

Jacobs
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