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HelicopterMain Discussion › Back flip tail yaw
03-22-2009 01:05 PM  8 years agoPost 1
flying buffalo

rrApprentice

Darwin, NT,​Australia

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Hi all, I have a new 600N with a JR770 Gyro with 8900 servo. The problem is when I backflip to inverted the heli yaws to the left just slightly. Its no major problem but just annoying that I have to make adjustments evry time I back flip. Forward flips appear to be good. Im using a Futaba 9c. Gyro has been set up in rate mode to find neutral, end points are at 140 with dual rates on rudder set to 70% and expo set at -60. Ive gone to -60 on expo thinking it was me yawing slightly as I apply elevator (mode 1)but this is not the case.
Gyro mounting tape is good and also have a velcro tie down holding it.
Engine tuning is good (os50).

Any ideas on what might be causing this drift during backflips, or should I start again with gyro setup.

cheers Robert

Yesterday was history...tomorrow is mystery

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03-22-2009 01:17 PM  8 years agoPost 2
Thomas L Erb

rrKey Veteran

Alliance ohio

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what headspeed are you running in idle up? Tom

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03-22-2009 01:59 PM  8 years agoPost 3
BarracudaHockey

rrMaster

Jacksonville FL

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Are you sure its not your fingers?

Also if you're bogging the engine when flipping you could be slowing down the tail enough to induce some drift.

Andy
AMA 77227
http://www.jaxrc.com

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03-22-2009 02:51 PM  8 years agoPost 4
flying buffalo

rrApprentice

Darwin, NT,​Australia

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Well, headspeed is 2000rpm in idleup and engine is not bogging during the flip. I too was sure it was my fingers so went from -40 expo on rudder to -60 on expo, but can say with confidence that its not my fingers. Have 2 other nitro helis (50 and 90) using 401 gyros on both and dont have this issue.

thanks in advance Robert

Yesterday was history...tomorrow is mystery

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HelicopterMain Discussion › Back flip tail yaw
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