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RV-8aAP Bank Servo Backwards

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japhillipsga(at)aol.com
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Posted: Sun Aug 14, 2011 9:46 pm Post subject: RV-8aAP Bank Servo Backwards

RV-8 Buds, flew my 8a this afternoon and finally screwed up the courage to turn on the AP. Took a mil second for the plane to snap roll to the right. Stopped her about vertical and flipped the switch. Must have wired the bank servo backward. Anybody know the easiest fix? I have a MGL EFIS Odyssey with Trio AP servos.  Shocking moment. Thanks, Bill of Georgia N288WP, 15.1 Hrs in Phase l  

  

     

  

    

     

  

     

  

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Speedy11(at)aol.com
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Posted: Mon Aug 15, 2011 6:42 am Post subject: RV-8aAP Bank Servo Backwards

Bill,

 Do some ground testing of the AP.  See if it instantly reacts and in  which direction while on the ground.  My AP would very slowly move after a  short delay while on the ground.  You can also detect and correct reverse  sensing at the same time.

 I'm surprised yours rolled so quickly.  That is very unusual for an  AP.  It sounds as if it went quickly to full deflection.  I make a  habit of guarding the stick each time I engage it.

 You may not have anything wired backward.  For example, if it engaged  in heading select mode and the heading bug was set to the right of the present  heading, the AP would quickly direct a right bank - although not to the extreme  you described.

 Have you called Trio about it?  I would talk to them first.

 Your gains may be set wrong also.

 Good luck,

 Stan Sutterfield

 Do not archive

  

  In a message dated 8/15/2011 3:08:20 A.M. Eastern Daylight Time,  rv8-list(at)matronics.com writes:

  	  Quote: 	
		  RV-8    Buds, flew my 8a this afternoon and finally screwed up the courage to 

turn    on the AP. Took a mil second for the plane to snap roll to the right.    

Stopped her about vertical and flipped the switch. Must have wired the    bank

servo backward. Anybody know the easiest fix? I have a MGL EFIS    Odyssey wi

th Trio AP servos. 	


  [quote][b]

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japhillipsga(at)aol.com
Guest

Posted: Mon Aug 15, 2011 9:27 am Post subject: RV-8aAP Bank Servo Backwards

Stan, thanks for the shoulder, I'll call MGL & Trio the P.M. Best to you, Bill

 

   

 

 

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