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RV 4 Electric Aileron Trim

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tmccurry(at)greenwoodcpw.
Guest

Posted: Mon Mar 30, 2009 12:00 pm Post subject: RV 4 Electric Aileron Trim

Hello List, Recently I purchased a RV 4 that was completed in 1988 by another builder. The aircraft has as electric trim in the left wing tip which does not work at this time. I have confirmed that the switch is sending power (12vdc) out to the servo motor but nothing happens. Checking the leads from the motor with an ohm meter indicates an open circuit. My problem is that I can see rivets in the wing tip where the trim motor is mounted but there is no assess panel to service the motor. Has anyone got any ideas  that might be a solution which would work other than removing the wing tip?   

Thanks  

TM  

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recapen(at)earthlink.net
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Posted: Mon Mar 30, 2009 12:23 pm Post subject: RV 4 Electric Aileron Trim

How is the trim actuated?  Is there a tab on the trailing edge or is there a built-in tab in the trailing edge?  Can you get to the 'other' ends of the wiring?  Are there two or five wires?  (two being for motor only and five giving you a position indicator)



Is there a landing/taxi light in the leading edge?  That might provide access the the area forward of the spar.  For the area aft of the spar, removing the tip is the only option that I can dream of.



I made my tips removable as my strobe power packs are out there.  If there's stuff out there that might (ever) need to be worked on, I would figure out a way to make the tips maintenance oriented.



Just my .02 worth,



Ralph

RV6A N822AR (at) N06 8.3 hrs



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panamared505(at)brier.net
Guest

Posted: Mon Mar 30, 2009 12:36 pm Post subject: RV 4 Electric Aileron Trim

You can cut your own hole and then make an access  panel.  But, even then, I find in the long run you will end up taking the  wingtip off anyway. 

  

 I know everyone has a different perspective, but I  have been flying for 7 years with no manual or electric trim.  I have the  manual trim, but I have not installed it. I don't see any real benefit for the  amount of work involved.

  

 Bob

 RV6 "Wicked Witch of the West"

  

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jfogarty(at)tds.net
Guest

Posted: Mon Mar 30, 2009 1:36 pm Post subject: RV 4 Electric Aileron Trim

Is the servo attached with rivets and a rod attached to the aileron, or is 

everything on the inside of the aileron?  Is there an inspection plate 

somewhere along the aft edge of the wing?  Do you know the previous owner of 

the plane and/or the original builder?   If you remove the tip, you could 

use platenuts or a piano hinge to reinstall the tip.  Others have cut an 

opening in the tip and then reinstalled the fiberglass with platenuts.  This 

may be a good way to get into the wing and the worst case is you need a new 

tip or fiberglass repair.  Just my 2 cents.



Jim

RV9a building

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