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Aileron Trim

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lmassaro(at)tac-eng.com
Guest

Posted: Tue Apr 27, 2010 8:51 am Post subject: Aileron Trim

Has anyone had this issue:



 From one flight to next, I seem to have issues with aileron trim.  One 

flight straight and level, next flight left wing heavy.  Next flight not 

so bad.  Seems to be the model of inconsistency.

Should this be changing so much?  Fuel levels, tank imbalances, 

passenger loading all should have much of an effect right? Most of the 

mass is near the longitudinal access of the airframe.  The only thing I 

can think of is that maybe the flaps in the retracted position are 

sitting differently after each flight.



Any ideas?

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pitts_pilot(at)bellsouth.
Guest

Posted: Tue Apr 27, 2010 10:16 am Post subject: Aileron Trim

Is it tied down outside???  Rain may be an issue.

Linn



Lawrence Massaro wrote:

 	  Quote: 	
		   

 <lmassaro(at)tac-eng.com>

 

 Has anyone had this issue:

 

  From one flight to next, I seem to have issues with aileron trim.  One 

 flight straight and level, next flight left wing heavy.  Next flight not 

 so bad.  Seems to be the model of inconsistency.

 Should this be changing so much?  Fuel levels, tank imbalances, 

 passenger loading all should have much of an effect right? Most of the 

 mass is near the longitudinal access of the airframe.  The only thing I 

 can think of is that maybe the flaps in the retracted position are 

 sitting differently after each flight.

 

 Any ideas?

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JHOSLER(at)epri.com
Guest

Posted: Tue Apr 27, 2010 10:35 am Post subject: Aileron Trim

I have had my Tiger for 29 years tied down and hangared and this has

always been the case.  Seldom enough to ever require readjustment of the

trim tabs though.



Rain can affect aileron trim during flight though.  Sometimes

significantly.



John Hosler

704-252-0780



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rburgher(at)digitalintell
Guest

Posted: Tue Apr 27, 2010 10:42 am Post subject: Aileron Trim

Larry,

I sometimes have the same issue! Coming home from E45 (Pine Mountain Lake)

last Sunday, even with heading auto-pilot, it wanted to fly left-wing low.

Other times aircraft flies perfectly level. I have fiddled with aileron trim

several times.



On another issue, anyone have any idea why one of my EGT temps is 150

degrees less that others (1145, 1300, 1310, 1280)??

Thanks



Ron Burgher

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flyv35b(at)minetfiber.com
Guest

Posted: Tue Apr 27, 2010 11:19 am Post subject: Aileron Trim

 	  Quote: 	
		   On another issue, anyone have any idea why one of my EGT temps is 150

 degrees less that others (1145, 1300, 1310, 1280)??

 Thanks


	


It's probably running considerably richer than the others.  Try leaning the 

engine significantly more and see if the don't even out more.  Do it at 

3000-4000 ft and 2500 rpm and you can't hurt the engine no matter what you 

do with the mixture.  Lean until it starts to run rough and then enrich just 

barely to smooth it out and see what your temps are.



Cliff

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GrummanDude

Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA

Posted: Tue Apr 27, 2010 6:43 pm Post subject: Aileron Trim

Larry, 

 

  About 14 years ago, I flew an AG5B to Florida to deliver it to a new owner.  I had picked up the plane in the Bay Area and flew it to Lancaster.  It was 'out-of-trim.'  So, when I landed, I gave the aileron tab a little tweek.  After the annual, it was out the other way, I landed, did a smaller correction and then reflew.  It seemed ok.  During the flight to Florida, I fought aileron trim issues the entire flight.  I tweeked it every time I stopped for gas.  I could not get the trim set right.  

  

 

  At that time, I hadn't thought much about the flap rigging on the plane.  

  

 

  On my plane, I have the flaps reflexed enough to cause a roll change based on flap setting.  Works kind of nice to correct for fuel imbalance.  I'm not sure it would work on all planes.  Try tapping the flaps down a degree at a time to see if you notice any change.

  

 

  It is true that passengers and loading will have an effect on roll; enough to be annoying.

  

 

  Gary

 

  

 

 

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_________________
Gary
AuCountry Aviation
Home of Team Grumman

lmassaro(at)tac-eng.com
Guest

Posted: Wed Apr 28, 2010 7:44 am Post subject: Aileron Trim

Thanks to all for the responses.

And re: rain, the plane is hangered.

The thing that gets me is that I dont recall it ever being a problem 

until recently (over the last year maybe).

I am going to do a few test flights and apply Gary's check and move the 

flaps small increments to see if that has an effect.

Larry Massaro

9186M

'92 AG-5B

KRNM

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