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heavy left wing

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AirEupora

Joined: 01 Nov 2009
Posts: 186
Location: Dixon, CA

Posted: Thu Nov 15, 2012 5:36 pm Post subject: heavy left wing

I have finally figured out my overheating problem with the Jabiru engine.  Mostly it is the MGL EMS unit telling me that the engine is 36 C hotter than it really is.  



I have now been able to fly for longer times and distance and one of the first things that got my attention is the heavy left wing.  The aileron tip is down about 1 to 1 1/2 inches is straight and level flight.  The right is up about 1/4 to 1/2" .  I had been thinking since I weight in at 250 pounds that was the cause, but today I added 150 pounds to the PAX seat, Sand Bags!.  It helped, but not my much.



Bud had sent a picture of adding a pencil to the bottom of the aileron.  This bought the aileron up, but the turning increased.  



I'm thinking that I don't have enough lift on this wing or too much on the right wing.  



I remember reading a couple of months ago about making the flap stay down by placing a block on the up side of the slot.  



Is this really a good way to add lift to this wing?



Or is there a better way?  I remember when I set the Angle of Incidence and even took  pictures of both sides.  



What do I do now?

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ptag.dev(at)tiscali.co.uk
Guest

Posted: Thu Nov 15, 2012 11:02 pm Post subject: heavy left wing

Hi! Irrespective of loading it is IMHO that you should start from a point of

both ailerons being matched slightly up of dead neutral on the ground, which

you should be able to adjust with all the various points to do just that. 

Then fly and fine tune it from there. Best of luck with the Jabiru but watch

out for cyl head distortion, because unless you have calibrated all the

instruments the engine temps can't be believed. That engine will soon tell

you what temperatures it is suffering without any gauges ! Been there got

the "T" shirt.

Regards

Bob Harrison G-PTAG Now with Rotax 914 !!!! 



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bill mcclellan

Joined: 28 Jan 2010
Posts: 43

Posted: Fri Nov 16, 2012 8:18 am Post subject: heavy left wing

Something to check for with your "heavy wing problem".  I had a similar problem with my plane following a major wing repair, not my Europa but my Citabria.  It sure seemed that one wing had notably more lift than the other.  The incidence was equal wing to wing with no visible or measurable difference between wings but it would not fly straight without input pressure on stick and rudder, it wanted to roll.  Because it seemed to be a wing problem, I proceeded to adjust the washout/washin to correct the difference in lift, this can be done with a high wing by adjusting the struts.  I could get it to fly hand off but then one aileron was 1 inch up and the other down.  Needless to say, I sure didn't like the stall characteristics with unequal washout.  Scratching my head and deciding to look outside my box, the problem turned out to be a misinstalled tail wheel spring inputting rudder pressure to one side.  This was not an intuitive place to look for me but it sure was the problem.  Correcting the spring and rudder, it was then easy to get the plane tuned up and flying hands off straight and level.  So you might check if your rudder linkage is inputting pressure to one side.

Bill McClellan

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AirEupora

Joined: 01 Nov 2009
Posts: 186
Location: Dixon, CA

Posted: Sat Nov 17, 2012 8:23 am Post subject: Re: heavy left wing

Thanks Bill



While flying I have check the ball and played around with the rudder to see if I could pick the wing up using rudder.  It helped a a little, but the wing does not want to fly level.



I have completed my stalls with light weight and with heavy weight.  The right wing always stalls first.  Power on stall I could not get the plane to stall.  It would turn to the left, almost like a VMC demo on a twin, where I could not control the turn.  It was not at an altitude where I felled comfortable doing a complete power on stall with the wing acting this way.  



I'm thinking that I made a mistake on the angle of incidence.  Although I took pictures showing the 2.5 degree on both wings it acts as if there is not enough on this wing.



Now, how do I correct it?

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grahamsingleton(at)btinte
Guest

Posted: Sat Nov 17, 2012 8:36 am Post subject: heavy left wing

First thing to check is the incidence at 2/3 span and almost full span. Incidence at the root is not really important. 

Make two more templates with a Vee that locates against the leading edge and rests on the trailing edge of the wing,

(not flap or aileron) Then compare the two wings at each point. The further outboard the more the effect of any error.

Graham

        From: AirEupora <AirEupora(at)sbcglobal.net>

 To: europa-list(at)matronics.com 

 Sent: Saturday, 17 November 2012, 16:23

 Subject: Re: heavy left wing

  

 

--> Europa-List message posted by: "AirEupora" <AirEupora(at)sbcglobal.net (AirEupora(at)sbcglobal.net)>



Thanks Bill



While flying I have check  the ball and played around with the rudder to see if I could pick the wing up using rudder.  It helped a a little, but the wing does not want to fly level.



I have completed my stalls with light weight and with heavy weight.  The right wing always stalls first.  Power on stall I could not get the plane to stall.  It would turn to the left, almost like a VMC demo on a twin, where I could not control the turn.  It was not at an altitude where I felled comfortable doing a complete power on stall with the wing acting this way.  



I'm thinking that I made a mistake on the angle of incidence.  Although I took pictures showing the 2.5 degree on both wings it acts as if there is not enough on this wing.



Now, how do I correct it?





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