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  #1  
Old 03-08-2018, 05:13 PM
Phenomflyer237 Phenomflyer237 is offline
 
Join Date: Oct 2017
Location: Sarasota Florida
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Default Left Wing Heavy RV6A

I did not want to steal "Right wing Heavy's post".
my RV6A rolls left I can trim mine to fly hands off with the aileron trim at the 2-oclock position. Is there a way to adjust the rigging in this case? Should i examine the trailing edge in this case also? Do the ailerons apply as well?
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  #2  
Old 03-08-2018, 06:48 PM
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az_gila az_gila is offline
 
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Looking at the same thing on my -6A but I don't have the roll trim spings installed yet.

Is it left side heavy flying solo or with two equal weight folks on board?
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  #3  
Old 03-08-2018, 07:36 PM
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Bob Martin Bob Martin is offline
 
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Default Heavy Wing

http://vansaircraft.com/pdf/Wing_Heavy.pdf

The above PDF is a good starting point.
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RV-6, 0-360 Hartzell C/S, Tip up, 1150+TT
James extended cowl/plenum, induction, -8VS and Rudder. TSFlightline hoses. Oregon Aero leather seats.
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  #4  
Old 03-08-2018, 08:59 PM
Bicyclops Bicyclops is offline
 
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The heavy wing FAQ is helpful. I had a heavy right wing and I squeezed the left aileron trailing edge which didn't help that much. I finally got serious, made a plywood airfoil template, and found the the right aileron was a bit high. When I fixed that, the heavy wing moved to the left side. I tapped the trailing edge with a wood block and all is now good. Check your aileron hinge height carefully before you get medieval on it.

Ed Holyoke
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  #5  
Old 03-09-2018, 04:20 AM
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Bob Martin Bob Martin is offline
 
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Default Template

Quote:
Originally Posted by Bicyclops View Post
The heavy wing FAQ is helpful. I had a heavy right wing and I squeezed the left aileron trailing edge which didn't help that much. I finally got serious, made a plywood airfoil template, and found the the right aileron was a bit high. When I fixed that, the heavy wing moved to the left side. I tapped the trailing edge with a wood block and all is now good. Check your aileron hinge height carefully before you get medieval on it.

Ed Holyoke
Ed,
Would you describe your process of building an airfoil plywood template?
Obviously the plans are not full scale.
Do you or I just use the actual finished wing as a male side and extend the top and bottom skin lines back to an intersection point?
Thanks
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Bob Martin
RV-6, 0-360 Hartzell C/S, Tip up, 1150+TT
James extended cowl/plenum, induction, -8VS and Rudder. TSFlightline hoses. Oregon Aero leather seats.
D100-KMD150-660-TT ADI2- AS air/oil seperator. Vetterman exhaust with turndown tips.
Louisa, Virginia KLKU N94TB
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  #6  
Old 03-09-2018, 05:00 AM
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Default Wing template

Vans sells a full sized Template
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  #7  
Old 03-09-2018, 06:43 AM
BillL BillL is offline
 
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Location: Central IL
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Default

I have a heavy wing as well and working through the document with some assistance from Eric at Vans. The final solution has not been reached, but in hearing about the aileron "height" made this to understand what it is supposed to be.

The aero guys could help here too. The B zone on mine droops a little due to the installation of that brace (aileron fairing). The A point seems like it should be exactly in line with the extended (straight) line of zones B and C. I am assuming aileron height is relative to that line? Suppose that A is in line but the zone B is drooped by a mm, what effect would that have?

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  #8  
Old 03-09-2018, 08:49 AM
rvbuilder2002 rvbuilder2002 is offline
 
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The ailerons by design are a bit fat in thickness, so the top and bottom surface of the aileron wont ever be perfectly coincident with the top and bottom skins of the wing.
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  #9  
Old 03-09-2018, 09:10 AM
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Bob Martin Bob Martin is offline
 
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Default Template

Quote:
Originally Posted by rvbuilder2002 View Post
The ailerons by design are a bit fat in thickness, so the top and bottom surface of the aileron wont ever be perfectly coincident with the top and bottom skins of the wing.
Ok, I hear you say they won't ever be perfectly lined up.
What is the process of alignment?
Ed says make a template, I assume to check alignment.
I read about others raising or lowering the attach bracket by 16th's of an inch to cure issues.
Are they just suposed to be the same on each end and each side, as oposed to being perfect alignment?
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Bob Martin
RV-6, 0-360 Hartzell C/S, Tip up, 1150+TT
James extended cowl/plenum, induction, -8VS and Rudder. TSFlightline hoses. Oregon Aero leather seats.
D100-KMD150-660-TT ADI2- AS air/oil seperator. Vetterman exhaust with turndown tips.
Louisa, Virginia KLKU N94TB
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  #10  
Old 03-10-2018, 09:07 AM
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az_gila az_gila is offline
 
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Location: 57AZ - NW Tucson area
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Smile

Quote:
Originally Posted by Bob Martin View Post
Ed,
Would you describe your process of building an airfoil plywood template?
Obviously the plans are not full scale.
Do you or I just use the actual finished wing as a male side and extend the top and bottom skin lines back to an intersection point?
Thanks
I could never get any of the templates cut accurately enough to get good alignment on my -6A.

Instead I used two flexible yardsticks laid chord-wise, one on each surface of the wing, and flexed them to meet at the trailing edge. Just envision the flexible rulers as the airflow and get an idea of the top and bottom surface 'smoothness' to this airflow.

As Scott says the aileron is a little 'fatter' than the aft end of the wing so these yard sticks can see if the 'bulge' is equal on the top and bottom surfaces. This method will also check for a top surface skin 'ski-jump'.
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Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ

Last edited by az_gila : 03-10-2018 at 09:10 AM.
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