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Pesky heavy left wing

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hotwheels

Joined: 01 Jun 2007
Posts: 240

Posted: Sat Jan 26, 2013 2:16 pm Post subject: Pesky heavy left wing

I noted the presence of a heavy left wing since first flight nearly a month ago. My rudder is a bit off, but even when the ball is centered, there's a roll moment that cannot be ignored. 



During my build it was pointed out that one flap didn't match the other. That is, there is a twist. Now that the plane is flying I don't recall which is which (figures). I'm thinking this should be addressed first before going down the path of adding trim wedges or adjusting ailerons. Incidentally, I notice any roll when flaps are at 1/2 or full down positions. Hmmmm.



Looking at each flap at reflex, I can see that one of the inboard edges is flush with the underside of the fuse while the other is above the underside edge. Can someone who's flying maybe chime in as to what the "normal" position might be? Maybe a photo or two of the inboard edge would help?



Other than the roll, I'm finding the -10 is really fun to fly!



Thanks,

Jay

hotwheels

Joined: 01 Jun 2007
Posts: 240

Posted: Sat Jan 26, 2013 2:20 pm Post subject: Re: Pesky heavy left wing

Should have said "Incidentally, I DON'T notice any roll when flaps are at 1/2 or full down positions."



Jay

jesse(at)saintaviation.co
Guest

Posted: Sat Jan 26, 2013 2:51 pm Post subject: Pesky heavy left wing

The bottom skin of the flap should be flush with the bottom skin of the fuse. You could rig the high one down to flush, but you can see the twist easily by following the rivet line of the flap spar with the trailing edge of the wing top skin. They should be the same the whole way down the flap. If they are not, there is a twist in the flap. Unfortunately, if the flap is twisted, then the aileron will be rigged wrong (rigged to the flap), and more importantly, the wingtip will be rigged wrong (rigged to the aileron). You can counter a roll either with trim or with the rigging of the flaps when retracted, although a flap twist will cause a loss in cruise speed. 



Jesse Saint

I-TEC, Inc.

jesse(at)itecusa.org

www.itecusa.org

www.mavericklsa.com

C: 352-427-0285

O: 352-465-4545

F: 815-377-3694



Sent from my iPhone



On Jan 26, 2013, at 5:16 PM, "hotwheels" <jaybrinkmeyer(at)yahoo.com> wrote:



 	  Quote: 	
		   

 

 I noted the presence of a heavy left wing since first flight nearly a month ago. My rudder is a bit off, but even when the ball is centered, there's a roll moment that cannot be ignored. 

 

 During my build it was pointed out that one flap didn't match the other. That is, there is a twist. Now that the plane is flying I don't recall which is which (figures). I'm thinking this should be addressed first before going down the path of adding trim wedges or adjusting ailerons. Incidentally, I notice any roll when flaps are at 1/2 or full down positions. Hmmmm.

 

 Looking at each flap at reflex, I can see that one of the inboard edges is flush with the underside of the fuse while the other is above the underside edge. Can someone who's flying maybe chime in as to what the "normal" position might be? Maybe a photo or two of the inboard edge would help?

 

 Other than the roll, I'm finding the -10 is really fun to fly!

 

 Thanks,

 Jay

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=393092#393092

carl.froehlich(at)verizon
Guest

Posted: Sat Jan 26, 2013 3:51 pm Post subject: Pesky heavy left wing

Recommend first rigging the flaps to be exactly correct - both flush with the underside of the fuselage.  From there start your other rigging checks.  Hopefully this will get you on the right path.  If you find you do have a twisted flap, then don’t rig the aileron tailing edge to be in line with the offending flap.  Rig the ailerons using a straight edge such that they match.  This will mitigate a twisted flap problem.

 

Below are a couple of earlier posts I made on rigging that you may find useful.

 

Carl

 

 60 hours on the RV-10 and one long cross country.  Here are some recent tweaks that I’ve incorporated:

<![if !supportLists]>-          <![endif]>Added a .063” shim under the forward HS spar.  This moved the elevators to a better trail position in cruise.  I had a .040” shim in for 10 hours or so.  It helped but was not quite enough.  Even with this larger shim I have more nose up trim authority than I will ever need.  With anything other than forward CG conditions however the elevators are still slightly trailing edge down.  This calls for a larger shim but the .063” is about all I want to do for now as more may force an empennage fairing adjustment and/or re-hanging the rudder.  For those wondering, my W&B is typical of other RV-10s.

<![if !supportLists]>-          <![endif]>Right wing slightly heavy.  Not so bad that aileron trim would not fix, but not right.  After some careful measurements I found the right aileron inboard hinge placed the aileron slightly high (as compared to the outboard hinge and the left aileron).  I lowered the inboard side of the aileron .032” or so and this resolved the wing heavy issue.

<![if !supportLists]>-          <![endif]>Ball not centered.  I chased my tail on this for some time.  With the wheel pants and gear leg fairing off the ball is dead center.  Various tweaks on the pants and fairings either had the ball ½ out left or right.  After several tries it is now dead center (and just finished final pant and fairing paint today).  Some take-aways for those working this issue:

<![if !supportLists]>o   <![endif]>The fairing adjustments are far more critical than the wheel pants at affecting the ball.  Set the wheel pants as close as possible, then make all adjustments to the fairings after that.

<![if !supportLists]>o   <![endif]>The Van’s instructions lead you to think you can mount the wheel pants with the plane on the gear.  I don’t recommend this.

<![if !supportLists]>o   <![endif]>You can never be too accurate setting up to check the fairing rig.  A 1/16” move of the fairings trailing edge equals ¼ ball or so.

<![if !supportLists]>-          <![endif]>Don’t paint the pants or fairings until after you are flying.

<![if !supportLists]>-          <![endif]>Add the “reinforcement glass” to the nose gear wheel pant (there was a recent thread on this).  After mine cracked, I added two layers of carbon fiber to the inside, ground out the crack and filled it in with flox, sanded then two layers of regular glass on the outside over the crack.  This was followed by the normal “micro-balloon and sand until you puke” routine.

 

As already mentioned, check the aileron height (compare left/right at inboard and outboard attach points using a straight edge running aft off the wing).  A very small difference between aileron heights will make a big difference – and just how heavy the wing is will be dependent on speed.  I found this problem in several heavy wing RVs, including my RV-8A.  Moving the offending attachment point completely solve my problem on the 8A.

 

Other things to look at:

<![if !supportLists]>-          <![endif]>Do not assume that if the ailerons (in neutral position) are even with the flaps (in reflex position) that they are rigged correctly as there may be a slight twist in the flap.  Put the flaps in the reflex position, clamp one aileron to the flap, then compare using a straight edge running aft off the wing the two ailerons deflection.  If there is a difference, adjust the push rods until they are exactly the same. 

<![if !supportLists]>-          <![endif]>Do the same straight edge measurement on the flaps to compare.  If you do have a slight twist in a flap, I would expect that you can compensate for it if the ailerons are symmetrically rigged as they provide the higher moment arm.

<![if !supportLists]>-          <![endif]>Once you have the ailerons at the same deflection, then look at the wingtips.  When building the wingtips you can move the wingtip tailing edge up or down a good quarter of an inch when fitting the aft rib.

 

Of note, the easy tone in Van’s instructions on rigging the aircraft never seemed right for me.  After chasing my tail on a heavy wing I went back to basics as discussed above and found the small difference in aileron mount height.  Rigging is a big deal – and something that few will get right on the first attempt.

 

 

--

rene(at)felker.com
Guest

Posted: Sat Jan 26, 2013 4:04 pm Post subject: Pesky heavy left wing

After my first flight....I checked my flaps because I had a heavy left wing.

I used an electronic level and compared the flap to the wing and found one

flap was 1 degree higher than the other when in reflect.  I made them

equal....I think it helped.  But, I think my bigger problem was fuel

imbalance....I was using the right tank and I am not all that skinny....When

flying solo I always run the left tank down first...



Rene'

N423CF

801-721-6080



--

bill.peyton

Joined: 19 Sep 2010
Posts: 198
Location: St. Louis, MO

Posted: Sun Jan 27, 2013 6:14 am Post subject: Re: Pesky heavy left wing

First I would verify that you indeed have twist in the flap.  Use a long straight edge.  If you do, depending on how bad, you can build a new flap, or live with it and rig the ailerons as pointed out above.  As stated above, the flap should be even with the fuse on the retract position. You should not run the flap down to attempt to match the two.  The flap actuator mechanism is not designed to carry the lift load at cruise speeds beyond the ~125kt limitation called out in the installation manual.  They need to to be nested in cruise.



I too had a heavy wing on the left side.  Mine was due to the aileron hinge attach bracket.  My left leading edge inside bracket was 1/16" to high.  I re-drilled the holes in a new bracket and shifted them 1/16", re-installed and my wing heavy is gone.  It doesn't take much.  This situation can be checked with a straight edge also.



I also find that if you have as much as a 5 gallon fuel differential you will notice a wing heavy.

_________________
Bill
WA0SYV
Aviation Partners, LLC

larkrv10(at)gmail.com
Guest

Posted: Sun Jan 27, 2013 7:05 pm Post subject: Pesky heavy left wing

Just to add further to "checking for flap twist".  A really easy and simple way to check is to use "winding sticks".  It's an old  technique woodworkers used.   Search in google for the details.

  

Rick

#40956

Southampton, Ont

On Sun, Jan 27, 2013 at 9:14 AM, bill.peyton <peyton.b(at)sbcglobal.net (peyton.b(at)sbcglobal.net)> wrote:

 [quote]--> RV10-List message posted by: "bill.peyton" <peyton.b(at)sbcglobal.net (peyton.b(at)sbcglobal.net)>

  

 First I would verify that you indeed have twist in the flap.  Use a long straight edge.  If you do, depending on how bad, you can build a new flap, or live with it and rig the ailerons as pointed out above.  As stated above, the flap should be even with the fuse on the retract position. You should not run the flap down to attempt to match the two.  The flap actuator mechanism is not designed to carry the lift load at cruise speeds beyond the ~125kt limitation called out in the installation manual.  They need to to be nested in cruise.

  

 I too had a heavy wing on the left side.  Mine was due to the aileron hinge attach bracket.  My left leading edge inside bracket was 1/16" to high.  I re-drilled the holes in a new bracket and shifted them 1/16", re-installed and my wing heavy is gone.  It doesn't take much.  This situation can be checked with a straight edge also.

  

 I also find that if you have as much as a 5 gallon fuel differential you will notice a wing heavy.

 

 --------

 Bill

 WA0SYV

 Aviation Partners, LLC

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=393127#393127

 

 

 

 

 

 

 

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 [b]

bcondrey

Joined: 03 Apr 2006
Posts: 580

Posted: Mon Jan 28, 2013 4:42 am Post subject: Pesky heavy left wing

In this case there's no question that it has a twist (I saw it before the wings were mounted). Â My best guess is that the skins are quite symmetrical and one is flipped. Â Aside from a twist, the Hines on that flap aren't in perfect alignment. 

Jay: pull the inner hinge bolts on the flaps. Â The one that pops out out of alignment is the offending flap.

Bob



On Sunday, January 27, 2013, Rick Lark  wrote:

[quote] Just to add further to "checking for flap twist".Â Â A really easy and simple way to check is to use "winding sticks".Â  It's an oldÂ  technique woodworkers used.Â Â  Search in google for the details.

  Â 

Rick

#40956

Southampton, Ont

On Sun, Jan 27, 2013 at 9:14 AM, bill.peyton <[url=javascript:_e({}, 'cvml', 'peyton.b(at)sbcglobal.net');]peyton.b(at)sbcglobal.net[/url]> wrote:

   	  Quote: 	
		  --> RV10-List message posted by: "bill.peyton" <[url=javascript:_e({}, 'cvml', 'peyton.b(at)sbcglobal.net');]peyton.b(at)sbcglobal.net[/url]>

   

 First I would verify that you indeed have twist in the flap. Â Use a long straight edge. Â If you do, depending on how bad, you can build a new flap, or live with it and rig the ailerons as pointed out above. Â As stated above, the flap should be even with the fuse on the retract position. You should not run the flap down to attempt to match the two. Â The flap actuator mechanism is not designed to carry the lift load at cruise speeds beyond the ~125kt limitation called out in the installation manual. Â They need to to be nested in cruise.

   

 I too had a heavy wing on the left side. Â Mine was due to the aileron hinge attach bracket. Â My left leading edge inside bracket was 1/16" to high. Â I re-drilled the holes in a new bracket and shifted them 1/16", re-installed and my wing heavy is gone. Â It doesn't take much. Â This situation can be checked with a straight edge also.

   

 I also find that if you have as much as a 5 gallon fuel differential you will notice a wing heavy.

 

 --------

 Bill

 WA0SYV

 Aviation Partners, LLC

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=393127#393127

 

 

 

 

 

 

 

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 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

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[b]

hotwheels

Joined: 01 Jun 2007
Posts: 240

Posted: Mon Jan 28, 2013 1:52 pm Post subject: Re: Pesky heavy left wing

Thanks to all that replied to my question. 



I closely examined both flaps in the reflex position over the weekend. The left flap inside edge is perfectly aligned to the bottom of the fuse skin. The right flap is about 1/2" lower than the fuse skin. I believe that explains the tendency towards rolling to the left. The weird thing is that I built both flaps side by side at the same time and didn't notice anything usual at the time. Both were primed, so if something got flipped it had to happen early on in the process.



I'll report back once I get the offender replaced. Hopefully, it will just be a pain in the wallet...



Cheers,

Jay

N433RV

bcondrey

Joined: 03 Apr 2006
Posts: 580

Posted: Mon Jan 28, 2013 2:23 pm Post subject: Pesky heavy left wing

While rare, it's possible that one of the skins has the holes incorrectly punched. Â As I recall, if you retract the flaps to reflex and look at how the wing trailing edge meets the flap you will also notice that it isn't parallel like the other side. 



Bob



On Monday, January 28, 2013, hotwheels  wrote:

[quote]--> RV10-List message posted by: "hotwheels" <[url=javascript:;]jaybrinkmeyer(at)yahoo.com[/url]>

  

 Thanks to all that replied to my question.

 

 I closely examined both flaps in the reflex position over the weekend. The left flap inside edge is perfectly aligned to the bottom of the fuse skin. The right flap is about 1/2" lower than the fuse skin. I believe that explains the tendency towards rolling to the left. The weird thing is that I built both flaps side by side at the same time and didn't notice anything usual at the time. Both were primed, so if something got flipped it had to happen early on in the process.

  

 I'll report back once I get the offender replaced. Hopefully, it will just be a pain in the wallet...

 

 Cheers,

 Jay

 N433RV

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=393195#393195

 

 

 

 

 

 

 

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 " target="_blank">http://www.matronics.com/Navigator?RV10-List

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 t="_blank">http://www.matronics.com/contribution

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 [b]

rene(at)felker.com
Guest

Posted: Mon Jan 28, 2013 2:45 pm Post subject: Pesky heavy left wing

Does your right flap contact the frame?  If so, it could be affecting the

rigging.....ask me how I know........mine was not that far down, I don't

think, but after clearing the contact area I was able to get both flaps the

same.  When I was doing the final fit of the flaps after the wing was on the

airframe, I trimmed the flap without it being connected to the flap motor

and linkage.  I think it cleared the frame then (close fit), but when I

connected up the linkage, after paint, it was contacting and holding the

flap down about 1 degree.



Rene' Felker

N423CF

801-721-6080



--

bwestfall

Joined: 22 Oct 2008
Posts: 131
Location: Portland, OR

Posted: Mon Jan 28, 2013 2:55 pm Post subject: Pesky heavy left wing

I'm just curios... Does anyone know the cost of replacing a flap?  I've got

a slight twist in one of mine but I'll certainly wait till (if ever) I fly

to determine wing heaviness.



Ben Westfall



--

hotwheels

Joined: 01 Jun 2007
Posts: 240

Posted: Mon Jan 28, 2013 3:03 pm Post subject: Re: Pesky heavy left wing

Frame? Do you mean does the flap contact the rear wing spar in the full up reflex position? Yes. There's ~1/8" gap between inboard edge of the flap and the fuse. The offending flap is about 1/2 lower than the fuse at the inboard edge. Nothing to do with the flap motor here. 



For the record, I knew something was amiss even with the flaps in the wing cradle. Called Vans and they said something like "fly it first and is and see if it's a problem".



Ordering parts for a single flap looks like ~$500 including shipping. 



Jay 





 	  rene(at)felker.com wrote: 	
		  Does your right flap contact the frame?  If so, it could be affecting the

rigging.....ask me how I know........mine was not that far down, I don't

think, but after clearing the contact area I was able to get both flaps the

same.  When I was doing the final fit of the flaps after the wing was on the

airframe, I trimmed the flap without it being connected to the flap motor

and linkage.  I think it cleared the frame then (close fit), but when I

connected up the linkage, after paint, it was contacting and holding the

flap down about 1 degree.



Rene' Felker

N423CF

801-721-6080



--

rene(at)felker.com
Guest

Posted: Mon Jan 28, 2013 3:19 pm Post subject: Pesky heavy left wing

I meant the inside edge and fuselage.  Well, it was an idea.



Rene' Felker

N423CF

801-721-6080

--

hotwheels

Joined: 01 Jun 2007
Posts: 240

Posted: Mon Jan 28, 2013 3:48 pm Post subject: Re: Pesky heavy left wing

Vans Tech Support suggested the following order to trim out heavy wing:



1. Verify current aileron rigging.

2. Add balsa wood trim tabs under right aileron and rudder. Attach with duct tape...

2. Attach gear fairings and wheel pants (rinse and repeat step 2)

3. If still no joy then consider replacing flap



Jay

EdKranz

Joined: 29 Dec 2010
Posts: 132
Location: Hastings, MN

Posted: Tue Jan 29, 2013 7:26 am Post subject: Pesky heavy left wing

Can you elaborate on what you saw that was amiss when the wings were in the cradles? I just bolted the flaps on to my wings (in the cradles). One flap had all three hinge holes align PERFECTLY, but the other had the center hole very slightly off. Very light pressure on the flap allowed the bolt to slide in, and I didn't think anything of it...  but now I'm wondering if something might be off. 

 



On Mon, Jan 28, 2013 at 5:03 PM, hotwheels <jaybrinkmeyer(at)yahoo.com (jaybrinkmeyer(at)yahoo.com)> wrote:

  [quote]

 For the record, I knew something was amiss even with the flaps in the wing cradle. Called Vans and they said something like "fly it first and is and see if it's a problem".[b]

_________________
Ed Kranz
RV10
Finishing
www.edandcolleen.com

hotwheels

Joined: 01 Jun 2007
Posts: 240

Posted: Tue Jan 29, 2013 7:58 am Post subject: Re: Pesky heavy left wing

Sorry to say, that was one symptom. One hole didn't quite line up. The other thing of note was that the aft edge of the flap was slightly off from the aileron... The flap trailing edge appeared to be straight, but that may not have been the root cause. I don't think there's really any better way to tell if something is off until you get the wings on and rigging done.



I've spoken to a couple people at Van's about this issue and no one seemed surprised by having a flap twist. Apparently, it's common.



Jay





[quote="EdKranz"]Can you elaborate on what you saw that was amiss when the wings were in the cradles? I just bolted the flaps on to my wings (in the cradles). One flap had all three hinge holes align PERFECTLY, but the other had the center hole very slightly off. Very light pressure on the flap allowed the bolt to slide in, and I didn't think anything of it... ï¿½but now I'm wondering if something might be off.ï¿½

flying-nut(at)cfl.rr.com
Guest

Posted: Tue Jan 29, 2013 8:11 am Post subject: Pesky heavy left wing

At least Vans didn't say 'We've never heard of that before.' 

Checking for twist is easy.  Tape a yardstick to the top of the flap at 

the fuselage end and another at the outer end and sight across the 

yardsticks.  Twist will show up significantly.  The trailing edge can be 

perfectly straight while there's twist in the flap or aileron.  I think 

the twist is the result of creep during the riveting process, but I'm no 

expert!!!

Linn



On 1/29/2013 10:58 AM, hotwheels wrote:

 	  Quote: 	
		   



 Sorry to say, that was one symptom. One hole didn't quite line up. The other thing of note was that the aft edge of the flap was slightly off from the aileron... The flap trailing edge appeared to be straight, but that may not have been the root cause. I don't think there's really any better way to tell if something is off until you get the wings on and rigging done.



 I've spoken to a couple people at Van's about this issue and no one seemed surprised by having a flap twist. Apparently, it's common.



 Jay





 [quote="EdKranz"]Can you elaborate on what you saw that was amiss when the wings were in the cradles? I just bolted the flaps on to my wings (in the cradles). One flap had all three hinge holes align PERFECTLY, but the other had the center hole very slightly off. Very light pressure on the flap allowed the bolt to slide in, and I didn't think anything of it... ï¿½but now I'm wondering if something might be off.ï¿½





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=393226#393226





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EdKranz

Joined: 29 Dec 2010
Posts: 132
Location: Hastings, MN

Posted: Tue Jan 29, 2013 10:14 am Post subject: Pesky heavy left wing

Linn and Bob,

Thanks for the input.

I did check for twist by taping a few levels to the flap bottom and using them as winding sticks. As far as I can tell, I don't have any "Twist". I can also sight down the aileron and flap trailing edge and it's straight and they are even with each other. I may just have a very slight bow at the spar of the flap or possibly even the rear spar of the wing. I'll look at it closer by seeing how far off the hinge point is and seeing how the flap is sitting against the top skin. It's a bit awkward with the wings sitting vertically in the cradles. 

 



Most likely, this is just my OCD flaring up! And there is most likely nothing I can or should do until I can see how the flaps sit against the fuse bottom... which is in a crate on a truck somewhere.

 



On Tue, Jan 29, 2013 at 10:20 AM, Bob Condrey <condreyb(at)gmail.com (condreyb(at)gmail.com)> wrote:

  	  Quote: 	
		  Ed,

    

 While it's a twist, calling it that causes people to assume that it's just a trailing edge issue.  In this case the hinge holes are actually misaligned and at least while the wings were in the cradles, you could look down the wing skin trailing edge and compare to the flap leading edge rivet line and see that there was an issue also.  To get the hinges to all align (while the wing was in the cradle), pressure had to be applied to the last hinge (my recollection is that it was about 3/8"=1/2" off.  That all implies that the flap spar itself has some twist to it but you'd expect that the leading edges and/or skins would have forced it out.  Best guess is that there's something amiss with a skin causing the twist but that's just speculation and without drilling the skins off, who knows.  Needless to say, the trailing edge also exhibits a twist.  His other flap is perfectly straight, so it's not like the L&R skins swapped and caused an issue.  

     

 Bob



	




--> RV10-List message posted by: Linn <flying-nut(at)cfl.rr.com (flying-nut(at)cfl.rr.com)>  At least Vans didn't say 'We've never heard of that before.'   Checking for twist is easy.  Tape a yardstick to the top of the flap at the fuselage end and another at the outer end and sight across the yardsticks.  Twist will show up significantly.  The trailing edge can be perfectly straight while there's twist in the flap or aileron.  I think the twist is the result of creep during the riveting process, but I'm no expert!!!  Linn 



  [quote][b]

_________________
Ed Kranz
RV10
Finishing
www.edandcolleen.com

larkrv10(at)gmail.com
Guest

Posted: Wed Jan 30, 2013 6:22 pm Post subject: Pesky heavy left wing

Hey Linn, that's the "winding stick " technique I previously mentioned.Â  I assume you use the yard stick on edge.Â  

Â 

Rick

#40956

Southampton, Ont

 On Tue, Jan 29, 2013 at 11:11 AM, Linn <flying-nut(at)cfl.rr.com (flying-nut(at)cfl.rr.com)> wrote:

[quote] --> RV10-List message posted by: Linn <flying-nut(at)cfl.rr.com (flying-nut(at)cfl.rr.com)>

 

 At least Vans didn't say 'We've never heard of that before.' 

 Checking for twist is easy. Â Tape a yardstick to the top of the flap at the fuselage end and another at the outer end and sight across the yardsticks. Â Twist will show up significantly. Â The trailing edge can be perfectly straight while there's twist in the flap or aileron. Â I think the twist is the result of creep during the riveting process, but I'm no expert!!!

  Linn

 

 On 1/29/2013 10:58 AM, hotwheels wrote:

  	  Quote: 	
		   --> RV10-List message posted by: "hotwheels" <jaybrinkmeyer(at)yahoo.com (jaybrinkmeyer(at)yahoo.com)>

 

 Sorry to say, that was one symptom. One hole didn't quite line up. The other thing of note was that the aft edge of the flap was slightly off from the aileron... The flap trailing edge appeared to be straight, but that may not have been the root cause. I don't think there's really any better way to tell if something is off until you get the wings on and rigging done.

  

 I've spoken to a couple people at Van's about this issue and no one seemed surprised by having a flap twist. Apparently, it's common.

 

 Jay

 

 

 

 

 [quote="EdKranz"]Can you elaborate on what you saw that was amiss when the wings were in the cradles? I just bolted the flaps on to my wings (in the cradles). One flap had all three hinge holes align PERFECTLY, but the other had the center hole very slightly off. Very light pressure on the flap allowed the bolt to slide in, and I didn't think anything of it.. ï¿½but now I'm wondering if something might be off.ï¿½

  

 

 

 

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