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Flap Chafing / Tape

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kearney

Joined: 20 Sep 2008
Posts: 563

Posted: Fri Jul 04, 2014 6:36 pm Post subject: Flap Chafing / Tape

Hi



I am looking at getting my -10 painted in a month or so. Over the past year I have noticed that the flaps chafe against the upper skin. My concern is that when everything is painted, the nonexistent gap between the flap and upper skin will become very tight.



I am planning on installing 3m tape but am wondering if I should open up the gap by putting a small upward bend in the skin.



Has anyone faced this problem and if so how did you deal with it.



Is there any preference to putting the tape on the flap or underneath the skin?



Is there any tape that is preferable?



Cheers



Les

rleffler

Joined: 05 Nov 2006
Posts: 680

Posted: Sat Jul 05, 2014 2:12 am Post subject: Flap Chafing / Tape

I installed tape on the bottom of the upper skin.   I installed it during final assembly after painting.    I made no adjustments to make the gap wider.   No problems or scratches after 1.5 years.



Bob



Sent from my iPad



 	  Quote: 	
		   On Jul 4, 2014, at 10:36 PM, "kearney" <kearney(at)shaw.ca> wrote:

 

 

 

 Hi

 

 I am looking at getting my -10 painted in a month or so. Over the past year I have noticed that the flaps chafe against the upper skin. My concern is that when everything is painted, the nonexistent gap between the flap and upper skin will become very tight.

 

 I am planning on installing 3m tape but am wondering if I should open up the gap by putting a small upward bend in the skin.

 

 Has anyone faced this problem and if so how did you deal with it.

 

 Is there any preference to putting the tape on the flap or underneath the skin?

 

 Is there any tape that is preferable?

 

 Cheers

 

 Les

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=426106#426106

_________________
Bob Leffler
N410BL - Phase I
http://mykitlog.com/rleffler

jesse(at)saintaviation.co
Guest

Posted: Sat Jul 05, 2014 4:03 am Post subject: Flap Chafing / Tape

Vans sells a tape that works great. It is definitely best to put it under the bottom skin, because it discolors and looks bad on the flap. I wouldn't bend the skin. The flap, when up, will bend the top skin ever so slightly, but this gives it a nice tight seal with no extra drag. 

Jesse Saint

Saint Aviation, Inc.

352-427-0285

jesse(at)saintaviation.com

Sent from my iPad

 	  Quote: 	
		   On Jul 5, 2014, at 6:11 AM, Bob Leffler <rv(at)thelefflers.com> wrote:

 I installed tape on the bottom of the upper skin.   I installed it during final assembly after painting.    I made no adjustments to make the gap wider.   No problems or scratches after 1.5 years.

 Bob

 Sent from my iPad

> On Jul 4, 2014, at 10:36 PM, "kearney" <kearney(at)shaw.ca> wrote:

> 

> 

> 

> Hi

> 

> I am looking at getting my -10 painted in a month or so. Over the past year I have noticed that the flaps chafe against the upper skin. My concern is that when everything is painted, the nonexistent gap between the flap and upper skin will become very tight.

> 

> I am planning on installing 3m tape but am wondering if I should open up the gap by putting a small upward bend in the skin.

> 

> Has anyone faced this problem and if so how did you deal with it.

> 

> Is there any preference to putting the tape on the flap or underneath the skin?

> 

> Is there any tape that is preferable?

> 

> Cheers

> 

> Les

> 

> 

> 

> 

> Read this topic online here:

> 

> http://forums.matronics.com/viewtopic.php?p=426106#426106

egohr1

Joined: 17 Jan 2006
Posts: 38
Location: Oklahoma City

Posted: Sat Jul 05, 2014 4:34 am Post subject: Re: Flap Chafing / Tape

I used the Vans tape and have not had any issues in the last 5 years.  Put the tape in the underside of the wing skin after paint.  As the others have said you will want the tight seal in reflex to reduce drag.

_________________
eric gohr
EGOHR86@alumni.carnegiemellon.edu

carl.froehlich(at)verizon
Guest

Posted: Sat Jul 05, 2014 5:26 am Post subject: Flap Chafing / Tape

I used the UHMW tape from Van's.  I put the tape on the flaps after paint,

the bottom of the tape flush with the wing skin with the flap in the up

position.  My thought was if the tape is on the bottom of the skin then if

any piece of grit got between the tape and the flap it would scratch the

paint on the flap.



I did the same on the 8A.  The tape lasted right at 10 years.  When I sold

the plane I replaced the tape by using just a little hot air gun to soften

it the tape but not the paint.  The replacement process took just a few

minutes.



I found other places to use the tape as well, like where the inboard rudder

peddle cable links come close to the sides of the tunnel.



Carl



--

arplnplt(at)gmail.com
Guest

Posted: Sat Jul 05, 2014 5:56 am Post subject: Flap Chafing / Tape

I opened the gap a bit and my painter installed the tape under the skin.

No issues.



Dave Leikam



On Jul 4, 2014, at 9:36 PM, kearney <kearney(at)shaw.ca> wrote:



 	  Quote: 	
		   

 

 Hi

 

 I am looking at getting my -10 painted in a month or so. Over the past year I have noticed that the flaps chafe against the upper skin. My concern is that when everything is painted, the nonexistent gap between the flap and upper skin will become very tight.

 

 I am planning on installing 3m tape but am wondering if I should open up the gap by putting a small upward bend in the skin.

 

 Has anyone faced this problem and if so how did you deal with it.

 

 Is there any preference to putting the tape on the flap or underneath the skin?

 

 Is there any tape that is preferable?

 

 Cheers

 

 Les

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=426106#426106

Leeverett

Joined: 07 Jan 2013
Posts: 14

Posted: Sat Jul 05, 2014 2:27 pm Post subject: Flap Chafing / Tape

Timely question for me. After 125 hrs I have a small line (1") of wear. I took it to the paint shop in Tusculoosa yesterday to have it touched up. The painter who did a great job  on the plane has recommended the tape under the trailing edge wing skin. Leon Everett

 	  Quote: 	
		   Subject: RV10-List: Flap Chafing / Tape

 From: kearney@shaw.ca

 Date: Fri, 4 Jul 2014 19:36:39 -0700

 To: rv10-list@matronics.com

 --> RV10-List message posted by: "kearney" <kearney@shaw.ca>

 Hi

 I am looking at getting my -10 painted in a month or so. Over the past year I have noticed that the flaps chafe against the upper skin. My concern is that when everything is painted, the nonexistent gap between the flap and upper skin will become very tight.

 I am planning on installing 3m tape but am wondering if I should open up the gap by putting a small upward bend in the skin.

 Has anyone faced this problem and if so how did you deal with it.

 Is there any preference to putting the tape on the flap or underneath the skin?

 Is there any tape that is preferable?

 Cheers

 Les

 Read this topic online here:

 http://forums.matronics.com/viewtopic.php?p=426106#426106

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  [quote][b]

Gordon Anderson

Joined: 16 Apr 2012
Posts: 41
Location: Switzerland

Posted: Sun Jul 06, 2014 11:19 am Post subject: Flap Chafing / Tape

Les,



The trailing edge of the upper skin was pretty wavy on my QB wings.  In reflex position I measured everything between gaps of 1/8" to interference of almost 1/8" which I considered a bit too much preload on the flap.  It is very easy to adjust these by hand to give a more or less uniform snug fit (ie. touching with very light preload) along the length of the flap.



Cheers,



Gordon

41015, Switzerland



On Jul 5, 2014, at 4:36 AM, kearney wrote:



 	  Quote: 	
		   

 

 Hi

 

 I am looking at getting my -10 painted in a month or so. Over the past year I have noticed that the flaps chafe against the upper skin. My concern is that when everything is painted, the nonexistent gap between the flap and upper skin will become very tight.

 

 I am planning on installing 3m tape but am wondering if I should open up the gap by putting a small upward bend in the skin.

 

 Has anyone faced this problem and if so how did you deal with it.

 

 Is there any preference to putting the tape on the flap or underneath the skin?

 

 Is there any tape that is preferable?

 

 Cheers

 

 Les

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=426106#426106

kearney

Joined: 20 Sep 2008
Posts: 563

Posted: Tue Jul 08, 2014 7:38 pm Post subject: Re: Flap Chafing / Tape

Hi 



Thanks to everyone for the chafing suggestion. I'll go with the tape under the wing skin.



Cheers



Les

rv10flyer

Joined: 25 Aug 2009
Posts: 364

Posted: Mon Jul 14, 2014 6:04 pm Post subject: Re: Flap Chafing / Tape

My tape is under the top skin as many above. 



The only things I can add are...



While flaps are down in the hangar, before every flight from home, clean and wax flap top leading edges where they contact tape. Clean tape too.



When landing on a wet grass strip like Triple Tree (SC00), do not retract muddy flaps past halfway until you shut down. Then clean them and the tape.

_________________
Wayne G.

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