Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

RV 7 Wing alignment

Matronics Email Lists Forum Index -> RV-List

View previous topic :: View next topic

Author Message

lsbrv7a(at)yahoo.com
Guest

Posted: Tue Oct 03, 2006 5:52 pm Post subject: RV 7 Wing alignment

I have assembled both skins of my wing with clecoes (all of them, I'm glad mike has them on sale). 1 in 3 in spars and 1 in 2 along the ribs.  I have measured the wing and it may have 1/32 twist with no sag.  I have noticed that most of the builders need a lower jack to remove the sag, but as my wing sits it is straight.  

   

  Will it begin to sag once it is match drilled or being assemble for riveting with only one skin? Is this normal?

   

  Do not archive





Sherman Butler

RV-7a Wings

Idaho Falls

  [quote][b]

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

Bob Collins

Joined: 11 Mar 2006
Posts: 470
Location: St. Paul, Minnesota

Posted: Tue Oct 03, 2006 6:38 pm Post subject: RV 7 Wing alignment

Sherman:

     It can sag. Whether it will, who knows?  But when i did mine, I made sure ALL the skins were clecoed in place before I  match drilled. 

    

     Now, it 's possible that even once it's  all riveted, it can sag. It happens fairly often when people are putting their  fuel tanks on that they just don't get them to go down all the way. But one  crank of the jack and they pop into place. Why? Cuz even with everything  riveted, there's a slight sag in the middle.

  

     1/32" twist?   I don't think  that's going to hurt you. 

  

 Bob Collins

 St. Paul, Minn.



   From: owner-rv-list-server(at)matronics.com  [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of Sherman  Butler

Sent: Tuesday, October 03, 2006 8:50 PM

To:  rv-list(at)matronics.com

Subject: RV 7 Wing  alignment

 

 I have assembled both skins of my wing with clecoes (all of them, I'm glad  mike has them on sale). 1 in 3 in spars and 1 in 2 along the ribs.  I have  measured the wing and it may have 1/32 twist with no sag.  I have noticed  that most of the builders need a lower jack to remove the sag, but as my wing  sits it is straight.  

  

 Will it begin to sag once it is match drilled or being assemble for  riveting with only one skin? Is this normal?

  

 Do not archive





Sherman Butler

RV-7a Wings

Idaho  Falls 

[quote]



href="http://www.matronics.com/Navigator?RV-List">http://www.matronics.com/Navigator?RV-List

href="http://forums.matronics.com">http://forums.matronics.com

href="http://wiki.matronics.com">http://wiki.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c

[b]

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

_________________
Bob Collins
St. Paul, Minn.
Letters from Flyover Country
http://rvnewsletter.blogspot.com/

jim jewell

Joined: 09 Jan 2006
Posts: 82
Location: Kelowna B.C. Canada

Posted: Tue Oct 03, 2006 8:34 pm Post subject: RV 7 Wing alignment

Hi Sherman,

  

 If you push the wing straight (resolve the 1/32'  twist) before you match drill it while also supporting the sag prone area  your wings should come out very straight after the match drilling.

  

 To straighten the twist, remove enough of the  clecoes over the whole area to allow the wing to be straightened then match  drill holes checking for straightness as you go. Clecoe the match  drilled holes and all will be well and good.

  

 I have seen structure built with a small twist that  unfortunately turned out to be up on one wing and down on the other. the  result was the need for a trim tab to compensate for the twist. If discovered  too late during the build process  a trim tab is often easier than drilling out allmost if not all the rivets,  correcting the twist, redrilling the holes and then riveting the structure over  again.

  

 Happy building,

  

 Jim in Kelowna

  

  

  

  

 [quote]   ---

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

_________________
"I never make mistreaks"

Display posts from previous:

	Matronics Email Lists Forum Index -> RV-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum