Matronics Email Lists :: View topic - Elevator Skin "bowing" and Rudder "Oil Canning"

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

Elevator Skin "bowing" and Rudder "Oil Canning"

Matronics Email Lists Forum Index -> RV-List

View previous topic :: View next topic

Author Message

gareywittich2000(at)yahoo
Guest

Posted: Mon Aug 25, 2008 10:52 am Post subject: Elevator Skin "bowing" and Rudder "Oil Canning"

Matt:



Thank you for your Matronic Web Site - GREAT help !!!



I have no experience with your "bowing" problem.



Do have a question for you about "Oil Canning" of the Rudder Skin and did you have the same problem ??



It occurs ONLY on the "right side" of the Rudder Skin:  If I press down on the Rudder Skin between Stiffener 1 and 2, it stays DOWN and between Stiffener 2 and 3 the Skin pops UP and stays popped UP.  Pressing down between Stiffener 2 and 3 (Skin stays down) and the Skin between Stiffener 1 and 2 pops up and stays that way.  Acts like the Skin is stretched.  Was VERY carefull with the Skin so as not to damage it during construction.  



Not sure if this will effect flight characteristics or is a common problem with other builders or can be a future fatigue problem.  Anybody have any experience or ideas or knowledge about this ?????

Thanks,  Garey Wittich  Santa Monica, CA

- 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

davist(at)xsinet.co.za
Guest

Posted: Wed Aug 27, 2008 6:34 am Post subject: Elevator Skin "bowing" and Rudder "Oil Canning"

Yes I also had the exact same experience.  Van's just shrugged their 

shoulders and asked how I riveted.  I have found another builder with the 

same problem also one who was not aware of the "oil canning" until I pointed 

it out.  All on the right!  I think their jig is slightly out or else the 

batches were made at different times of the year where maybe temperature 

differences had a part to play.  Before riveting, I un-clecoed the left skin 

and with the tension released, found the fit on the right to be perfect.



I managed to cure it somewhat by attaching a bit of left over stiffner angle 

across 4 or so of the skin stiffeners (like a bridge)  and glueing some foam 

blocks between this stffener angle and the skin to make it more rigid.  Not 

perfect but at least the skin returns to normal after been "popped"



Trevor RV-7 Cape Town



---

- 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

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