VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

  #1  
Old 11-18-2019, 12:37 AM
sinflrobot sinflrobot is offline
 
Join Date: Sep 2018
Location: Pflugerville
Posts: 35
Default Rudder Damage from Wind

Some wind got a hold of my rudder during the last front that came through. Overall it still appears straight, but I am a bit concerned about what to do with two small tears in the trailing edge. It doesn't look horrible, but I was wondering what more experienced folks think the best way to repair this is.



(Its an RV6A, so it doesn't have the riveted in trailing edge wedge.)
__________________
Jeremy
Austin, TX / Telluride, CO
RV-6A-- N900KH
Reply With Quote
  #2  
Old 11-18-2019, 01:30 AM
rv8ch's Avatar
rv8ch rv8ch is offline
 
Join Date: Feb 2005
Location: LSGY
Posts: 4,315
Default rebuild

I hate to be "that guy", but a really bad outcome started with a post like this a couple of years ago. Check with the factory, but if it were me, I'd just rebuild it.
__________________
Mickey Coggins
http://rv8.ch
"Hello, world!"
Reply With Quote
  #3  
Old 11-18-2019, 02:53 AM
KayS KayS is offline
 
Join Date: Jul 2009
Location: lake constance
Posts: 414
Default

Jeremey, are the damaged spots on top of the rudder and right at the trim sheet cracks?
Reply With Quote
  #4  
Old 11-18-2019, 06:31 AM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 6,320
Default Build a new one.

This airplane is grounded!! Looking at the TE, it looks like a tear right in the zone where separations have occurred, this definitely needs a new rudder built, very serious.

Call Vans for just how far you go, then get transferred to "order" a new kit. Maybe they will say the spar a ribs are OK. Also check the VS for any damage on the front spar connection to the HS spar.
__________________
Bill

RV-7

Last edited by BillL : 11-18-2019 at 06:38 AM. Reason: emphasis on grounding the plane.
Reply With Quote
  #5  
Old 11-18-2019, 06:45 AM
DanH's Avatar
DanH DanH is offline
 
Join Date: Oct 2005
Location: 08A
Posts: 10,352
Default

Grounded +1
__________________
Dan Horton
RV-8 SS
Barrett IO-390
Reply With Quote
  #6  
Old 11-18-2019, 07:34 AM
wilddog wilddog is offline
 
Join Date: Feb 2008
Location: va.
Posts: 674
Default F

Check your elevator for damage where it contacted the rudder TE. Agree with other posters, new skin at minimum.
Reply With Quote
  #7  
Old 11-18-2019, 08:15 AM
gmkonrad's Avatar
gmkonrad gmkonrad is offline
 
Join Date: Feb 2005
Location: Howell,MI
Posts: 158
Default rudder

Check your PM's.

Gary
__________________
Gary
RV-7 FLYING
N319GK
Reply With Quote
  #8  
Old 11-18-2019, 08:44 AM
rockwoodrv9 rockwoodrv9 is online now
 
Join Date: Dec 2011
Location: Meridian ID, Aspen CO, Okemos MI
Posts: 2,861
Default

Im having a hard time figuring out how the rudder got damaged along the trailing edge. I didnt think it was possible to contact the elevator at that point.

What else did it hit?
__________________
rockwoodrv9a
Williamston MI
O-320 D2A
Flying N376E
Reply With Quote
  #9  
Old 11-18-2019, 09:22 AM
Sam Buchanan's Avatar
Sam Buchanan Sam Buchanan is offline
been here awhile
 
Join Date: Dec 2004
Location: North Alabama
Posts: 4,465
Default

Quote:
Originally Posted by rockwoodrv9 View Post
Im having a hard time figuring out how the rudder got damaged along the trailing edge. I didnt think it was possible to contact the elevator at that point.

What else did it hit?
My thoughts exactly, the long scratch is where the elevator would contact the rudder. Has the rudder been flexed sufficiently to crack the trailing edge?
__________________
Sam Buchanan
RV-6
Reply With Quote
  #10  
Old 11-18-2019, 09:32 AM
rvbuilder2002's Avatar
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,662
Default

Quote:
Originally Posted by rockwoodrv9 View Post
Im having a hard time figuring out how the rudder got damaged along the trailing edge. I didnt think it was possible to contact the elevator at that point.
Inertia
The entire mass of the rudder is moving rapidly to one side but then is instantaneously stopped by the rudder stop at one end.
The remaining mass of the rudder attempts to stay in motion which puts a twist load on the rudder. This is also how the indentations from the trailing edge of the elevators occur, even though there was likely clearance between the rudder and elevators at full travel.
The issue is amplified even more if it is a rudder with a counter balance weight.

It looks like this one might be a later rudder with the counter balance. If so, it would be an easy repair because it would essentially involve removing the skin and installing a new pre-punched RV-8 rudder skin.

If it is an early vintage (short) rudder, removing the skin and match drilling a new one would still be the simplest repair because the hinge points were established by the builder based on dimensions. It would be far easier to reuse the same sub-structure frame than making a new one that would properly fit the vertical stab.

I agree that the rudder should be replaced before further flight.
If it needs to be ferried, a light weight bent patch could be made and installed with blind rivets. It would be prudent to reduce speed slightly for the ferry flight.
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.

Scott McDaniels
Hubbard, Oregon
Van's Aircraft Engineering Prototype Shop Manager
FAA/DAR
RV-6A (aka "Junkyard Special ")
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 07:34 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.