 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 26321
Location: Livermore CA USA
|
 Posted: Sat Aug 23, 2008 3:53 pm Post subject: Elevator Skin Trailing Edge Bowing... |
 |
|
Dear Listers,
Backing into the garage today I noticed the elevator skin bowing at
the trailing edge in the review mirror because of the way the light
was hitting it. Basically what the deal is I think is that I bent
the trailing edge of the elevators more than necessary. So, when I
pulled the leading edge apart to fit it over the spar, I now have a
concave bowing effect between some of the bays. Van's goes to great
lengths in the manual to make sure that bend the elevator trailing
edges *enough*, but doesn't make mention of what is "too much". The
radius of the trailing edge is still within spec and there is no
cracking or stress marks. Its just bent too much and looks like of
stupid. Somehow, I did the rudder perfectly, but both elevators
suffer from the effect. I've included some pictures below.
What the common thought on this issue? Are the safety/flutter issues
with over-bending as I have done? What to do...?
Thanks!
Matt Dralle
RV-8 #82880
RV-8 Fuse/Wing QB Kit Delivery Next Week! (Ordered May 20 2008)
| | - The Matronics RV10-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?RV10-List |
|
| Description: |
|
| Filesize: |
92.39 KB |
| Viewed: |
199 Time(s) |
|
| Description: |
|
| Filesize: |
88.98 KB |
| Viewed: |
209 Time(s) |
|
| Description: |
|
| Filesize: |
75.74 KB |
| Viewed: |
230 Time(s) |
|
_________________
Matt Dralle
Matronics Email List Administrator |
|
| Back to top |
|
 |
nukeflyboy
Joined: 05 Jan 2008
Posts: 162
Location: Granbury, TX
|
| Posted: Sun Aug 24, 2008 3:12 am Post subject: Re: Elevator Skin Trailing Edge Bowing... |
|
|
Matt,
On the RV-10, the elevator is a 3-piece rivited trailing edge. I am not that familiar with the RV-8 but it looks like my RV-6. I have never heard of any flutter issues on the elevator due to this condition and your problem appears to be primarily esthetic. Bending the trailing edges is always a little tricky and on the ailerons, too little (or too much) can cause one wing to be "heavy". Van talks about this in the manual and you can correct the heavy wing by pinching the trailing edge, ie, make the radius smaller. The slight bowing on the skin is also of no concern, and under flight loads the skins will do this regardless.
Since your radius is within spec, I don't see a safety issue here. The only problem is is whether or not you can live with it.
| | - The Matronics RV10-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?RV10-List |
|
_________________
Dave Moore
RV-6 built and sold
RV-10 built and flying |
|
| Back to top |
|
|
wcurtis(at)nerv10.com
Guest
|
| Posted: Sun Aug 24, 2008 7:20 am Post subject: Elevator Skin Trailing Edge Bowing... |
|
|
Yeah, this happened to my first trim tabs. Fortunately, or un, the trim tab is the only flying surface of the -10 that uses this construction technique. Us 9 & 10 builders have the AEX extrusion and Proseal to contend with for our flying surfaces with their own "got ya's." With the trim tabs, I created a brake from 2X4 to provide a more continuous mold while curing than the V brackets called for in the plans.
William
http://nerv10.com/wcurtis/
------
| | - The Matronics RV10-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?RV10-List |
|
|
|
| Back to top |
|
|
|
|
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
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
