VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics


Go Back   VAF Forums > Main > RV General Discussion/News
Register FAQ Members List Calendar Today's Posts

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 03-24-2007, 10:03 AM
boom3's Avatar
boom3 boom3 is offline
 
Join Date: Dec 2006
Location: Sumner, WA
Posts: 722
Default Dimpling 2 Skins?

My wing kit is a week or so away so I have been working on my empennage fiberglass tips. I have predrilled the tips to 3/32 and am getting ready to drill them to 1/8, then dimple the skins and machine countersink the tips. My question is can I dimple the double skin where the elevator skin overlaps the counterweight skin? I think I have too but it seems kind of weird. Maybe I should have done it earlier? What do you think? The holes in question are the ones in the center without clekos.

Thanks!

__________________
Jeff Bloomquist
Sumner, WA
PP-ASEL, IR

RV-7A
Flying
1150 Hours
Reply With Quote
  #2  
Old 03-24-2007, 10:23 AM
bullojm1's Avatar
bullojm1 bullojm1 is offline
 
Join Date: Feb 2006
Location: Baltimore, MD
Posts: 1,039
Default

Jeff,
It shouldn't be a issue at all to dimple two skins. I had to do it recently on the wings on the rear spar/rib flange. Worked great. Other option is to countersink the holes for the shallow 120 degree rivets that go there (CS4-3's or something like that). Then you don't have to worry about dimpling, and you don't have to countersinking the fiberglass.
__________________
Mike Bullock
RV-7, Flying!
http://www.rvplane.com
EAA Technical Counselor
The Best FAA N-Number Availability Search Engine -TailNum.com
Reply With Quote
  #3  
Old 03-24-2007, 10:24 AM
Mel's Avatar
Mel Mel is offline
 
Join Date: Mar 2005
Location: Dallas area
Posts: 10,762
Default

Dimpling double skins is not a problem.
__________________
Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
Reply With Quote
  #4  
Old 03-24-2007, 11:34 AM
rvbuilder2002's Avatar
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,027
Default

As the education part of your project, may I suggest that you use a couple of pieces of .020 thick (or something close) scrap material and try it your self and see how it works.

This is not at all meant as a flame because you asked the question... just pointing out that in this age of the internet, it seems many of us builders don't do as much thinking for themselves as they used too.

It is my opinion that a lot of the info and advice passed along in these online forums is bad advice. As builders we need to think for our selves and "test" any advice provided by others (also not meant as a flame towards the guys that took the time to answer your question).

In answering your question...I agree with the other guys, that it will dimple just fine. If the two pieces of material were .032 thick it would not dimple as well but would still be acceptable. (but don't take my word for it )
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.

Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
Reply With Quote
  #5  
Old 03-24-2007, 11:50 AM
Robert M's Avatar
Robert M Robert M is offline
 
Join Date: Feb 2006
Location: South Carolina
Posts: 659
Default Double dimpling

......oh, and by the way, my rivets set better in the dimple after I dimpled the skins together. The left elevator was not done that way and the rivets sit in the dimple slightly "proud". When I dimpled the 2 skins together on the right side it made the rivet sit perfect to the skin.
__________________
"Pilots: Looking down on people since 1903"
(author unknown)
RV-9, N556RM, O-320, Dual PMags, Catto 3 blade.
FLYING since 2018
Mosquito XEL ready for flight
Reply With Quote
  #6  
Old 03-24-2007, 12:31 PM
boom3's Avatar
boom3 boom3 is offline
 
Join Date: Dec 2006
Location: Sumner, WA
Posts: 722
Default

Thanks everyone!
__________________
Jeff Bloomquist
Sumner, WA
PP-ASEL, IR

RV-7A
Flying
1150 Hours
Reply With Quote
Reply



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 03:27 AM.


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.