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
  #11  
Old 08-12-2015, 10:58 AM
sblack sblack is offline
 
Join Date: Dec 2009
Location: Montreal
Posts: 1,456
Default

what is the point of putting an oops rivet in the hole in the spar? If it is on the tension side there won't be any increase in strength. Isn't the objective just to ensure the hole is clean with no cracks? Once you have done that what does filling in the hole accomplish?
__________________
Scott Black
Old school simple VFR RV 4, O-320, wood prop, MGL iEfis Lite
VAF dues 2020
Instagram @sblack2154
Reply With Quote
  #12  
Old 08-12-2015, 12:07 PM
clutch22 clutch22 is offline
 
Join Date: Jul 2012
Location: Bartlesville, OK
Posts: 237
Default

Quote:
Originally Posted by sblack View Post
what is the point of putting an oops rivet in the hole in the spar? If it is on the tension side there won't be any increase in strength. Isn't the objective just to ensure the hole is clean with no cracks? Once you have done that what does filling in the hole accomplish?
Filling an open hole reduces the stress concentration at that location. Plugging a hole with a rivet will not allow the hole to deform in extreme loading situations and thus will be less likely to fatigue. Scott, I'm sure it would be fine to leave it open, but that's just what I would do with my airplane if I decided to fix it.

By the way, I agree Sam if you decide to replace that spar. It would be easy. I would go ahead and cleco the dimpled skin to the holes so that everything is match drilled. I know the prepunched holes are accurate, but it can be annoying when rivets don't want to seat all the way in the dimple because holes don't want to align 100%.

Oh yeah, and I don't like hearing about dimples being flattened. It reminds me of bending a paperclip a few times...

Sam, did you ever hear back from Van's?
__________________
Andrew Austin

RV-10
-Flying!
Reply With Quote
  #13  
Old 08-12-2015, 01:26 PM
sritchie sritchie is offline
 
Join Date: Jun 2015
Location: Boulder, CO
Posts: 130
Default

Quote:
Originally Posted by clutch22 View Post
Sam, did you ever hear back from Van's?
Hey guys,

I gave Van's a call this morning; the engineer at builder support recommended that I file the hole out to the edge of the crack, make a little doubler that captured this dimple and a rivet on either side, dab a little proseal on the crack before squashing it then just proceed. That should stop any crack propagation.

Haha, as has happened every time I've called builder support, the tone was very much "This happens ALL the time, and there's no way you can just trash a part every time you run into something like this." If it were earlier in the process I'd probably have just ordered a new one right away, as I said, but it's really good hearing this from the Van's.

So! That's the plan. I made my doubler this morning, filed the hole out to the end of the little cracked piece, and everything is nice and rounded now. No crack, and the doubler should provide the extra metal for strength.

Thanks all for your advice!
Reply With Quote
  #14  
Old 08-13-2015, 09:39 AM
bill@fusion4.net's Avatar
bill@fusion4.net bill@fusion4.net is offline
 
Join Date: Feb 2011
Location: Suwanee, GA
Posts: 415
Default

Quote:
Originally Posted by RV7AJeremy View Post
If you have already dimpled the skin, I would just drill the spar to final size and dimple it. These pre-punched kits are extreamly accurate.

Like most others, I would replace the part; helps me sleep better at night for realitavly little money.
Plus 1 for this.
__________________
Bill Thomasson
RV-10 - Flying - Phase II. 99.8% done... it's never really done!
http://sites.google.com/a/fusion4.net/rv10/
Suwanee, GA.
Reply With Quote
  #15  
Old 08-14-2015, 08:24 PM
The Wizzard's Avatar
The Wizzard The Wizzard is offline
 
Join Date: Nov 2009
Location: Cincinnati, Ohio
Posts: 149
Default 2 rivets

you can clean up the hole and put a rivet on both sides of it as well if you have the clearances.
__________________
Dave Cicciari
3 Paper Airplanes and counting, Honorary "President of The United States of Love"
Dues Paid
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 08:53 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.