VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics


Go Back   VAF Forums > Model Specific > RV-8/8A
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 12-04-2017, 01:16 PM
goatflieg's Avatar
goatflieg goatflieg is offline
 
Join Date: Jul 2013
Location: Clarkston, MI
Posts: 314
Default Tip: Bending Windscreen Support Weldment

Most builders have had fit issues with weldments at some point. I had a fairly major one with my WD-814 windscreen support/roll bar. When I test fit it initially, it had the usual problems; the forward part of the triangular gussets were raised up a bit, and it didn't fit very well between the vertical tabs and the fuselage cockpit rails. If I snugged up one side, it left me with a 5/16" gap between the tab and the rail on the other side. That's quite a gap:

I checked for possible solutions here, but didn't find much info on the side-to-side issue, so I called Van's builder support. They said it was a common problem and that I should definitely spread the hoop slightly so that the tabs will fit the fuselage. We discussed various ways to do this. I had tried the "armstrong" method of holding one end down on a padded surface with my foot and pulling upward... but I knew right away my back wouldn't care much for that. So I did some thinking... and came up with this solution. I used my cherry picker; securing a chain around the base, wrapping tie-down straps around either side of the hoop and securing them to the base chain and lifting hook, and carefully extending the boom to stretch the hoop:

I would stretch it a bit, let it spring back, and check measurements:

Eventually, after a couple bending sessions and a couple test-fits, I got it to fit just right:

I was so happy with the result, I wanted to share it right away. Van's said that the triangulated braces would probably pull together with the canopy rails with the bolts tightened; if I do any tweaking to those, I'll also share it here.
__________________
Martin J Filiatrault
Clarkston, MI
RV-8 #83507 - empennage complete (except fiberglass)
QB wings & fuselage work continues
N657AR reserved
Builder websites:
http://goatflieg.blogspot.com/
http://www.mykitlog.com/goatflieg/
Dues paid for 2017... extra payment included for psychological therapeutic services rendered.

_______________________

Have you ever gotten the feeling you were smarter than you could ever prove?
Reply With Quote
  #2  
Old 12-04-2017, 07:48 PM
greghughespdx greghughespdx is offline
 
Join Date: Nov 2011
Location: Hillsboro, OR
Posts: 398
Default

Yep, I did something similar and found that the bolts snugged everything up to the rails quite well once tightened down properly.
__________________
Building RV-8A as of September 2014 (N88VX reserved)
VAF build thread - Flickr project photo album - Project Facebook page

Flying a Warrior PA28-151 and a few RVs here and there
TeenFlight program mentor
Exempt, but paid anyhow
Hillsboro, Oregon (EAA 105)
Reply With Quote
  #3  
Old 12-04-2017, 08:05 PM
Stoo Stoo is offline
 
Join Date: May 2006
Location: LL10, Naperville, IL.
Posts: 47
Default

Good tip, Martin! The roll bar on my 6 slider needed to be tweaked the other way. Used my floor mount drill press as a big arbor press to make it fit!
Stewart Willoughby, 6 panel/wiring
Reply With Quote
  #4  
Old 12-04-2017, 08:06 PM
Neal Trombley Neal Trombley is offline
 
Join Date: Aug 2016
Location: North Fort Myers
Posts: 209
Default

pure genius
__________________
Neal Trombley
SW Florida
EAA 66
N517NC ( reserved)
Dues Paid
NOV 2016
July 2017
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 07:47 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.