VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics


Go Back   VAF Forums > Model Specific > RV-12
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #31  
Old 08-02-2018, 02:42 PM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 3,487
Default

Email sent to Joe.

Dave
Reply With Quote
  #32  
Old 08-02-2018, 08:27 PM
EXflyer EXflyer is offline
 
Join Date: Jan 2016
Location: Chiloquin OR
Posts: 79
Default OK?

So still no radius at the end of the threads and the threads are still sharp in the root. Every one on here worries about stress risers in scratches which are the same. Not putting down your design just saying that its a stress point when side loaded.
Reply With Quote
  #33  
Old 08-02-2018, 09:14 PM
AirHound AirHound is offline
 
Join Date: Oct 2006
Location: OFallon IL now, everywhere before
Posts: 207
Default

Quote:
Originally Posted by RFSchaller View Post
Doug,

The older fiberglass epoxies lost strength if overheated. The critical temp was called glass transition temperature, and 30 years ago people tried to avoid painting dark colors on the fiberglass so it wouldn’t sit in the sun and lose strength. In Phoenix we can actually fry an egg on a dark surface on the worst summer days. GTT was something you had to think about.
Thank you!
__________________
Doug
Reply With Quote
  #34  
Old 08-03-2018, 11:02 AM
joedallas's Avatar
joedallas joedallas is offline
 
Join Date: May 2010
Location: Spring Hill Fl
Posts: 701
Default Tie Down

With the angle less than 60° and the bolt is in a counter bore I can't see the loads needed to shear the 3/8" 2024 T3 Aluminum with a shock load from a tie down rope.
Also my aircraft is in a hanger 90% of the time.
I feel comfortable with this design.

Joe Dallas





Quote:
Originally Posted by EXflyer View Post
So still no radius at the end of the threads and the threads are still sharp in the root. Every one on here worries about stress risers in scratches which are the same. Not putting down your design just saying that its a stress point when side loaded.
__________________
Joe Dallas
Kit-#12400
www.joesrv12.com
www.EAA1298.com

Last edited by joedallas : 08-03-2018 at 04:39 PM.
Reply With Quote
  #35  
Old 08-03-2018, 11:54 AM
Piper J3's Avatar
Piper J3 Piper J3 is offline
 
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 964
Default Interesting Observation...

This thread ponders the the all-important question "Flying with or without wing tie down rings" and has 3,213 views and 33 replies.

The thread titled "Official Sensenich Propeller FAQ/Service Bulletin Revision B" only garnered 1,043 views and 6 replies.

Aren't folks worried about their props falling off?

Maybe its just the times we're living in...
__________________
-
Jim Stricker
Hinckley, Ohio
EAA #499867
PPL/ASEL 1970 Sport Pilot since 2004
80 hrs Flying Aeronca Chief 11AC
1130 hrs Flying 46 Piper J-3 Cub
RV-12 E-LSA #120058 AWC Jul 2012 - Bought Flying Oct 2015 with 48TT - Hobbs now 380

LSRM-A Certificate 2016
Special Thanks to EJ Trucks
Reply With Quote
  #36  
Old 08-03-2018, 03:25 PM
rv9builder rv9builder is offline
 
Join Date: Jan 2005
Location: Irvine, CA
Posts: 673
Default

Quote:
Originally Posted by Piper J3 View Post
This thread ponders the the all-important question "Flying with or without wing tie down rings" and has 3,213 views and 33 replies.

The thread titled "Official Sensenich Propeller FAQ/Service Bulletin Revision B" only garnered 1,043 views and 6 replies.

Aren't folks worried about their props falling off?

Maybe its just the times we're living in...
All RVs have tiedown rings. Only RV-12s are affected by the prop service bulletin. That's probably the reason for the higher number of views on this thread.
__________________
Mark
RV-12iS Fuselage
RV-9A Project: Sold

VAF donation made for 2018

Last edited by rv9builder : 08-03-2018 at 10:07 PM.
Reply With Quote
  #37  
Old 08-03-2018, 09:19 PM
RFSchaller RFSchaller is offline
 
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,264
Default

The prop issue has some authoritative discussion from the manufacturer and an SB, while the tie down ring issue is open to discussion without conclusive evidence. That probably lends itself to more discussion.
Reply With Quote
  #38  
Old 08-05-2018, 06:00 PM
DaveWelch DaveWelch is offline
 
Join Date: Mar 2005
Location: Huntsville, AL
Posts: 310
Default

Hi Joe,
We all fully understand your focus to finish and look forward to seeing your finished airplane!
Thanks,
Dave
__________________
Dave
RV12 N951DZ
First Flight 9/23/16!
No paint yet. Working on a scheme with John Deere colors or accents.
Reply With Quote
  #39  
Old 08-08-2018, 06:00 PM
RV8JD's Avatar
RV8JD RV8JD is offline
 
Join Date: Jan 2005
Posts: 839
Default

Quote:
Originally Posted by RFSchaller View Post
Doug,

The older fiberglass epoxies lost strength if overheated. The critical temp was called glass transition temperature, and 30 years ago people tried to avoid painting dark colors on the fiberglass so it wouldn’t sit in the sun and lose strength. In Phoenix we can actually fry an egg on a dark surface on the worst summer days. GTT was something you had to think about.
Quote:
Originally Posted by DanH View Post
Still do.....
Nothing to do with tie down rings, but interesting data in this note regarding the temperature differences between various colored fiberglass panels with epoxy resin:

http://www.soaridaho.com/Schreder/Co...olor_Temp.html

To my knowledge, the only fiberglass sailplane to be certified in a color other than white (except for a small amount of trim color) was the Eiri-Avion PIK-20. Because it was oven-cured at the factory, it was available in yellow, as well as white.
__________________
Carl N.
Arlington, WA (KAWO)
RV-8, 355 Tach Hours
(Pic 1),(Pic 2)
- Out with the Old, In with the New
(Pic)
RV-8, 1938 Tach Hours (Pic 1),(Pic 2) - Sold

Glasflügel Standard Libelle 201B, N564NS - Sold
Rolladen-Schneider LS1-f, N61MP - No longer owned
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 12:10 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.