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
  #21  
Old 08-01-2018, 08:11 AM
joedallas's Avatar
joedallas joedallas is offline
 
Join Date: May 2010
Location: Spring Hill Fl
Posts: 711
Default Aluminum Tie Down Rings

I will fly with my tie down rings







http://joesrv12.com/Builder%20Log/al_20_01.htm

Joe Dallas
__________________
Joe Dallas
Kit-#12400
www.joesrv12.com
www.EAA1298.com

Last edited by joedallas : 08-01-2018 at 08:13 AM.
Reply With Quote
  #22  
Old 08-01-2018, 09:19 AM
rocketman1988 rocketman1988 is offline
 
Join Date: Jun 2010
Location: Sunman, IN
Posts: 1,140
Default Nice!

Those are nice. Be sure to use a lubricant on the threads as aluminum/aluminum tends to gall pretty easily...
__________________
Bob
Aerospace Engineer '88

RV-10
Structure - 90% Done
Cabin Top - Aaarrghhh...
Doors - Done
On Gear
290 HP Barrett Hung
ShowPlanes Cowl with Skybolts Fitted - Beautiful
Wiring...

Dues Paid 2018,...Thanks DR+
Reply With Quote
  #23  
Old 08-01-2018, 03:00 PM
Bob Y Bob Y is offline
 
Join Date: Jul 2017
Location: Piedmont, SC
Posts: 19
Default

So no concern regarding the strength of those using aluminum? Shear strength if side loaded when tied down in a heavy wind? And there is a gap between the bottom of my threaded tie down extrusion and the bottom surface of my wing skin. Do you have a sleeve spacer around the top of the bolt?
Reply With Quote
  #24  
Old 08-01-2018, 09:49 PM
DaveWelch DaveWelch is offline
 
Join Date: Mar 2005
Location: Huntsville, AL
Posts: 316
Default

Very very nice Joe. Much better look than those cheesy steel loops I got Lowe’s aviation supply. So...what would a fellow -12 builder have to spend to obtain 3 of ‘em? If you just want to “rough them out” then I’ll do the finishing and polish.
__________________
Dave
RV12 N951DZ
First Flight 9/23/16!
No paint yet. Working on a scheme with John Deere colors or accents.
Reply With Quote
  #25  
Old 08-01-2018, 09:54 PM
DaveWelch DaveWelch is offline
 
Join Date: Mar 2005
Location: Huntsville, AL
Posts: 316
Default The OP question

I keep the wing tie downs in the map box and leave the tail one installed. It has saved some skin scrapes while loading on a trailer.
Hadn’t thought about the corrosion, now I’ll have to go look.
__________________
Dave
RV12 N951DZ
First Flight 9/23/16!
No paint yet. Working on a scheme with John Deere colors or accents.
Reply With Quote
  #26  
Old 08-01-2018, 11:22 PM
Tony_T's Avatar
Tony_T Tony_T is offline
 
Join Date: Dec 2008
Location: Lacey, WA
Posts: 1,218
Default

I took my tail tie-down ring out today. It's been in there for 7 years. I use it to ground the airplane when fueling as well as a tie down. I installed it with Loctite on half of the threads. There was no corrosion.



The shiny part of the threads is where I cleaned the dry Loctite off. I also ran a 3/8 X 16 tap in the aluminum hole and it went in with only light force on the tap handle. It came back out quite clean with no evidence of corrosion.

I consider it a non-issue.
__________________
Tony
RV-12 #202 -- Flying
Reply With Quote
  #27  
Old 08-02-2018, 07:59 AM
joedallas's Avatar
joedallas joedallas is offline
 
Join Date: May 2010
Location: Spring Hill Fl
Posts: 711
Default Custom Parts

Thank Dave

My focus is finishing my aircraft and testing all the changes I have made to my 12.

I enjoy working on my Lathe and Milling machine.

I have had request for custom parts and I will make them for other builders after I finish my aircraft.

I will add a page to my web site and list the parts and drawings of custom Items available.

I will be starting my Jabiru 3300 Gen 4 engine soon and hope to be flying by November.

Joe Dallas







Quote:
Originally Posted by DaveWelch View Post
Very very nice Joe. Much better look than those cheesy steel loops I got Lowe’s aviation supply. So...what would a fellow -12 builder have to spend to obtain 3 of ‘em? If you just want to “rough them out” then I’ll do the finishing and polish.
__________________
Joe Dallas
Kit-#12400
www.joesrv12.com
www.EAA1298.com
Reply With Quote
  #28  
Old 08-02-2018, 08:54 AM
EXflyer EXflyer is offline
 
Join Date: Jan 2016
Location: Chiloquin OR
Posts: 86
Default Radius

I see no radius at the base of the threads it should have one there and another thing is the sharp root of the threads will be a weak point. If you notice the tie down ring shown it has rolled threads with no sharp root. Also if one uses a thread lube such as copper coat on the threads will take care of things.
Reply With Quote
  #29  
Old 08-02-2018, 09:07 AM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 3,586
Default

Joe, in post #21, you link to this photo:



If this is a sample of your tiedown rings, please, at least generously (as much as possible) round the edges of the rope hole. Rope has decreasing strength when the radius is small. In that sense it's a bit like aluminum.

Dave
Reply With Quote
  #30  
Old 08-02-2018, 02:21 PM
joedallas's Avatar
joedallas joedallas is offline
 
Join Date: May 2010
Location: Spring Hill Fl
Posts: 711
Default Details not in first post

There is a 1/4" at the end of the thread that is .374" and the hole in Vans bracket is taped to 1.5" deep using a 3/8" 16 Pulley tap and then Counter bored to 3.75 inches about 5/16" deep for the tail cone and on the wings they have a two step shank 7/16" 3/8" deep and the .374"1/4"deep to allow them to be in contact with vans Brackets and not contact the wing skins

Also I have chamfered the hole, However I use S hooks at the end of my tie down ropes


Quote:
Originally Posted by EXflyer View Post
I see no radius at the base of the threads it should have one there and another thing is the sharp root of the threads will be a weak point. If you notice the tie down ring shown it has rolled threads with no sharp root. Also if one uses a thread lube such as copper coat on the threads will take care of things.
__________________
Joe Dallas
Kit-#12400
www.joesrv12.com
www.EAA1298.com
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 05:10 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.