VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics

  #11  
Old 09-10-2013, 09:18 AM
Low Pass's Avatar
Low Pass Low Pass is offline
 
Join Date: May 2006
Location: Houston
Posts: 2,012
Default

Quote:
Originally Posted by Daniel S. View Post
Looking at the plans, I'm wondering if the few that have mentioned installing secondary belts didn't just use the same anchor point(s)? Those should / better be plenty stong.
Well, how strong is plenty strong? Remember your design needs. The main attachment is used (worst case) *alone* for crash or off field landings. The secondary lap restraint is used in the *one* instance your main belt fails. In theory, the secondary point must be good for ~1.5G worth of load. I would think (way off the top of my head), you could drill a 3/16 hole down somewhere on the anchor assembly and install an AN-grade screw eye. Connect some 3/32" aircraft cable and route up to an attachment up above the floor board somewhere for the secondary restraint. Just one wild idea.

Last edited by Low Pass : 09-10-2013 at 10:07 AM.
Reply With Quote
  #12  
Old 09-10-2013, 09:29 AM
Daniel S. Daniel S. is offline
 
Join Date: Dec 2011
Location: Lawrenceville, Georgia
Posts: 315
Default

Thanks Larry!
Those were exactly the posts I was looking for!!! I remembered them but couldn't find them. I guess I'm a search dummy!
__________________
DANIEL S.
RV7-A (528KS)
-Empannage Done.
-Electrical System Planning / Schematic Done.
-Wing Kit Delivered 09/13/12.
-Wings 95% Done Flaps & Electrical to go.
-Have got to order the fuse soon!!!!.

[/font]http://www.mykitlog.com/dschoning/
"This is a first-time event, and we're looking forward to it"... Chuck Yeager
Reply With Quote
  #13  
Old 09-10-2013, 12:52 PM
Daniel S. Daniel S. is offline
 
Join Date: Dec 2011
Location: Lawrenceville, Georgia
Posts: 315
Default No Luck

I've gone through all of the old posts & have yet to find any *Sucessful* secondary anchor point mods. Maybe, I'm being naive to the floor design, but I dont see why you could add 4 secondary ribs with 1/8 inch stock doublers between them & bolt directly to the rib sandwich. I'd think that would be plenty strong to me snug at -2Gs (450lbs).

***Rib sandwich (my idea)= Stock rib & placement, then a 1/8inch doubler, then a secondary rib with opposite flange orientation... All this riveted together as one floor rib & riveted in place. AN4 bolt through the sandwich, trim flange where belt passes through floor, add second ratchet type lap belt The only draw back I can think of is added weight. Dumb mod idea?
__________________
DANIEL S.
RV7-A (528KS)
-Empannage Done.
-Electrical System Planning / Schematic Done.
-Wing Kit Delivered 09/13/12.
-Wings 95% Done Flaps & Electrical to go.
-Have got to order the fuse soon!!!!.

[/font]http://www.mykitlog.com/dschoning/
"This is a first-time event, and we're looking forward to it"... Chuck Yeager
Reply With Quote
  #14  
Old 09-10-2013, 01:28 PM
SuperCubDriver SuperCubDriver is offline
 
Join Date: Feb 2011
Location: Germany
Posts: 443
Default

I also wanted to have a second lap belt for the occasional aerobatics. I am not afraid that the belt itself is failing - more that it is not perfectly closed or I open it inadvertendly during flight with the control stick or however.
So what I did is using the same anchor points and installed some aluminum spacers. I bought a lap belt from Aircraft-Spruce with two removable ends. These are easily installed when needed and the belt can also be used as baggage tie-downs with another anchor point at the rear of the baggage compartment.


__________________
RV-7 flying, IO-375 w. P-Mags, 200RV Prop

RV-8 flying, IO-375, P-Mags, 74RV Prop
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 07:58 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.