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  #1  
Old 06-23-2021, 10:48 AM
jacknife jacknife is offline
 
Join Date: Dec 2007
Location: Tsawwassen B.C. Canada
Posts: 16
Default Shoulder Harness

Here's what I've done to try and come close to the AC 43 recommendations on shoulder harnesses. I don't like the individual shoulder loops on the bar and folks have reported one shoulder slipping out on asymmetrical decelerations.
Not particularly elegant but satisfies the "webbing guide positions dual shoulder belts in the middle of the occupants shoulders".

Ralph
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  #2  
Old 06-23-2021, 01:53 PM
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Low Pass Low Pass is offline
 
Join Date: May 2006
Location: Houston
Posts: 2,120
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I personally wouldn't care for the rubbing on my neck from the centrally mounted strap. But that's me. Also, I don't find the separate shoulder attachment to be an issue in flight when the straps are tight/semi tight. But they do fall off when loosened on the ground. In the past, I've used a lanyard with a plastic clip to keep the shoulder straps from falling down. Using nothing now with my latest set of harnesses.

Noting your device for keeping the belts centered, I use a tie wrap though a piece of 1/4" silicone tubing. Minimal, light, works well.

2 cents
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Last edited by Low Pass : 06-23-2021 at 01:58 PM.
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  #3  
Old 06-23-2021, 03:02 PM
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rv8ch rv8ch is offline
 
Join Date: Feb 2005
Location: LSGY
Posts: 4,152
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Quote:
Originally Posted by jacknife View Post
Here's what I've done to try and come close to the AC 43 recommendations on shoulder harnesses. ...
Thanks for bringing this up - I have to confess I didn't read this section of the AC 43.13 very closely. It looks like the standard RV-8 design is ok based on this diagram. Perhaps I'm misreading this?

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  #4  
Old 06-24-2021, 05:57 AM
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Saville Saville is offline
 
Join Date: May 2014
Location: KBVY Massachusetts
Posts: 1,257
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I always wear a collared shirt when flying so that I can raise the collar and protect my neck from the strap edges.

I use a cable tie to keep the two straps together on the bar but the assembly can still slide along the bar. I have to remember to center it before laying the straps off to the side when getting in.

I've had thoughts of some sort of retention mechanism to keep the straps centered but it's a low priority item.
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  #5  
Old 06-25-2021, 12:47 PM
jacknife jacknife is offline
 
Join Date: Dec 2007
Location: Tsawwassen B.C. Canada
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I brought this forward because it's part of my survival strategy flying where I do. My Lycoming engine is the best that money can buy but if it fails I'm into some rough terrain or the drink. With the excellent RV8 crash cage and a strong well anchored restraint system capable of up to 9g if I hit the deck at 50mph I will stop in 10 feet. If I hit at 100mph I'm still stopped in under 40 feet at the full 9g. The straps Van's sells are light weight and very strong (2500 lb break strength) and because I don't do a lot of aero they are all I need. As an aside if you do do a lot of aerobatics I would image you would double up on the safety harnesses like the pros.

I have learned Soooo much on this great aviator's website I'm just hoping to give back a little.

Ralph
RV8 C-FGWW
CZBB
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