Fred,
Nice execution of a good idea.
CSA-VLA provides little guidance:
http://www.easa.eu.int/doc/Agency_Mesures/Certification_Spec/decision_ED_2003_18_RM.pdf
See pdf page 100 (or pages 2-8 and 2-9 at the back.
It merely advises for "..adequate separation of ...straps to minimise...
chafing of wearer's neck...." but recommends a maximum separation of 8" and
maximum included angle of 60 degrees.
Was your load testing applied to the straps as fitted to the device in the
aircraft or merely to the device sat on a strong surface? And would it be
better to wrap the forward edge of the device around the front edge of the
headrest, to reduce the eccentricity of loading on that corner? thereby
maximising the resistant of the front face of the headrest
Would prefer to see the guides at the top made as part of (or recessed in
to) the moulding, with broad rounded edges.
Duncan McF.
----- Original Message -----
From: "Fred Klein" <fklein@orcasonline.com>
Sent: Monday, December 03, 2007 11:38 PM
Subject: Re: Europa-List: Shoulder harness restraint
>
>
>> Do you see a risk in the harnesses cutting into each side of your neck
>> when under significant tension, since the two harness parts are
>> restrained in the center just behind the neck?
>> Svein
>> LN-SKJ
>
> Svein,
>
> Not really...if you consider the rear attach point where the 2 shoulder
> straps begin and the points where they attach to the seat belt in front,
> you will trace straight lines which diverge from one's neck rather than
> "scissoring" it under tension.
>
> Thanks for your comment,
>
> Fred
>
>
> --
> This message has been scanned for viruses and
> dangerous content by MailScanner, and is
> believed to be clean.
>
>
>
|