[quoteAn upright armrest would be forced down rapidly by the violent deceleration forces of a crash. This could cause injury to any limb or part of the body caught in its path. ][/quote]
What a load of twaddle!
Any deceleration-force capable of doing that, would already have fxxed all the pax anyway.
I was once aquainted with a boat-rigger. he wore a "home-made" rope-belt with a large Phosphor-Bronze snap-shackle closure.....It looked very macho, this huge "gold" gleaming "buckle".....As a snotty nosed teenager, I queried why he wasn't using a Stainless-steel one,-lighter, stronger and less bulky.
He explained that, if he fell from a masthead, the rope would stretch, absorbing energy.......then the shackle would burst.....absorbing energy.....then he would continue deckward,hopefully at a surviveable velocity.
Were the shackle NOT to burst, his back would be broken or in an extreme case the portion of his body above the "belt" would descend independently from the lower half.
That man understood Energy-Management about 50 years ago!
Last edited by cockney steve; 28th Oct 2012 at 09:44.
Reason: speeling