[Land-speed] Head Restraints...another concept.

[joseph lance]

This is an interesting subject. I don't have any direct LSR experience to 
contribute but it reminds me that NFL football players experience 
instantaneous impacts of 75 g or so.

Wonder what g-forces Bronko Nagurski experienced when he decked a horse or 
ran head first into that wall and cracked some bricks.

Lance

----- Original Message ----- 
From: "Ed Weldon" <23.weldon at comcast.net>
To: <drmayf at mayfco.com>; "LSR" <land-speed at autox.team.net>
Sent: Wednesday, September 10, 2008 12:06 AM
Subject: Re: [Land-speed] Head Restraints...another concept.


> Mayf-- I like your line of thinking.  Pick components from the mass
> production automotive technology we already have today.  The idea that the
> device should only be active under actual crash conditions and then
> automatically revert to passive or at least non-interfering afterward 
> makes
> a lot of sense for us as it did to automotive engineers many years ago 
> when
> they first started looking beyond simple seatbelts to improve vehicle
> safety.
> Do we really understand what forces, moments, impulses and accelerations 
> the
> head, neck and upper torso can tolerate?  That's probably the place to
> start.  There are beginnings of that in some of the device manufacturer's
> websites.
> This all sort of makes me wish I could be back in the working world with a
> budget to spend on R&D in this direction.
> Ed