Two tiny shock absorbers attach to the sides of the helmet. Rollers at the
bottom end go under the shoulder strap of the harness. It is designed to be
part of the harness system, not (as in virtually all the other devices) part
of the driver. Quick-release pins detach it from the helmet. The Isaac
website (http://www.isaacdirect.com/) has a 4-second film clip that shows
the ease with which it detaches.
There is not single strap involved (other than the car's harness system).
Even HANS has straps, albeit a minimal part of that system costing maybe $25
to replace instead of needing to replace the whole system as with most of
the others.
--Rocky
----- Original Message -----
From: "Teresa L Robinson" <oogbarracuda@juno.com>
To: <rocky@tri.net>
Cc: <fot@autox.team.net>
Sent: Friday, February 20, 2004 7:20 PM
Subject: Re: sports car
> What is the "Issac" device you're talking about? I'm familiar with
> HANS,Hutchens,Simpson and GForce systems,but "Issac" is a new one to me.
> Thanks.
> Mark Robinson
> RMVR Spitfire #272
>
> On Fri, 20 Feb 2004 01:42:08 -0600 "Rocky Entriken" <rocky@tri.net>
> writes:
> > > Rocky, just finished your article in Sports car. Were you able to
> > get a
> > > first hand look at the devices?
> >
> > No, I did not get my hands on the devices. As this article's point
> > was to
> > describe what was out there (using the SCCA Pro list as a reference
> > base)
> > but not to indicate any recommendation of any system, what you saw
> > was the
> > result of more-than-superficial Internet research (more than 100
> > pages of
> > printout) plus a couple of quickie interviews for items that left
> > questions
> > in my mind, plus a slightly longer interview with Dr. Melvin.
> >
> > Basically, I did the hours of web surfing for you (the generic
> > "you") that
> > you'd have to do to get an idea of what all was out there, then
> > summarized
> > it. (I love the Internet for my work -- 15 years ago this story
> > would have
> > taken two weeks to put together instead of two days).
> >
> > That said, my personal impression seems to mirror yours. I don't
> > like all
> > those strap dealies, and the Isaac seems a lot less cumbersome than
> > the
> > HANS. Melvin really did not like that the Isaac attached the helmet
> > to the
> > shoulder strap - something else to disconnect beside the belt buckle
> > -- but
> > since a lot of drivers nowadays also have to disconnect radio,
> > drinking
> > straw, forced-air inlets, coolsuit/coolhead, etc. etc. a couple of
> > quick
> > release pins beside your head are a little thing it seems. Actually,
> > since
> > you will release it every time you exit the car it the routine will
> > quickly
> > become habit. Also, the Isaac is the only system that needs no
> > replacing of
> > anything (assuming, like the helmet, you don't "use" it) while
> > everything
> > else, at least in part and for many of them in whole, need replacing
> > every
> > other year. In that, Dr. Melvin's point was well taken -- if you
> > plan to
> > race for any length of time, the HANS (or, IMHO, the Isaac) is
> > cheaper in
> > the long term.
> >
> > My plan now -- my helmet is a Snell 95, so I will likely need a new
> > one next
> > year. I'll get an Isaac then and attach the helmet anchors before I
> > paint it
> > (the anchors may change the design), which also means not having to
> > un-paint
> > the current helmet where the anchors go.
> >
> > About the only practical way to test drive the things, it seems,
> > would be to
> > borrow someone else's system *and* helmet for a session. Or maybe
> > even just
> > a few autocross runs with the system on would do it, so you could
> > concentrate on the system and not also be trying to qualify or
> > something.
> >
> > --Rocky
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