[MR] Heavy Helms and inertia

[jfearon at mindspring.com]

Just wanted to add one comment about the padding. almost all injuries I've
seen from a helmet have been from improper  padding and not the weight of
the helm, make sure that you use closed cell foam as your first layer of
foam against the metal so that your head does not bootom on the metal as it
will with open cell foam generally the thicker the closed cell foam the
better the shock absorption also the helm should fit snugly onto your head
and not rock or spin from a blow and finally make sure any sharp welds are
sanded off and that you do not leave any areas of the helm uncovered with
padding where the metal of the helm can bottom out on your head, this is
usually a problem in the forehead area.
Just my thoughts
Sir Jason
----- Original Message -----
From: "War College" <warcollege at hotmail.com>
To: <atlantia at atlantia.sca.org>
Sent: Thursday, September 27, 2001 6:59 PM
Subject: [MR] Heavy Helms and inertia


> Going back to simple Physics <I'm a simple person>, the equation F=MA
comes
> into mind.  Force = Mass times Velocity.
>
> The heavier the helm, the more force it takes to move it.  If you put two
> croquet balls close together but not quite touching and stike one, the
other
> goes flying off according to how hard you hit it.  If you put a bowling
ball
> close but not quite touching a croquet ball and hit the bowling ball with
> the same force as before, the croquet ball is not going nearly as far.
>
> A helm should be padded, which means the metal of the helm is close but
not
> quite touching your head. A heavy helm will take more energy to move than
a
> lighter one.  Then again, I could be misunderstanding F=MA. :-)  Hope this
> helps.
>
> Misha
>
> >Message: 6
> >Reply-To: <phillip at mindless.com>
> >From: "Phillip Jones" <phillip at mindless.com>
> >To: "Merry Rose" <atlantia at atlantia.sca.org>
> >Date: Tue, 25 Sep 2001 21:13:07 -0400
> >Subject: [MR] Heavy Helms and inertia
> >
> >I've heard rumors about why we like heavy helmets, but have seen no data
to
> >back it up. Is there any scientific evidence that a heavy helm protects
> >better than a light one?
> >
> >
> >Phillip Jones
> >Triplette Competition Arms
> >101 East Main Street
> >Elkin, NC 28621
> >336-835-7774
> >phillip at mindless.com
> >www.triplette.com
>
>
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