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Subject: Re: OMS wings
To: ststev@un*.co*
Date: Thu, 9 Jul 1998 08:50:19 -0400 (EDT)
Cc: techdiver@aquanaut.com
From: zimmmt@au*.al*.co* (Mike Zimmerman)
> They assume an improper position.  In the water, a traditional wing 
> when inflated will press itself 
> upward, wrapping around the divers tanks and, in fact, act to 
> continuously maintain a thin profile.  
> The retainer cords on the OMS wing keep the bladder 
> constricted (round in cross-section) and 
> present a greater forward profile and more drag.

Not to try to claim bondage wings are GOOD, but on this point
I think there may be some (valid) alternate views.

Ok, so bondage would keep wings close to body, even when inflated,
more along the plane of the body, and you claim present a larger 
forward swimming profile, equalling more resistance....

Other wings will wrap up around the tank, providing (as you
claim) less of a forward swimming profile.

first I must say I am not convinced about the profile.
As long as the air is disrtibuted within the wings, and
doesn't tend to collect at the top (defined as closer to
the diver's head) in one style more than the other I can't
see how wrapping around a tank accomplishes the magic trick
of providing the same bouyancy in less space.

Second, it would seem to me that as your wings wrap around your tank
it moves the bouyancy moment (I use the term loosely) farther
away from your own center... ie it would seem to me that the
circumference of the diver as a resistive force in the way has now
increased.  Just as you want your weights close to your body
I would think you'd want your bouyancy close to your body.  
We wouldn't put weights on the back of our tanks as they
tend to want to flip us over... if we put bouyancy closer to
the back of our tanks, it seems like that makes it harder
to flip over when we want to, or to even turn sideways when
going thru a restriction.

Again, leave out the other arguments about bondage wings, 
if you want to disagree, just lets discuss this one point?

Thanks,
Mike

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