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Hi, here is the physicist giving a physics lesson again!
What is "lifting the bag is the weight of the water that you are displacing.
Remember this guy called Archimede?????
The difference in weight of the inflating gas is insignificant compared to
that of even just a few cc's of water.
You will have to hold just as much since you'll be displacing the same
amount of water and it will not get to the surface quicker. Using helium
will not make the slightest difference in deployment time.
I'm far from being a "pro" diver but, when I see something that is basic
physics, that I thought was part of every basic scuba course, so badly
understood, I can not but jump on it.
Cheers
On Mon, 22 Jul 1996, Jody Everett wrote:
> Try using Helium for inflation. It is a lighter gas so you won't have to
> hold back as much and it should also get to the surface quicker. Since it
> will get to the surface quicker you can hit the golf course a little earlier.
>
> Regards,
> Jody
>
> At 01:02 PM 7/22/96 -0400, Grant Wilkinson wrote:
> >Some time ago,there was a great thread on this list (I think) about
> >drifting deco stops using lift bags, and how best to rig the reel. A Brit
> >on the list told of using webbing because it doesn't tangle, and I am
> >taking his idea to heart.
> >
> >My question is, how to do you get enough inflation in the bad. We
> >frequently don't have anything solid to temporarily tie the bad to while
> >inflating it, so after a few shots of air, it is impossible to hold down.
> >I have heard of using CO2 inflators. I would appreciate any advice from
> >those who do this.
> >
> >--
> >
> >Grant Wilkinson
> >Ottawa, Canada
> >grantw@fr*.ca*.ca*
> >--
> >Send mail for the `techdiver' mailing list to `techdiver@terra.net'.
> >Send subscription/archive requests to `techdiver-request@terra.net'.
> >
> >
>
> --
> Send mail for the `techdiver' mailing list to `techdiver@terra.net'.
> Send subscription/archive requests to `techdiver-request@terra.net'.
>
[\]
|
=================================================================^^(_)^^^^^^^^^
Roger Lacasse "I found the meaning of life!
Foster Radiation Laboratory, It's in the eyes of my wife and kids."
McGill University, Office: (514) 398-7025
3559 University street, Fax: (514) 398-7022
Montreal, Qc., Canada. e-mail: roger@ph*.mc*.ca*
H3A 2B1 http://spiff.physics.mcgill.ca/scuba.html
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