[simpits-tech] G-Suit

[Marv De Beque]

Well, the total system volume isn't too important.  The reason is that 
when you deflate the system you aren't creating a vacuum and withdrawing 
all of the air.  Rather, you are simply equalizing the pressure between 
the ambient air pressure and that inside the suit.

Your biggest problem might be the charge time to get the suit inflated.  
This is where a reserve tank will help.  The tank can be pressurized to 
a higher pressure and act as a capacitor.  The compressor will turn on 
when tank pressure drops to a preset level.

The tank size will depend on how much pressure is maintained in the tank 
and how often you inflate the suit.  Larger is better.

Now, this gets down to how to regulate the output.  One thought is to 
use multiple regulators set at various pressures.  However, you would 
need a large number of these to get reasonable resolution so it doesn't 
feel like a doctors blood pressure cuff pumping up in steps.

A better method might be to use a pressure sensor and a switch to turn 
on and off as required.  Remember, you'll need a switch to bleed the 
system air, too.

Marv


On Friday, February 15, 2002, at 02:17 AM, c.vanlierop wrote:

> Hi,
>
>
>> I did not include volume on my first reply and the reason is that the
>> system does not rely on volume, but pressure.
>
>> As a builder, you need to be able to supply enough air to inflate the
>> suit to a desired pressure and to bleed that air off when the G force 
>> is
>> reduced.
>
> Thus I need to know the volume of air the compressor can 'move' in 
> order to
> fill the G-suit. Since I want to keep everything as compact as 
> possible I
> want to work as close to the minimum requirements as possible...
>
> ..or am I thinking i the wrong direction here?
>
> Chris "SpeedOne" Van Lierop
>
>
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