[simpits-tech] G-Suit

[Marv De Beque]

Chris,

The information I have is for the Combat Edge system.  Since the speed 
jeans are the same, this may be applicable for non-CE equipment.

Max G-Suit Pressure = 11 psi @ 9G
G-Suit inflation starts @ 1.25 - 1.5 G

It is a linear function of G-Suit Pressure vs. G Force.  That is, the 
formula should yield a strait line for pressure on a graph as the G 
force builds from min to max.

The Combat Edge Mask and pressure Vest work in a similar way.  At 
minimum G (1.25 to 1.5G) additional pressure is added to the oxygen in 
the mask linearly until it reaches a maximum of 1.2 psi (above ambient) 
@ 9 G.

If you try to build a CE system be very careful about over pressure with 
the mask!  The 1.2 psi max is enough to require additional work to 
exhale.  The pressure vest and mask work together to balance the 
pressure force between what is in the mask (forced into your lungs) and 
what is in the vest (squeezing of your chest).  At the same time a 
bladder in your helmet will inflate and force the helmet back and the 
mask onto your face for a better seal.

The system should react very quickly.  I don't know the exact latency 
time requirements, but it should be measured in milliseconds, I presume.

The air pressure used for the G-Suit is generated by an on-board rotary 
compressor and regulated electronically.  The oxygen supply for the CE 
system is controlled by the O2 panel which is updated from the old F-16 
style that you see on eBay.

Obviously, there are safety systems as well, but I don't remember how 
they operate.

Marv

On Thursday, February 14, 2002, at 12:14 PM, c.vanlierop wrote:

> Hi,
>
> I'm at the moment brainstorming about how to implement a functional 
> G-Suit
> in my F16 cockpit (cheaply) so there's some stuff i need to know thet I
> don't yet know. I wonder if any of you can help me!?
>
> - What's the maximum volume of air that's blown into the G-Suit 
> (preferably
> in Litres, but i can convert if necessary ;-)
> - What's the maximum pressure (I have been told 1Psi but don't know how
> reliable that info is)
> - At what G-load does the G-Suit Kick in?
> - Is the pressure built up gradually with increasing G's or is it an 
> On/Off
> kind-a-thing?
> - How fast does the G-Suit kick in when pulling G's instantly (does it 
> build
> up 'slowly' or does it go rockhard in a millisecond)?
> - Does anyone know how it works in a real F16: do they use compressed 
> air
> from a 'reservoir', does it work with a pump/compressor or maybe a
> ballow/pisto kind of device?
> - Any other usefull info that I didn't come up with right now....
>
> Thanks in advance guys :-)
> Chris "SpeedOne" Van Lierop
>
>
>
>
>
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