[simpits-tech] Cockpit builders quote....

[Scott]

I would love to check those figures, but I don't know where, I've pretty
much exhausted the internet for the pressure AFTER the regulator...  The
only thing I could come up with is the patent for the newest Air Combat Crew
Test Unit...   Believe you me, I thought those numbers were rediculous low,
but I have no other verification numbers...  I do know, with the scott air
packs, the positive pressure really isn't that positive, basically enough
that when you inhale and generate a neg pressure, the regulator opens...  (i
can ony assume that is how SCUBA works? never done that...)   I do not know
what that PSI is...

My plan was this...

Air compressor to TTU-529/E (the mil test kit) to mask and 12v variable
pressure soloniod to the CSU-13 g-suit...  (tied to the computer, I don't
know how yet, the devil is in the details...)

this mil test kit has all the necessary components to take an input from a
compressed air source and "power" both the mask and the testing of the
g-suit....  everything I needed to gut to fit into the consoles...

Prior to finding a working TTU-529, I was going to supply the system
directly... so I hunted for the regulated pressure, and that is all i could
find...  kinda a moot point now that I have the test kit...


BTW, back to the industrial air filter needed for breathing air, I do
remember that OSHA had a standard - "Grade D" for breathing air...   I did a
search for grade d filters and there are a ton, I just dont remember
shelling out that kinda money for the system we had at the paint shop...  I
need to bust into storage and see what goodies are still left...

More to come...

Scott

----- Original Message -----
From: "Joseph Fagner" <falcon4 at sbcglobal.net>
To: "'Simulator Cockpit tech list'" <simpits-tech at simpits.org>
Sent: Monday, March 26, 2007 11:46 AM
Subject: Re: [simpits-tech] Cockpit builders quote....


> IIRC, one atmosphere measured in a column of water is 14 psi, adding 5-10
> psi through a mask would hardly blow it off your face.  I can generate
5-10
> psi (probably more) just blowing up a balloon.
>
> If you think about the combat edge system, you'd need more than 1.2 psi
> generated in a high G situation to even be able to breath.  The breathing
> system of any jet will generate similar pressures (relatively speaking,
> probably not exactly similar but the mechanism is analogous) to that of a
> scuba system since you are dealing with having to expand the chest cavity
> against an opposing force...G's for the pilot, pressure for the diver.
>
> Finding the conversion for 1 atmosphere to in-H20 is 407.  So this manual
> says a pilot shouldn't breath at pressure above 16 in-H2o, yet I'm
breathing
> at 407 in-H2o right now??
>
> I'd double check those figures.
>
> Jay
>
> -----Original Message-----
> From: simpits-tech-bounces at simpits.org
> [mailto:simpits-tech-bounces at simpits.org] On Behalf Of Scott
> Sent: Sunday, March 25, 2007 11:27 PM
> To: Simulator Cockpit tech list
> Subject: Re: [simpits-tech] Cockpit builders quote....
>
>
> ----- Original Message -----
> From: "Joseph Fagner" <falcon4 at sbcglobal.net>
> To: "'Simulator Cockpit tech list'" <simpits-tech at simpits.org>
> Sent: Saturday, March 24, 2007 4:32 AM
> Subject: Re: [simpits-tech] Cockpit builders quote....
>
>
> > I would be sure that it's really properly filtered as there is a bunch
of
> > stuff in that air that would not be nice to your lungs.  Being a scuba
> > diver, I decided using a scuba tank and a low pressure port from the
> primary
> > reg will be the way to go for me.  Low pressure primaries are around 150
> > psi.  You can regulate that down to a nice 5-10 psi for the O2 mask.
>
>
> 5-10psi??   I have the current patent paperwork for the newest mask/g-suit
> test kit...
> Built to test the MBU-12/20 mask...  this is pulled directly from the
> patent:
>
> "...When the g-suit is not inflated, it is dangerous to breathe air at
> pressures much above 16in/H2O."
>
> Using a IN/H2O to PSI Conversion chart it is 0.5774psi.  5-10psi would
blow
> the mask off your face, or worse...
>
> Continuing from the patent:
>
> "When performing COMBAT EDGE testing, it is necessary to expose the user
to
> excessive breathing pressures.
> Exposure to excessive breathing pressure can hurt the user.  It is only
safe
> under curtain conditions and
> for limited periods of exposure.  Under no circumstances should the
> breathing air pressure exceed 34 IN/H2O."
>
> Converting 34 IN/H2O = 1.227psi...  (FYI - Combat Edge is the new positive
> pressure system)
>
> I currently do not have much other than CAD drawings of my cockpit done, I
> have however put extensive time
> picking up oddball parts (like my TTU-529/E test kit) in the hopes of
> pulling out the parts to connect and use
> the MBU-12 and CSU-13 g-suit with...  I couldn't find ANY literature for a
> long time on the pressures being supplied
> to the MBU-12, until I located this patent...   if anyone out that has
> anything else or corrections, please send them!
>
> I know we used a DeVilbiss dryer on the line in the shop.  What was after
> that i cannot say for certain, the co-owner
> still has the filters, and when I see her tomorrow I will get exact part
> numbers for you...  it wasn't that expensive, and
> with a new compressor dedicated to breathing air, and clean dry air for
the
> spray guns, we were up to code...
>
> More to follow!  -- Scott
>
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