[simpits-tech] Gsuit-Aircompressor-F4
Craig Rochester
simpits-tech@simpits.org
Sun, 15 Jun 2003 08:08:52 -0400
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Hi Albert,
Cautionary note: working with compressed air is inherently dangerous, as there's a lot of stored energy.
I bought the regulators and servos on eBay for about $45US. There's another $15 in miscellaneous materials.
You'd need a lathe to make the piston for the "quick exhaust valve(QEV)". The servo controller I'm using
costs $54US and is a "no-brainer" to use with the program written by the guy in Norway.
I use a nail gun compressor @ 100 psi supply pressure. I've tested down to 40 psi. You need the compressor
at a higher pressure to ensure fast response. One of the Norway guys is using an old refrigerator compressor.
He says it is very quiet and has the required capacity. If it were me, I'd go for the free compressor and run
a long air hose to the computer.
I've been struggling with the QEV design. I've made a couple and they're being tested. When the design is
proven reliable, I'll post construction details. I don't intend to make the rigs for sale.
Craig
-----Original Message-----
From: simpits-tech-admin@simpits.org [mailto:simpits-tech-admin@simpits.org]On Behalf Of Albert
Sent: Sunday, June 15, 2003 4:16 AM
To: simpits-tech@simpits.org
Subject: Re: [simpits-tech] Gsuit-Aircompressor-F4
G'day Craig,
Good to hear from you. The concept of the servo pushes down on the diaphragm of a pressure regulator make
sense to me. How it is constructed is something I am not too sure at this stage. However, I am researching and
evaluating whether its a thing to do to my own project. After reading on the simpit forum link. I wonder how
much will a normal regular/ exhaust valve be worth? Like yourself, I have never work with a servo previously,
but I am slowly coming to terms with what it does :) Judging from the amount of PSI required to inflat the
Gsuit... will something like a small compressor typical for airbrushing be good for the purpose?
A mate was going to give me a 50PSI air compressor (for nail gun) but when I told him the most I will need
from a compressor is only about 10 PSI. He asked me what on earth am I doing with it? YOu should have seen the
guy trying hard to understand what on earth I am trying to do :) Judging by your experience, it sounds like it
really only need 4psi to do the job. So I thought something small will hopefully be cheaper and also quieter
compared to a larger louder compressor.
Similar to the problem of trying to cool down my cockpit previously with an active cooling system. (At the
moment, the canopy is not on the pit yet. I use a normal household rotary fan blowing air in from the location
of the rudders) Space and noise will be an issue I have to take into consideration. Did I mention budget as
well :)
Thanks for sharing your insight with us Craig.
Cheers,
Al
Sydney, Oz
----- Original Message -----
From: Craig Rochester
To: simpits-tech@simpits.org
Sent: Sunday, June 15, 2003 3:12 PM
Subject: RE: [simpits-tech] Gsuit-Aircompressor-F4
Hi Al,
I've been working with a couple of guys in Norway on this(I'm in US). We use the "shared file" in Falcon4
to get the G data. One of the other guys wrote a small program that runs in the background with Falcon. The
program takes the G data and drives a servo. The servo pushes down on the diaphragm of a pressure regulator
that controls the pressure to the suit.
The max pressure in high G maneuvers(real jet) is about 10 psi. The military uses this in simulators at
about 5 psi max. I use mine at 4 psi max as 5 psi is starting to hurt.
I use mine more as a motion cue device than a simulation of the G-suit function. I've added a component
to increase the speed and sensitivity of the exhaust part of the regulator. By having immediate response,
changes in G feel like real motion(inertial forces).
I locate my compressor 50' away in another room. The rig makes a fair amount of hissing a farting; I wrap
a towel around it and reduce most of the noise.
There's info here:
http://www.simpits.org/forums/viewtopic.php?topic=55&forum=1&28
http://forums.frugalsworld.com/vbb/showthread.php?s=&threadid=20800
Craig R.
-----Original Message-----
From: simpits-tech-admin@simpits.org [mailto:simpits-tech-admin@simpits.org]On Behalf Of Albert
Sent: Saturday, June 14, 2003 7:30 PM
To: simpits-tech@simpits.org
Subject: [simpits-tech] Gsuit-Aircompressor-F4
I think someone has already been using a air compressor controlled by a computer to inflat a Gsuit for
their flight simulator?
My Gsuit is coming in on Wednesday (Thanks to Sukit from Thailand) and I was wondering how the setup is.
What kind of computer, software and compressor are used and if it can be used in conjunction with falcon 4?
My other concerns are the noise factor from the compressor...as well as the pain factor :)
Thanks in advance,
Al
Sydney, Oz
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<DIV><SPAN class=3D218421611-15062003><FONT face=3DArial color=3D#0000ff =
size=3D2>Hi=20
Albert,</FONT></SPAN></DIV>
<DIV><SPAN class=3D218421611-15062003><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D218421611-15062003><FONT face=3DArial color=3D#0000ff =
size=3D2><STRONG><U>Cautionary note: </U></STRONG>working with =
compressed air is=20
inherently dangerous, as there's a lot of stored =
energy.</FONT></SPAN></DIV>
<DIV><SPAN class=3D218421611-15062003><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D218421611-15062003><FONT face=3DArial color=3D#0000ff =
size=3D2>I=20
bought the regulators and servos on eBay for about =
$45US.</FONT></SPAN><FONT=20
face=3D"Times New Roman"><FONT size=3D2><SPAN =
class=3D218421611-15062003><FONT=20
face=3DArial color=3D#0000ff> There's another $15 in miscellaneous =
materials. You'd need a lathe to make the piston for the "quick =
exhaust=20
valve(QEV)". The servo controller I'm using costs $54US and is a=20
"no-brainer" to use with the program written by the guy in=20
Norway.</FONT></SPAN></FONT></FONT></DIV>
<DIV><FONT face=3D"Times New Roman"><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
class=3D218421611-15062003></SPAN></FONT></FONT> </DIV>
<DIV><FONT face=3D"Times New Roman"><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
class=3D218421611-15062003>I use a nail gun compressor @ 100 psi supply=20
pressure. I've tested down to 40 psi. You need the =
compressor at a=20
higher pressure to ensure fast response. One of the Norway guys is =
using=20
an old refrigerator compressor. He says it is very quiet and has =
the=20
required capacity. If it were me, I'd go for the free compressor =
and run a=20
long air hose to the computer.</SPAN></FONT></FONT></DIV>
<DIV><FONT face=3D"Times New Roman"><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
class=3D218421611-15062003></SPAN></FONT></FONT> </DIV>
<DIV><FONT face=3D"Times New Roman"><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
class=3D218421611-15062003>I've been struggling with the QEV =
design. I've=20
made a couple and they're being tested. When the design is proven=20
reliable, I'll post construction details. I don't intend to make =
the=20
rigs for sale.</SPAN></FONT></FONT></DIV>
<DIV><FONT face=3D"Times New Roman"><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
class=3D218421611-15062003></SPAN></FONT></FONT> </DIV>
<DIV><FONT face=3D"Times New Roman"><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
class=3D218421611-15062003>Craig</SPAN></FONT></FONT></DIV>
<DIV><FONT face=3D"Times New Roman"><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
class=3D218421611-15062003></SPAN></FONT></FONT> </DIV>
<DIV><FONT face=3D"Times New Roman"><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
class=3D218421611-15062003></SPAN></FONT></FONT> </DIV>
<DIV><FONT face=3D"Times New Roman"><FONT size=3D2><SPAN=20
class=3D218421611-15062003></SPAN></FONT></FONT> </DIV>
<DIV><FONT face=3D"Times New Roman"><FONT size=3D2><SPAN=20
class=3D218421611-15062003> </SPAN>-----Original =
Message-----<BR><B>From:</B>=20
simpits-tech-admin@simpits.org =
[mailto:simpits-tech-admin@simpits.org]<B>On=20
Behalf Of</B> Albert<BR><B>Sent:</B> Sunday, June 15, 2003 4:16 =
AM<BR><B>To:</B>=20
simpits-tech@simpits.org<BR><B>Subject:</B> Re: [simpits-tech]=20
Gsuit-Aircompressor-F4<BR><BR></DIV></FONT></FONT>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
<DIV><FONT face=3DArial size=3D2>G'day Craig,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Good to hear from you. The concept of =
the servo=20
pushes down on the diaphragm of a pressure regulator make sense to me. =
How it=20
is constructed is something I am not too sure at this stage. =
However, I=20
am researching and evaluating whether its a thing to do to =
my own=20
project. After reading on the simpit forum link. I wonder =
how much=20
will a normal regular/ exhaust valve be worth? Like =
yourself, I have=20
never work with a servo previously, but I am slowly coming to terms =
with what=20
it does :) Judging from the amount of PSI required to inflat the =
Gsuit... will=20
something like a small compressor typical for airbrushing be good for =
the=20
purpose? </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>A mate was going to give me a 50PSI =
air=20
compressor (for nail gun) but when I told him the most I will =
need from a=20
compressor is only about 10 PSI. He asked me what on earth am I doing =
with it?=20
YOu should have seen the guy trying hard to understand what on =
earth I am=20
trying to do :) Judging by your experience, it sounds like it =
really only=20
need 4psi to do the job. So I thought something small will hopefully =
be=20
cheaper and also quieter compared to a larger louder compressor. =
</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Similar to the problem of trying to =
cool down my=20
cockpit previously with an active cooling system. (At the =
moment,=20
the canopy is not on the pit yet. I use a normal household rotary fan =
blowing=20
air in from the location of the rudders) Space and noise will be an =
issue I=20
have to take into consideration. Did I mention budget as well :) =
</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Thanks for sharing your insight with =
us=20
Craig.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Cheers,</FONT></DIV><FONT =
face=3DArial size=3D2>
<DIV><BR>Al</DIV>
<DIV>Sydney, Oz</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt =B7s=B2=D3=A9=FA=C5=E9">----- Original =
Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt =B7s=B2=D3=A9=FA=C5=E9; =
font-color: black"><B>From:</B>=20
<A title=3Djohncraigroch@msn.com =
href=3D"mailto:johncraigroch@msn.com">Craig=20
Rochester</A> </DIV>
<DIV style=3D"FONT: 10pt =B7s=B2=D3=A9=FA=C5=E9"><B>To:</B> <A =
title=3Dsimpits-tech@simpits.org=20
=
href=3D"mailto:simpits-tech@simpits.org">simpits-tech@simpits.org</A> =
</DIV>
<DIV style=3D"FONT: 10pt =B7s=B2=D3=A9=FA=C5=E9"><B>Sent:</B> =
Sunday, June 15, 2003 3:12=20
PM</DIV>
<DIV style=3D"FONT: 10pt =B7s=B2=D3=A9=FA=C5=E9"><B>Subject:</B> RE: =
[simpits-tech]=20
Gsuit-Aircompressor-F4</DIV>
<DIV><FONT face=3DArial size=3D2></FONT><BR></DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff size=3D2>Hi=20
Al,</FONT></SPAN></DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>I've been working with a couple of guys in Norway on =
this(I'm in=20
US). We use the "shared file" in Falcon4 to get the G =
data. One=20
of the other guys wrote a small program that runs in the background =
with=20
Falcon. The program takes the G data and drives a servo. =
The=20
servo pushes down on the diaphragm of a pressure regulator that =
controls the=20
pressure to the suit.</FONT></SPAN></DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>The max pressure in high G maneuvers(real jet) is =
about 10=20
psi. The military uses this in simulators at about 5 psi =
max. I=20
use mine at 4 psi max as 5 psi is starting to =
hurt.</FONT></SPAN></DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff size=3D2>I=20
use mine more as a motion cue device than a simulation of the G-suit =
function. I've added a component to increase the speed and =
sensitivity=20
of the exhaust part of the regulator. By having immediate =
response,=20
changes in G feel like real motion(inertial =
forces).</FONT></SPAN></DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff size=3D2>I=20
locate my compressor 50' away in another room. The rig makes a =
fair=20
amount of hissing a farting; I wrap a towel around it and reduce =
most of the=20
noise.</FONT></SPAN></DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>There's info here:</FONT></SPAN></DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff size=3D2><A=20
=
href=3D"http://www.simpits.org/forums/viewtopic.php?topic=3D55&forum=3D=
1&28">http://www.simpits.org/forums/viewtopic.php?topic=3D55&foru=
m=3D1&28</A></FONT></SPAN></DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff size=3D2><A=20
=
href=3D"http://forums.frugalsworld.com/vbb/showthread.php?s=3D&thread=
id=3D20800">http://forums.frugalsworld.com/vbb/showthread.php?s=3D&th=
readid=3D20800</A></FONT></SPAN></DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D921075104-15062003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>Craig R.</FONT></SPAN></DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
<DIV class=3DOutlookMessageHeader><FONT face=3D"Times New Roman"=20
size=3D2>-----Original Message-----<BR><B>From:</B>=20
simpits-tech-admin@simpits.org=20
[mailto:simpits-tech-admin@simpits.org]<B>On Behalf Of</B>=20
Albert<BR><B>Sent:</B> Saturday, June 14, 2003 7:30 =
PM<BR><B>To:</B>=20
simpits-tech@simpits.org<BR><B>Subject:</B> [simpits-tech]=20
Gsuit-Aircompressor-F4<BR><BR></FONT></DIV>
<DIV><FONT face=3DArial size=3D2>I think =
someone has already been=20
using a air compressor controlled by a computer to inflat a Gsuit =
for=20
their flight simulator?</FONT></DIV><FONT face=3DArial size=3D2>
<DIV><BR>My Gsuit is coming in on Wednesday (Thanks to Sukit from=20
Thailand) and I was wondering how the setup is. What kind of =
computer,=20
software and compressor are used and if it can be used in =
conjunction with=20
falcon 4? </DIV>
<DIV> </DIV>
<DIV>My other concerns are the noise factor from the =
compressor...as=20
well as the pain factor :)</DIV>
<DIV> </DIV>
<DIV>Thanks in advance,</DIV>
<DIV> </DIV>
<DIV>Al</DIV>
<DIV>Sydney,=20
Oz</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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