[simpits-tech] Gsuit-Aircompressor-F4
Marv De Beque
simpits-tech@simpits.org
Sun, 15 Jun 2003 08:32:35 -0400
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Craig,
Have you considered a ball valve for the exhaust port?
On 6/15/03 8:08 AM, "Craig Rochester" <johncraigroch@msn.com> wrote:
> 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 <mailto:johncraigroch@msn.com>
>> 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://www.simpits.org/forums/viewtopic.php?topic=55&forum=1&28>
>> http://forums.frugalsworld.com/vbb/showthread.php?s=&threadid=20800
>> <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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<TITLE>Re: [simpits-tech] Gsuit-Aircompressor-F4</TITLE>
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<FONT FACE=3D"Verdana">Craig,<BR>
<BR>
Have you considered a ball valve for the exhaust port?<BR>
<BR>
<BR>
On 6/15/03 8:08 AM, "Craig Rochester" <johncraigroch@msn.com&g=
t; wrote:<BR>
<BR>
</FONT><BLOCKQUOTE><FONT COLOR=3D"#0000FF"><FONT SIZE=3D"2"><FONT FACE=3D"Arial">=
Hi Albert,<BR>
</FONT></FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT COLOR=3D"#0000FF"><FONT SIZE=3D"2"><FONT FACE=3D"Arial"><B><U>Cautio=
nary note: </U></B>working with compressed air is inherently dangerous, as t=
here's a lot of stored energy.<BR>
</FONT></FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT COLOR=3D"#0000FF"><FONT SIZE=3D"2"><FONT FACE=3D"Arial">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 th=
e "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.<BR>
</FONT></FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT COLOR=3D"#0000FF"><FONT SIZE=3D"2"><FONT FACE=3D"Arial">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.<BR=
>
</FONT></FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT COLOR=3D"#0000FF"><FONT SIZE=3D"2"><FONT FACE=3D"Arial">I've been st=
ruggling with the QEV design. I've made a couple and they're being tes=
ted. When the design is proven reliable, I'll post construction detail=
s. I don't intend to make the rigs for sale.<BR>
</FONT></FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT COLOR=3D"#0000FF"><FONT SIZE=3D"2"><FONT FACE=3D"Arial">Craig<BR>
</FONT></FONT></FONT><FONT FACE=3D"Verdana"> <BR>
<BR>
<BR>
</FONT><FONT SIZE=3D"2"><FONT FACE=3D"Times New Roman"> -----Original Message--=
---<BR>
<B>From:</B> simpits-tech-admin@simpits.org [mailto:simpits-tech-admin@simp=
its.org]<B>On Behalf Of</B> Albert<BR>
<B>Sent:</B> Sunday, June 15, 2003 4:16 AM<BR>
<B>To:</B> simpits-tech@simpits.org<BR>
<B>Subject:</B> Re: [simpits-tech] Gsuit-Aircompressor-F4<BR>
<BR>
</FONT></FONT><BLOCKQUOTE><FONT SIZE=3D"2"><FONT FACE=3D"Arial">G'day Craig,<BR=
>
</FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT SIZE=3D"2"><FONT FACE=3D"Arial">Good to hear from you. The concept=
of the servo pushes down on the diaphragm of a pressure regulator make sens=
e 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 ow=
n 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 wit=
h a servo previously, but I am slowly coming to terms with what it does :) J=
udging from the amount of PSI required to inflat the Gsuit... will something=
like a small compressor typical for airbrushing be good for the purpose? <B=
R>
</FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT SIZE=3D"2"><FONT FACE=3D"Arial">A mate was going to give me a 50PS=
I air compressor (for nail gun) but when I told him the most I will need fro=
m a compressor is only about 10 PSI. He asked me what on earth am I doing wi=
th 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 on=
ly need 4psi to do the job. So I thought something small will hopefully be c=
heaper and also quieter compared to a larger louder compressor. <BR>
</FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT SIZE=3D"2"><FONT FACE=3D"Arial">Similar to the problem of trying t=
o cool down my cockpit previously with an active cooling system. (At the mom=
ent, the canopy is not on the pit yet. I use a normal household rotary fan b=
lowing air in from the location of the rudders) Space and noise will be an i=
ssue I have to take into consideration. Did I mention budget as well :) <BR>
</FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT SIZE=3D"2"><FONT FACE=3D"Arial">Thanks for sharing your insight wi=
th us Craig.<BR>
</FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT SIZE=3D"2"><FONT FACE=3D"Arial">Cheers,<BR>
<BR>
Al<BR>
Sydney, Oz<BR>
</FONT></FONT><FONT FACE=3D"Verdana">----- Original Message ----- <BR>
<B>From:</B> Craig Rochester <mailto:johncraigroch@msn.com> <BR=
>
<B>To:</B> simpits-tech@simpits.org <BR>
<B>Sent:</B> Sunday, June 15, 2003 3:12 PM<BR>
<B>Subject:</B> RE: [simpits-tech] Gsuit-Aircompressor-F4<BR>
<BR>
</FONT><FONT COLOR=3D"#0000FF"><FONT SIZE=3D"2"><FONT FACE=3D"Arial">Hi Al,<BR>
</FONT></FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT COLOR=3D"#0000FF"><FONT SIZE=3D"2"><FONT FACE=3D"Arial">I've been wo=
rking with a couple of guys in Norway on this(I'm in US). We use the &=
quot;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. Th=
e program takes the G data and drives a servo. The servo pushes down o=
n the diaphragm of a pressure regulator that controls the pressure to the su=
it.<BR>
</FONT></FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT COLOR=3D"#0000FF"><FONT SIZE=3D"2"><FONT FACE=3D"Arial">The max pres=
sure 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 s=
tarting to hurt.<BR>
</FONT></FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT COLOR=3D"#0000FF"><FONT SIZE=3D"2"><FONT FACE=3D"Arial">I use mine m=
ore 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 p=
art of the regulator. By having immediate response, changes in G feel =
like real motion(inertial forces).<BR>
</FONT></FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT COLOR=3D"#0000FF"><FONT SIZE=3D"2"><FONT FACE=3D"Arial">I locate my =
compressor 50' away in another room. The rig makes a fair amount of hi=
ssing a farting; I wrap a towel around it and reduce most of the noise.<BR>
</FONT></FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT COLOR=3D"#0000FF"><FONT SIZE=3D"2"><FONT FACE=3D"Arial">There's info=
here:<BR>
</FONT></FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT COLOR=3D"#0000FF"><FONT SIZE=3D"2"><FONT FACE=3D"Arial">http://www.s=
impits.org/forums/viewtopic.php?topic=3D55&forum=3D1&28 <http://www.s=
impits.org/forums/viewtopic.php?topic=3D55&amp;forum=3D1&amp;28> <BR>
http://forums.frugalsworld.com/vbb/showthread.php?s=3D&threadid=3D20800 <=
;http://forums.frugalsworld.com/vbb/showthread.php?s=3D&amp;threadid=3D20800=
> <BR>
</FONT></FONT></FONT><FONT FACE=3D"Verdana"> <BR>
</FONT><FONT COLOR=3D"#0000FF"><FONT SIZE=3D"2"><FONT FACE=3D"Arial">Craig R.<BR>
</FONT></FONT></FONT><BLOCKQUOTE><FONT SIZE=3D"2"><FONT FACE=3D"Times New Roman=
">-----Original Message-----<BR>
<B>From:</B> simpits-tech-admin@simpits.org [mailto:simpits-tech-admin@simp=
its.org]<B>On Behalf Of</B> Albert<BR>
<B>Sent:</B> Saturday, June 14, 2003 7:30 PM<BR>
<B>To:</B> simpits-tech@simpits.org<BR>
<B>Subject:</B> [simpits-tech] Gsuit-Aircompressor-F4<BR>
<BR>
</FONT><FONT FACE=3D"Arial">I think someone has already been using a air comp=
ressor controlled by a computer to inflat a Gsuit for their flight simulator=
?<BR>
<BR>
My Gsuit is coming in on Wednesday (Thanks to Sukit from Thailand) and I wa=
s 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? <BR>
<BR>
My other concerns are the noise factor from the compressor...as well as the=
pain factor :)<BR>
<BR>
Thanks in advance,<BR>
<BR>
Al<BR>
Sydney, Oz<BR>
</FONT></FONT></BLOCKQUOTE></BLOCKQUOTE><FONT FACE=3D"Verdana"><BR>
</FONT></BLOCKQUOTE><FONT FACE=3D"Verdana"><BR>
</FONT>
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