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brian
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Joined: 02 Jan 2006 Posts: 643 Location: Sacramento, California, USA
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Posted: Tue Feb 14, 2006 6:48 am Post subject: Oxygen masks |
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Shinden33 wrote:
Quote: | You can buy one of the 55 or 33's with both the boom mic and Oxygen mask? So
it is wired for a mic in both the boom and the mask or do you switch them
out?
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Flight Suits Ltd. in El Cajon, CA, USA.
Quote: | Can you use the military oxygen masks with civilan O2 systems?
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The mask goes with the regulator. They form a system. The military has
long used the diluter-demand regulator that mixes ambient air with O2 in
a proper proportion to maintain the necessary level of O2 in the
breathing mix. At sea level it is set for 100% ambient air and it adds
in more and more O2 until reaching 100% O2 at about 30,000 feet. Some of
these regulators also provide pressure oxygen in that they actually
provide an overpressure (greater than ambient pressure) to the lungs to
force O2 into the bloodstream. Tohat allows you to go as high as about
42,000 feet. (I forget the exact number but I know it was above 40,000'
and below 45,000'.)
The problem with the diluter-demand system is that, while better than
constant flow O2 systems, it is not as efficient as the new pulse-demand
O2 systems. If you want a system that will provide O2 while conserving
your O2 supply so that you don't have to refill your O2 tank as often,
you need to be looking at Mountain High or Nelson O2 systems. These
systems are much better at delivering O2 to your lungs than the much
older diluter-demand system. OTOH, they do not have the pressure O2
capability so if you plan to operate your CJ6A or Yak-52 above 30,000',
you will need to get the diluter-demand regulator.
Mountain High has a mask that was developed to use their pulse-demand
system and can be adapted to your helmet. I don't think Nelson has a
mask but I don't see why the Mountain High mask can't be adapted to the
Nelson pulse-demand regulator as the output of the two regulators is the
same.
I like the Nelson regulator because it does not need electrical power.
It does require you to set an adjusting dial to your altitude just like
the nasal canulas which is something else to remember when you are flying.
The Mountain High regulator requires electrical power but is fully
automatic. You just turn it on and forget it. OTOH, if you lose
electrical power and don't realize it, you could end up just going to
sleep, not a good thing.
http://www.nelsonoxygen.com/
http://www.mhoxygen.com/
Here is the link for the Mountain High pulse-demand mask:
http://www.mhoxygen.com/index.phtml?nav_id=28&product_id=406
Hal "Batman" Morley convinced me of the efficacy of using O2 even at
relatively low altitudes (10,000'). I found that I felt much better
after a long flight if I did so and started doing that regularly. I
installed a permanent O2 system in my CJ6A and enjoyed the benefits,
even when using a nasal canula with helmet. I also found myself
operating my aircraft above 14,000' regularly. The cost of O2 was more
than offset by the ability to reduce fuel costs at the more-efficient
upper altitudes.
--
Brian Lloyd 361 Catterline Way
brian-yak at lloyd dot com Folsom, CA 95630
+1.916.367.2131 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery
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_________________ Brian Lloyd
brian-yak at lloyd dot com
+1.916.367.2131 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery |
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shinden33(at)earthlink.ne Guest
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Posted: Tue Feb 14, 2006 4:48 pm Post subject: Oxygen masks |
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Thanks for the gouge everyone!
Still have a question. If you get standard military diluter-demand system
will it connect to civilian systems. I have never working with aviation O2
systems before so excuse my ignorance on how they all work together.
Scott
--
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brian
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Joined: 02 Jan 2006 Posts: 643 Location: Sacramento, California, USA
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Posted: Tue Feb 14, 2006 5:38 pm Post subject: Oxygen masks |
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Shinden33 wrote:
Quote: |
Thanks for the gouge everyone!
Still have a question. If you get standard military diluter-demand system
will it connect to civilian systems. I have never working with aviation O2
systems before so excuse my ignorance on how they all work together.
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Well, you have the high pressure side coming out of the tank. That is
just a matter of the correct fittings between tank and plumbing, and
plumbing and regulator.
I guess the question is where do you want to connect the diluter-demand
(AN-12) regulator (the AN-14 is the pressure breathing regulator for use
above 35,000') to your civilian system? The output of the tank will feed
the regulator just fine but many civilian systems use a step-down
regulator at the tank so the plumbing throughout the aircraft is only
carrying low-pressure O2.
I would need more details about what you already have in order to tell
you how to hook it up. But, yes, you can use your existing O2 tank to
feed the diluter-demand regulator. It is just that the newer
pulse-demand systems are so much better at utilizing the O2 in your tank.
--
Brian Lloyd 361 Catterline Way
brian-yak at lloyd dot com Folsom, CA 95630
+1.916.367.2131 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery
| - The Matronics Yak-List Email Forum - | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
|
_________________ Brian Lloyd
brian-yak at lloyd dot com
+1.916.367.2131 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery |
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