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06-20-2017, 10:25 AM
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Join Date: May 2008
Location: Martinsville, IN
Posts: 454
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I found a Homedics home filling system on Craigslist. It has an oxygen generator and a 3000 psi compressor. It has already paid itself back to me since local filling in the flatland of indianapolis is usually 100dollars or more.
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06-20-2017, 07:49 PM
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Join Date: Nov 2005
Location: Asheville, NC
Posts: 2,692
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Quote:
Originally Posted by BruceP
I like to fly high but even when I don't I find I get a headache around 8,000 feet or so.
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Ditto. I well remember the first time Diane and I decided to use our new tank after checking with the pulse oximeter. Slightly low, but not much.
The part that was striking was that the headache I didn't realize that I had, went away immediately. It was an eye opener.
__________________
Bill Pendergrass
ME/AE '82
RV-7A: Flying since April 15, 2012. 850 hrs
YIO-360-M1B, mags, CS, GRT EX and WS H1s & A/P, Navworx
Unpainted, polished....kinda'... Eyeballin' vinyl really hard.
Yeah. The boss got a Silhouette Cameo 4 Xmas 2019.
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06-20-2017, 08:09 PM
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Join Date: Nov 2012
Location: Northern Nevada
Posts: 137
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What do you consider a low oxygen saturation? Remember the o2 saturation curve is S shaped. Rapid drop off of oxygen transport occurs at a saturation in the low 80s, not that I am suggesting or recommending anyone fly at those levels.
Best way to find out how you react is to put yourself in a high altitude chamber and see how you are functioning at various altitudes and saturation. We all react slightly differently!
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06-20-2017, 11:02 PM
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Join Date: Feb 2007
Location: Bakersfield, CA
Posts: 214
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I emailed Aerox yesterday as well and they responded immediately(thanks Byron Peters!--no relation). They suggested getting the fill line and getting a big cylinder and filling myself as several of you have suggested.
One of the places I visited yesterday said that medical/aviation oxygen is "dryer" than oxygen used for welding and they didn't have that. That's when they suggested going to the medical supply place. Do any of you know if there is a difference in medical/aviation oxygen? And if so, is it significant enough to worry about it? I'm guessing no given some of the responses on this thread.
__________________
Bruce Peters
Bakersfield, CA
RV-9A, Flying 11/21/15
VAF#1145
Donation up to date 08/20
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06-20-2017, 11:02 PM
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Join Date: Nov 2015
Location: Nikiski, AK
Posts: 413
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AME Can Give Prescription for Medical O2
Next visit to your AME can get you a prescription for 02. Then just find a local home medical supply company.
Yes, you can buy a whip to fill from welding cylinders, but be very careful, one drop of any hydrocarbon substance will cause an explosion. Use No Oil is on all regulators for a reason!
Best regards,
Mike Bauer
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Mike Bauer
N999SN 1998 Syd Nelson RV-6 (purchased 2017)
UTC -09:00 Alaska
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06-20-2017, 11:19 PM
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Join Date: Dec 2011
Location: Livermore, CA
Posts: 6,797
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Quote:
Originally Posted by BruceP
One of the places I visited yesterday said that medical/aviation oxygen is "dryer" than oxygen used for welding and they didn't have that. That's when they suggested going to the medical supply place. Do any of you know if there is a difference in medical/aviation oxygen? And if so, is it significant enough to worry about it? I'm guessing no given some of the responses on this thread.
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For many years now it's all produced by liquification of air, it all comes out of the same truck.
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06-21-2017, 04:51 AM
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Join Date: Nov 2005
Location: Asheville, NC
Posts: 2,692
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Quote:
Originally Posted by Gisnar
What do you consider a low oxygen saturation? Remember the o2 saturation curve is S shaped. Rapid drop off of oxygen transport occurs at a saturation in the low 80s, not that I am suggesting or recommending anyone fly at those levels.
Best way to find out how you react is to put yourself in a high altitude chamber and see how you are functioning at various altitudes and saturation. We all react slightly differently!
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In case that was aimed at my "slightly low"comment, we were both measuring above 90 but about 4 points below what we measured on the ground. So, like I said, slightly low. My wife, being a nurse, was familiar with medical oxygen use and their saturation guidelines and suggested we hook up. It was not a level that I would have expected oxygen to make me feel better. It did.
__________________
Bill Pendergrass
ME/AE '82
RV-7A: Flying since April 15, 2012. 850 hrs
YIO-360-M1B, mags, CS, GRT EX and WS H1s & A/P, Navworx
Unpainted, polished....kinda'... Eyeballin' vinyl really hard.
Yeah. The boss got a Silhouette Cameo 4 Xmas 2019.
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06-21-2017, 06:45 AM
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Join Date: Aug 2010
Location: Wichita, KS
Posts: 1,958
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Quote:
Originally Posted by bret
How many fills can you get out of a single 251, into a 22 CF D tank, say....with the big tank dropping down to 1500 PSI?
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It's a complicated effort so I may have gotten it wrong, but assuming your "K" cylinder from the welding supply is filled to the 2200 PSI spec and you run your 22 CF Jumbo-D cylinder completely empty each time (not recommended), after 4 fills your K cylinder (and your Jumbo D) will be down to just over 1500 PSI.
Or, put another way, you can fill your 22 CF cylinder 9 times to greater than half capacity. 11 CF of oxygen is still useful.
When I was building my system last fall, I realized that paying a little extra for a 300 CF "T" cylinder would result in much greater utility, mostly because of the increased initial fill pressure of 2640 psi. (Make sure not to push your small cylinder pressure that high, though - most are labeled far lower.)
__________________
Kurt W.
RV9A
FLYING!!!
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06-21-2017, 06:50 AM
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Join Date: Apr 2010
Location: Covid Country-SoCal
Posts: 1,081
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Quote:
Originally Posted by BruceP
One of the places I visited yesterday said that medical/aviation oxygen is "dryer" than oxygen used for welding and they didn't have that. That's when they suggested going to the medical supply place. Do any of you know if there is a difference in medical/aviation oxygen? And if so, is it significant enough to worry about it? I'm guessing no given some of the responses on this thread.
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Same stuff. There is no difference.
-Marc
__________________
RV-10
N814RV
2020 Donation Made
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06-21-2017, 07:30 AM
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Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,828
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Quote:
Originally Posted by krw5927
It's a complicated effort so I may have gotten it wrong, but assuming your "K" cylinder from the welding supply is filled to the 2200 PSI spec and you run your 22 CF Jumbo-D cylinder completely empty each time (not recommended), after 4 fills your K cylinder (and your Jumbo D) will be down to just over 1500 PSI.
Or, put another way, you can fill your 22 CF cylinder 9 times to greater than half capacity. 11 CF of oxygen is still useful.
When I was building my system last fall, I realized that paying a little extra for a 300 CF "T" cylinder would result in much greater utility, mostly because of the increased initial fill pressure of 2640 psi. (Make sure not to push your small cylinder pressure that high, though - most are labeled far lower.)
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Hum...interesting, I would have thought you could get more than that from the one 251 tank? I can see why the cascade fill method would work better than one tank. Thanks for sharing this info.
__________________
7A Slider, EFII Angle 360, CS, SJ.
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