VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #21  
Old 06-20-2017, 10:25 AM
dtw_rv6 dtw_rv6 is offline
 
Join Date: May 2008
Location: Martinsville, IN
Posts: 454
Default

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.
Reply With Quote
  #22  
Old 06-20-2017, 07:49 PM
rzbill's Avatar
rzbill rzbill is offline
 
Join Date: Nov 2005
Location: Asheville, NC
Posts: 2,692
Default

Quote:
Originally Posted by BruceP View Post
I like to fly high but even when I don't I find I get a headache around 8,000 feet or so.
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.
Reply With Quote
  #23  
Old 06-20-2017, 08:09 PM
Gisnar Gisnar is offline
 
Join Date: Nov 2012
Location: Northern Nevada
Posts: 137
Default

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!
Reply With Quote
  #24  
Old 06-20-2017, 11:02 PM
BruceP BruceP is offline
 
Join Date: Feb 2007
Location: Bakersfield, CA
Posts: 214
Default

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
Reply With Quote
  #25  
Old 06-20-2017, 11:02 PM
mbauer mbauer is offline
 
Join Date: Nov 2015
Location: Nikiski, AK
Posts: 413
Default 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
__________________
Mike Bauer
N999SN 1998 Syd Nelson RV-6 (purchased 2017)
UTC -09:00 Alaska
Reply With Quote
  #26  
Old 06-20-2017, 11:19 PM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
Posts: 6,797
Default

Quote:
Originally Posted by BruceP View Post
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.
For many years now it's all produced by liquification of air, it all comes out of the same truck.
Reply With Quote
  #27  
Old 06-21-2017, 04:51 AM
rzbill's Avatar
rzbill rzbill is offline
 
Join Date: Nov 2005
Location: Asheville, NC
Posts: 2,692
Default

Quote:
Originally Posted by Gisnar View Post
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!
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.
Reply With Quote
  #28  
Old 06-21-2017, 06:45 AM
krw5927 krw5927 is offline
 
Join Date: Aug 2010
Location: Wichita, KS
Posts: 1,958
Default

Quote:
Originally Posted by bret View Post
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?
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!!!
Reply With Quote
  #29  
Old 06-21-2017, 06:50 AM
Plummit's Avatar
Plummit Plummit is offline
 
Join Date: Apr 2010
Location: Covid Country-SoCal
Posts: 1,081
Default

Quote:
Originally Posted by BruceP View Post
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.
Same stuff. There is no difference.

-Marc
__________________
RV-10
N814RV
2020 Donation Made
Reply With Quote
  #30  
Old 06-21-2017, 07:30 AM
bret's Avatar
bret bret is offline
 
Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,828
Default

Quote:
Originally Posted by krw5927 View Post
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.)
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.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 08:36 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.