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#31
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Looking for A-14 (or similar) pressure breathing diluter demand regulator
The diluter-demand function of the A14, from what I have read, occurs below a certain altitude, 30,000' if I recall correctly. In this mode the mixing chamber mixes cabin air with O2 and the amount of O2 increases with altitude. Above this altitude it supplies 100% O2. The pressure breathing function is a separate function that has different dial settings for increasing altitudes. Here the pressure of the O2 supplied not the mixture to the mask increases. The markings on the A14 dial suggest 5 different pressures for settings of Safety, 41,000', 43,000', 45,000', & above 45,000'. Not sure why the 1st dial setting is marked Safety but it is the 1st position when the dial is turned off normal.
I've read the same about blood boiling. I think, as you have pointed out, they are referring to an uncontained and uncirculating liquid and meant to make a point about how low the pressure is. Articles I've read also use statements like "seems to boil" instead of boils. I guess the body can contain the vapor pressure sufficiently so it doesn't reach atmospheric pressure and really boil. Apparently the skin will expand and early experiments with dogs in space or a vacuum chamber discovered this. Saliva boiling on the tongue makes sense. I do plan to get experience in a hypobaric chamber and am hoping they will let me use my own mask, regulator, and bottle however, I suspect this might be considered a liability for then to allow. I still plan to ask. What better way to test the performance of the system I intend to use at FL350-400! |
#32
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Looking for A-14 (or similar) pressure breathing diluter demand regulator
Just updating my initial post with availability and cost of New Surplus (NS) A14 regulators manufactured by FPI in 1990 with part #1550. These are new in the original OEM packaging. Stock is currently 10 units and the cost is $600 per unit. Let me know if anyone needs a unit and I will put you in touch with the shop in CA that is stocking these. Also, if anyone knows of a shop that can overhaul these units besides FPI, and especially someone out west, please advise.
Jim VVII |
#34
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Looking for A-14 (or similar) pressure breathing diluter demand regulator
Wow, thats quite some history Bob! I need to read up on wave history a lot more! Did you ever track any of the flights from up in Cowley, Alberta at the so called Diamond Mine? I had my 1st wave flight there about 9 years ago and I was hooked! I also learned a few new acronyms from you-FWIW and YMWV I could decipher but RAS? Silent Leader? Appreciate all your comments and I do look forward to a chamber ride before committing to anything above FL300! This is purely a recreational pursuit and one of several gliding challenges for me but it's definitely not to be taken lightly as my two favorite aviation sayings remind me......1) takeoffs are optional but landings are mandatory &...... 2) I'd rather be on the ground wishing I was in the air than (very high) in air wishing I was on the ground!
Jim VVII |
#35
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Looking for A-14 (or similar) pressure breathing diluter demand regulator
FWIW.....for what it's worth
YMMV.....your mileage (situation) may vary RAS......recreational aviation....Soaring...(this forum where you're posting...) |
#36
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Looking for A-14 (or similar) pressure breathing diluter demand regulator
Got the 1st two. RAS, of course-too obvious!
Jim VVII |
#37
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Looking for A-14 (or similar) pressure breathing diluter demandregulator
On 12/19/2018 3:05 PM, wrote:
Wow, that's quite some history Bob! I need to read up on wave history a lot more! Did you ever track any of the flights from up in Cowley, Alberta at the so called Diamond Mine? I had my 1st wave flight there about 9 years ago and I was hooked! Snip... The only "tracking" of which I'm aware related to Cowley wave soaring is the book "Stalking the Mountain Wave" by Ursula Weise. My (autographed!) 2nd edition copy has a 1997 copyright. I've never been to Cowley. In fact, the only time I've been to Canada (with a friend to purchase an L13 some years ago for a 3rd party), U.S. Customs didn't want to readmit us...so I've been reluctant to leave the country ever since, eh? (True tale!) Bob W. --- This email has been checked for viruses by AVG. https://www.avg.com |
#38
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Looking for A-14 (or similar) pressure breathing diluter demand regulator
Yes, I met Ursula. She's married to Tony Burton an active CuNim pilot. I have the book as well but mine is not autographed! Cowley is THE wave destination in Canada.
Wonder if that L-13 you picked up was from CuNim? They sold one to Lee Cook I think flying out of Crystal. ISK if I'm not mistaken. I trained in that ship and I heard it got written off not long after it arrived in CA. Most of the L13s were grounded soon after that. Great 2-place workhorse. Jim VVII |
#39
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Looking for A-14 (or similar) pressure breathing diluter demandregulator
On 12/19/2018 5:58 PM, wrote:
Yes, I met Ursula. She's married to Tony Burton an active CuNim pilot. I have the book as well but mine is not autographed! Cowley is THE wave destination in Canada. Wonder if that L-13 you picked up was from CuNim? They sold one to Lee Cook I think flying out of Crystal. ISK if I'm not mistaken. I trained in that ship and I heard it got written off not long after it arrived in CA. Most of the L13s were grounded soon after that. Great 2-place workhorse. Jim VVII Fuzzy memory says the pickup was in BC (Hope?), ultimately destined for Oklahoma... Bob W. --- This email has been checked for viruses by AVG. https://www.avg.com |
#40
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Looking for A-14 (or similar) pressure breathing diluter demand regulator
Fuzzy memory says the pickup was in BC (Hope?), ultimately destined for
Oklahoma... Bob W. --- This email has been checked for viruses by AVG. https://www.avg.com Your fuzzy memory is correct about Hope. You picked up the Vancouver Soaring Associations L-13 C-GZEU. Dearly loved and much missed by me - and many others in the club. It was the first glider I ever flew in, I did my first solo and also made my first flight as a licensed pilot in that ship too. She was essentially timed out though as Transport Canada enforced the factory life limits and getting an extension of 250 hours would have been financially prohibitive. I remember coming out to the airport so you could pick her up. Sorry to hear about the re-entry difficulty and I certainly wish the wing AD hadn't grounded the L-13 a few years later. I also remember being surprised that the guy who wrote a series of books that I had read multiple times was one of the guys who came to collect the glider! |
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