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Subject: Re: [LML] Re: O2 for IV-P's
From: Colyn Case <colyncase@earthlink.net>
In-Reply-To: <list-6009124@logan.com>
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I rarely change a subject line but this time I am because LML roots is =
not what this thread is about.

Bill,

There are various philosophies on backup oxygen but what Mountain High =
advised me was to eliminate all possible variables for the backup =
system.  So I have a constant flow system with a big can and no =
electronic controller.  The can is in the cabin, the meter is attached =
to the can, and I can see the meter from the pilot's seat.  The can is =
attached to the rear pressure bulkhead behind the left passenger's head. =
  If the airplane is flying, the main valve is on.   The remote valve is =
in front of the side stick and the mask is in a pouch I can get at with =
one hand while still flying.

I did my capacity planning based on 3 people starting at fl250 and =
wanting to maximize glide (in case I'm over mountains....).    (about 40 =
minutes to zero msl with a full-feathering prop if the engine is dead.)

Negatives on this arrangement are that it's a big can and it's very high =
pressure so I can't refill it myself.
Also, it won't help you extend your fresh air time at fl250 beyond 40 =
minutes if you happen to have a live engine and no pressurization.
Positives are not much to break.

Colyn

On Jan 12, 2013, at 1:17 PM, Bill Wade wrote:

I agree. I've never used an oxygen system before but would like to =
install an emergency system in the IV-P I'm building. For starters, if =
there was a rapid decompression at altitude how quickly can a system be =
activated? Mask or cannula- should they be worn around your neck and =
plugged in just in case? Flow adjustments- I don't know enough yet to =
even ask intelligent questions. Thanks- Bill Wade

-----Original Message----- From: Greenbacks, UnLtd.
Sent: Saturday, January 12, 2013 7:40 AM
To: lml@lancaironline.net
Subject: [LML] Re: LML roots

I for one, would like to see LML return to its roots because in my =
experience, it's been adrift for a while. In other words, discussion of =
building techniques and problem solving and best building practices =
generally as they apply to our Lancairs. As well as interspersed with =
discussion of
how to safely and responsibly fly what a lot of us put together in our =
basements over many years. How about the topic of approach to stalls and =
spin avoidance. Gee, we haven't heard much on this subject in quite a =
while. :-) How about portable oxygen solutions, is there a clear winner =
out there? I plan to test the upper end of the altitude envelope in my =
360 this year so I need to know.
And as for pre purchase advise for a 235/320/360, do your homework and =
go get a ride or 2 or 3 or more. Is there anyone left out there who does =
not know that the 235 gross weight was increased to 1500 lbs over 14yrs =
ago?
Oh, and here's a suggestion that may send a few people running for the =
hills, opinions may be interesting but really ought to be backed up by =
fact.


Cheers,

Angier Ames
N4ZQ
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