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Date: Thu, 26 Jan 2006 00:28:36 -0500
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From: "richard  titsworth" <rtitsworth@mindspring.com>
Subject: RE: [LML] Re: Built in Oxygen
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In-Reply-To: <list-952922@logan.com>

John,

Thanks for the O2 info.  I'm early in the build process, but have been
thinking about O2 - along with 1,000,000 other little things.  Some
questions....

In your pics, the O2 tank (bottle) appears to be on the "right" side of the
baggage compartment (text below says left)?  Am I looking at it wrong?  What
size is the bottle?

Just curious, what are the intercom jacks next to the O2 filler for?  Are
these below the luggage floor???

What type of hose/tube connects the filler port to the bottle (looks like
copper)?  Any special rqmts given the high pressure?

The filler port looks to be fairly close to the wall/bulkhead it's mounted
to.  Have you researched what a common FBO O2 hose/fitting/wrench looks like
- is there enough room for the line guy to easily connect it? 

I currently have a portable (MountainHigh) system.  My experience has been
that many FBO's charge a flat rate for a fill, i.e. no way to meter the
quantity.  Do you have a "strategy" on when to top it off?

I've contemplated a "two medium-size bottle system" to fit "under" the floor
and to facilitate a "use to (near) completion then switch to Bottle#2"
strategy.  Perhaps it's not worth the added complexity (and cost) of two
bottles and shutoffs.  Basically, this would be the same as refill when it's
1/2 empty unless mission rqmts dictate otherwise.  Thoughts???

Do you have any sort of "quick disconnect" where the lines/tubing connect
with the bottle to facilitate getting the bottle filled remotely and/or
exchanging bottles?  Some medical supply places will refill "aviation"
bottles without a prescription (my field does not have O2).  Despite the
folklore regarding "aviation" O2, my understanding is that it is all the
same (i.e. dry).  Hospitals sometimes add moisture during the delivery -
hence the folklore regarding medical O2 being different from Av O2.  Any
knowledge to the contrary?

Your link also has pics of the 4 place regulator.  I'm assuming it is in the
overhead?  Is there also a regulator at the bottle (to step down the
pressure), or is there high pressure O2 tubing going to the overhead
regulator?  I've been curious as to whether to have high pressure 02
lines/tubing in the cabin.  Primarily for a remote pressure gauge, but the
same concern.

Do you also have a bottle pressure gauge on the panel (so you can see how
much is left inflight)?  Is it feed by a small high pressure line or remote
electronic?

Do you also have a remote on/off value from the cockpit/panel?  Manual or
electric/servo?

Rick

p.s. FYI, my portable MountainHigh system has a electronic the pulse
metering device - it works great, automatically compensates for altitude, is
very efficient on O2, error light on low O2, and works with any typical low
pressure O2 feed.  I plan on using it with my build-in system.