Jeff, say more about why you need a "hard" mask?  is that as opposed to a "soft" mask?

On Jan 13, 2013, at 5:51 PM, Craig Jimenez wrote:

or cannula- should they be worn around your neck and plugged in just in
case? Flow adjustments-

IVP folks have nice cabin altitudes under normal operation, but in the
Meridians and P-Barons I fly, cabin altitudes tend to be in the 8-10,000'
range in cruise.  I've been using a Mountain High pulse demand system with
cannula to stay a little smarter.  I test it before flight and then set it
to provide O2 above cabin alts of 5000'.  A nice benefit is that it will
automatically adjust O2 flow to compensate for cabin altitude, so in the
event of depressurization or failure to pressurize, I have appropriate O2
on and flowing.

Note that a mask must be available above 18,000' (it is possible to forget
to breath through the nose and I guess there needed to be an easily
remembered cut-off altitude for cannulas).  In my case, the mask is part
of the installed (but small and expensive to refill) system.

Craig




--
For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html


--
For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html