On Wednesday, September 25, 2013 8:12:40 AM UTC-6, Dan Marotta wrote:
Agreed, but is there anything *legal* that suits your needs and yet is

certified above 10,000'? You don't really need O2 below that.



How about something proper, that's really small (fits behind the seat, etc.,

is easily removeable, and can be filled after each flight?



"Bill D" wrote in message

...

On Tuesday, September 24, 2013 10:41:31 AM UTC-6, Dan Marotta wrote:

What have you guys got against a proper oxygen system?





1. Size

2. Weight



Especially in 2-seaters, a decent sized compressed O2 system eats into the

allowable cockpit payload and often takes up space the pilot would rather

use for something else.

I think any portable O2 system is "legal".

I've searched the FAR's without finding mention of Oxygen other than 91.211, 121.333, 121.237 and 135.89 which just spell out when a flight crew has to use it.

The AOPA has a good article at:
http://www.aopa.org/Pilot-Resources/...se-in-Aviation
I like the part which says "oxygen is oxygen" and the use of ABO or some other source is "at the operators discretion".

LOX systems are "use it or lose it" since it eventually boils off whereas compressed O2 systems can set almost forever without losing pressure. There has to be a convenient way for patients who need LOX all the time to get refills.