Greg,

 

Even 320's can fly high.  On trips to and from Oregon, I usually flew between 13000 and 17000 MSL.  Nothing special was done to the engine or plane (except for using the Lightspeed electronic ignition).  The best system I have used is a Mountain High 8 cu ft bottle and their demand delivery system that uses a small and comfortable cannula.  The bottle was easily mounted behind the pilot seat and I would use less than half for the trip from OR to IL.

 

PS, the passenger (if any) would be supplied with a disconnected cannula (no need for a second supply device) and would soon fall asleep.  Ah, such quiet bliss high above Mother Earth.

 

Grayhawk 

 

For those of you who have 360s, have you flown at high altitudes?  How often?  What special equipment do you have on your planes to handle thin air, cooler temperatures, etc.?  How much oxygen capacity?  What flow rates?  Is it worthwhile to even go to those high altitudes?  What advantages have you actually realized (besides bragging rights)?    I have an extended wing, low compression, LNC2 with 3-blade composite prop and room for oxygen.  Don't use plane for business but often fly long cross-country legs to visit family and friends. Maybe high altitudes are not for me but I can think of several nights I've spent in hotels 'cause I couldn't go higher to avoid icing, wx and winds.    Greg Nelson