On Aug 2, 3:25*am, Derek Copeland
wrote:
In that case, I suppose you would have to go onto oxygen a little bit lower
down with thefuselageextractionventfitted!

At 16:40 31 July 2008, Jim White wrote:





Now there is a thought.... Open the airventif you are close to
airspace
to make the logger think you are lower, and fit an extractionventif
you
want that height record.

jim- Hide quoted text -

- Show quoted text -

I made this vent to replace the access hatch for connecting my
controls
http://griderpirate.smugmug.com/gall...55235771_pv8zu
Next weekend I will fly with a manometer to compare static to cabin
pressure with the 'normal' hatch, then the 'Mandl Extractor' hatch. I
can report subjectively that I was MUCH more comfortable in the
cockpit.