On Aug 24, 6:53*pm, " wrote:
On Aug 21, 9:35*pm, Tim Taylor wrote:

Are there any working designs for an air extractor for the Ventus 2?

What is an air extractor?

Bill Snead

It's an air exit for the cabin air. Some of the new gliders are being
offered with them. The DG website had quite a writeup on them a
couple years ago. In theory, without the extractor, the cockpit is
at positive pressure with the intake vents open and the air finds ways
to escape that are not helpful drag-wise. By using an extractor, cabin
pressure is dropped, and airflow is not disturbed by the air trying to
escape through aileron hinges, spoiler boxes, or whatever.
I have a simple 'Mandl Extractor' I made for my glider, and I have NO
idea what it does for performance, except that it encourages airlfow
in the cockpit, and keeps me from roasting to death on those high
temp, strong inversion layer Jean summer days.