bumper wrote:
Chris,

I used a handheld anemometer (Kestrel or La Crosse) set on meters/second to
quantify the flow from a cockpit vent when I was improving the flow in my
first glider.

As suggested by others, a manometer would work as well, but I had the
anemometer handy. You do have to measure at the same distance form the vent
each time, of course.

bumper


"chris" wrote in message
...
I was hoping to work on sealing the canopy frame, control connections
etc, as well as adding an air exhaust to increase the ventilation.
If I were to increase the ventilation in the cockpit and try various
options can you think of any easy ways to test and compare how
effective different options are?
Is there some easy way to measure airflow coming in [at a certain air
speed] on one flight versus a later flight?

Because IGC loggers are vented to the cockpit and respond more rapidly
to small pressure changes than a mechanical altimeter, you might be able
to test the pressure difference with your logger. While flying at a
steady speed, open/close the vent, while noting the change in altitude.
Later, you can convert the altitude change to pressure changes.

I suggest a 1 second logging rate if you want to record the tests.


--
Eric Greenwell - Washington State, USA
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