I think that probably works on an ultralight without an aerodynamic nose
cone. Laminar airflow around a nose cone will be nearly parallel to the
skin at any AOA of interest. That's why the AOA sensor has to be on the
sides of the fuselage.

Bill Daniels

"jcarlyle" wrote in message
...
I was Googling around, and ran across yet another AOA device. Check
out this site:
http://www.adventureairsports.com/aoa.htm
and pay particular attention to the 3rd photograph. Yaw string and AOA
in one, and not very expensive!

-John

On Dec 9, 6:46 pm, "Bill Daniels" bildan@comcast-dot-net wrote:
I think it's likely that the SafeFlight vane-type AOA indicator works
fine
as long as you are fairly good at keeping the yaw string centered.
SafeFlight has been around selling these things to airplane owners for a
long time. It's nice to see them offering a product for gliders.