Dan wrote:
....

Anyway, for something a little fancier yet, a kind of lift reserve or
AofA indicator that takes two pitot tubes to a differential pressure
gage, shown he about $`125

http://www.pipcom.com/~cowcam/AOAr.htm
....
Brian Whatcott
Altus OK

It's a rather nice system.

What is the purpose of the zip tie around the tube? It's not tight
enough to secure anything.

Dan, U.S. Air Force, retired

I have no great insight into operating this system, but my guess is the
usual one about things on struts - they tend to oscillate in the wind -
and this might damp it out???

Brian W