"Gig 601XL Builder" wrote in message
...
Highflyer wrote:
"cavelamb himself" wrote in message
...
All it takes is a little collar on the pitot tube (and a bit of tweaking
the position)

That is how we calibrate the airspeed indicator to get it reading with
reasonable accuracy. Old CG himself taught me that one. :-)

Of course, nowadays, you have to tweak the GPS also!


Anybody have photos of such a collar? Or able to give a good description?

Put an o-ring over the static tube. Adjust its distance from the static
holes in the side of the tube to adjust the static pressure reference for
your airspeed indicator. It also adjusts the static pressure reference for
the altimeter, which usually uses the same static port.

It doesn't work for the new airplanes th at pick up their static pressure
through a port on the side of the fuselage. :-)

Highflyer
Highflight Aviation Services
rec.aviation.homebuilt annual flyin coming up May 16, 17, and 18.
See the faq at http://www.ousterhout.net/pjy-faq.html and send Mary a note
at so she knows how many groceries to get.