On Sat, 25 Nov 2006 16:14:36 -0700, "Matt Barrow"
wrote:


"Mike Noel" wrote in message
...
ps Check out:

http://www.firstmarkaerospace.com/standbycompass.asp


Also, this thing is much less prone to errors:
http://www.aircraftspruce.com/catalo...rd_compass.php
and http://www.pai700.com/index.html

I've had a vertical card compass for years. The Deb had one in it when
I go it so I'd hardly call it a new, let alone "totally new" concept.
Like a whisky compass it does not give the proper heading at all
times. You still have the lead and lag in turns and it won't set
still in turbulence, but it has far less movement than the whisky
compass in turbulence.

Swinging one is about the same. Just don't use runway headings unless
you know they are right. Ours are about 6 degrees plus so 360 is
really 006 and 060 is really 066. Hence the compass rose at some
airports and that set of tools in the instrument shop.





Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com