On Wed, 04 Apr 2007 16:28:41 GMT, "Steven P. McNicoll"
wrote:


"Ron Natalie" wrote in message
om...

Huh? What does the wind have to do with VOR's. If the needle is
centered, you're within the tolerance of the VOR. The tolerance
is primarily 4-6 degrees. This keeps you inside the airway at
moderate distances from the VORs.


What about at more than moderate distances from the VOR? At 40 miles from
the VOR 6 degrees is 4 miles.

Under the heading of "Enquiring Minds Want to Know:

In defining an intersection, what's the maximum distance from a VOR
that's allowed?

Does an intersection in a GPS database represent the actual
intersection of VOR radials, or is it defined in LAT/LON terms?
(I.e., can there be two locations for an intersection, depending on
whether you're using VORs or GPS?

Apart from shifting declination, what is the mechanism by which VORs
drift out of calibration? Isn't the phase shift for each antenna in
the array set by the length of coax between it and the transmitter?
Does Velocity Factor change significantly as the coax ages? If it is a
matter of aging cable, does that mean the error is uniform and the
pattern is shifted consistently around the compass rose, or are the
longer cables affected more? And in the latter case, how would that
affect the error? (I would think that the higher the radial, the
greater the error, if this were the case.)

(Or do I not understand how a VOR array is phased?)

Don