On Sat, 16 Dec 2006 11:52:57 -0500, "John R. Copeland"
wrote:

"Ron Rosenfeld" wrote in message ...
On Fri, 15 Dec 2006 06:56:17 -0800, Sam Spade wrote:

Subject line says it all.

If so, what was your impression?

Not yet. But I have flown an LNAV with advisory vertical guidance. The
needles were extremely stable -- more so than an ILS with my equipment.
Pretty easy to fly.


Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)

Yes, the approaches are a pleasure to fly, but the step change in course
width can cause a coupled approach to give a small disturbance, for me.
If the needle isn't exactly centered at the point of switching,
my autopilot hunts for a few moments, until it stabilizes again.
It's a small amount, and not an operational problem, but it makes the GPS
approaches slightly less smooth than an ILS, which doesn't have that bump.
My autopilot is a Collins AP-107.
Who sees any similar effect with other autopilots?

I've not noted a "step change" in my CNX80. The changes in sensitivity are
supposed to be gradual, and at the FAF I believe the "scaling" goes to
angular, to mimic an ILS. But maybe I've just missed it.
Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)