I think the point of Dan's question was to inquire whether you have tested
your theory that a GPS-derived HSI's lag is 'dangerous' or not. Everything
I've read suggests that it's perfectly possible to keep the plane upright
using this, although you'll tend to oscillate around your intended attitude
a bit because of the lag. I have a Garmin 196 which has this kind of setup,
but I have not really tried to use it as my primary instrument. I'm going to
do that test soon.

"David Megginson" wrote in message
...
"Dan Luke" writes:

May I suggest that you try it under the hood? I've found that it makes
flying my airplane no-gyro very easy. That may not be true of higher
performance airplanes, I haven't tried it in one.

Personally, the only time I've found flying under the hood or foggles
useful was on cloudy nights over relatively unpopulated terrain --
otherwise, the light and shadows in the airplane make the hood even
less effective at simulating IMC flight than a flight simulator on my
home computer. I recognize that other pilots may have different
experiences, of course, but that's one of the reasons I took my IFR
flight test in IMC, so that I would know if the examiner thought I was
safe in the real thing.

Agreed, but I don't think I'm a good enough pilot to use it safely
in a partial-panel situation, where I'm already under a great deal
of stress.

Try it. I think you'll find it reduces the stress.

I'm worried that it might reduce the stress a little too much, causing
me to fixate on it and ignore the TC and ASI, but I will try it some
time with an instructor or safety pilot anyway.


Thanks, and all the best,


David