What would be the result of flying that through 1500fpm updrafts and
downdrafts
with a level indication?
After my previous post I was thinking about
that. I've not yet flown with a TruTrak ADI so this is speculation on
my part. I guess a lot depends on whether the ADI senses
just acceleration or also detects rotation about an axis. My guess is
that in turbulence, where you're bouncing up and down a lot, the pitch display
on the ADI will behave very much like a conventional gyro driven
instrument. I'm not fond of moderate turbulence, or worse, and
generally try to avoid it. But my experience has been that turbulence
tends to upset roll more than pitch and it appears the ADI displays bank
angle directly so it should be a good instrument for maintaining wings
level. If you get caught in a sustained downdraft, for example, it
sounds to me like the ADI will show a nose down pitch as long as you are
descending. I think you would have to arrest the descent to get a
level indication. This is where the ADI will behave differently than a
conventional gyro and might take some getting used to. I would very
much like to hear from pilots who have flight experience with the TruTrak
ADI.
Tom Gourley
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