On Tue, 21 Apr 2015 22:30:16 -0700, krasw wrote:

I agree that AH is not a major advantage to T&B while thermalling inside
cloud. GPS with map display is, compared to plain compass. I have flown
most of my imc with T&B only (partial panel?), and now couple of years
with AH added (national rules require T&B in any case). I've found
couple of instances where AH gives added safety:

1) Straightening up after prolonged thermalling, or centering inside
cloud. You just nail the correct pitch additude every single time with
AH.

2) Severe turbulence, usually at the top of cloud. Flying straight and
level with AH is much more accurate.

Thanks for that - useful information.

One question: I haven't tried this, but my guess is that a mechanical T&B
will come up showing the correct reading if it is switched on while
turning. It will do this because what it shows is the amount a spring is
deflected by the precession force a gyro applies to it when the aircraft
yaws. Am I right in thinking this?


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martin@ | Martin Gregorie
gregorie. | Essex, UK
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