Thanks, Jim. And thank goodness. It used to be said that you walk outside any
Officers’ Mess in the RAF in England and cock your ear to hear an aircraft
hitting the deck. Some of those aircraft crashed in a gentle dive with a few
degrees of bank – as a result of the failure of the vacuum-driven AI, which
would show a gentle climb with bank in the opposite direction.
But of course this was anecdote from 30 years ago.
Chris
> On 9 Aug 2015, at 17:30, Jim Nichols <jhnichols@xxxxxxxxxxxxx> wrote:
>
> ChrisT & ChrisB,
>
> If I recall correctly, vacuum loss most often resulted from the failure of an
> engine-driven vacuum pump. The plumbing was pretty rugged.
>
> Conversely, the venturi-driven instruments had little to fail besides the
> instrument itself, unless one was in an icing situation where the venturi got
> blocked by ice buildup.
>
> But those days are long gone.
--
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