Rationale behind vacuum instruments
In rec.aviation.piloting Thomas Borchert wrote:
This was written by someone obviously too young to have ever driven a
car with manifold vacuum powered windshield wipers and little to no
understanding of real engines.
This was written by someone running his AIRCRAFT engine at full
throttle at the altitudes used by many of us. A throttle setting that
will yield no usable manifold "pressure". A car is operated
differently.
I was talking about the other guy, not you.
If you too are too young to have had the experience, vacuum windshield
wipers did something different everytime you changed throttle setting;
sometimes they stopped totally, sometimes they went like hell.
--
Jim Pennino
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