Ken:
>I know that European METARs report sea-level pressure in
>millibars with a Q prefix; I didn't make the connection to the
>Q-codes. In the US we use inches of mercury
Interesting. My wife flies a 39-year-old Piper Cherokee
(made in the U S of A) and the altimeter is calibrated
in millibars. Of course, they could have fitted millibar
altimeters, knowing the aircraft was destined to fly
in the UK (and abroad - it's been all over Europe and
Ireland and recently to Morocco).
ISTR some gauge or other measures "suction" and is in
inches of mercury.
My boat's oil pressure gauge (the only instrument it has)
is calibrated in "bar".
Dave
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