 Altimeter Question
On Apr 18, 7:55 am, Stefan <stefan@mus._INVALID_.ch> wrote:
> WingFlaps schrieb:
>
> >> So an altimeter set to local QNH will always read field elevation *by
> >> definition*.
> > Yes it may say that but it's being loose because it forgt to include
> > the "barometric pressure reduced to MSL by application of the ISA".
> > Alltimeters are calibrated for the standard atmosphere. -right?
>
> Right.
>
> > Think about it, if an ARFOR gives QNH how could it be correct for all
> > terrain if local temperatures differed? I covered this in my PPL tech
> > course -was this not covered in your manuals?
>
> Think about it, nobody said it would be correct for all altitudes, but
> just for one altitude: the airfield elevation.
>
>
Perhap we are at crossed purposes but an ARFOR does not refer to an
airfield -that's a METAR and not all fields issue them. So in this
case how can QNH give field elevation unless it's an ISA day?
Cheers
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