When to go to 1013mb?
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Glueball
Not sure why anyone would want to set a QNE in the climb. It is a common misconception that QNE is the Standard Pressure setting. It isn't.
It is the indication which will be shown on your altimeter at a defined aerodrome when 1013.25 is set as your pressure datum.
(ICAO PANS Doc 8400)
when climbing the altimeter is reset to QNE when leaving Transition Altitude
It is the indication which will be shown on your altimeter at a defined aerodrome when 1013.25 is set as your pressure datum.
(ICAO PANS Doc 8400)
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My Jeppesen Airway Manual, Introduction, Chart Glossary, page 10, defines QNE - "Altimeter setting 29.92 inches of mercury, 1013.2 hectopascals or 1013.2 millibars." During the climb it is set as such upon leaving Transition Altitude.
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GlueBall
You cannot set QNE on an altimeter. As PPR says, it is the reading (in ft or m) that you will get at a particular airfield with the altimeter set to 1013.2HPa.
The reason for not doing the experiment in RVSM was nothing to do with the transponder but I didn't think it wise in busy airspace with 1000ft separation. Did it over Africa, daytime, VMC with the autopilot locked on the other altimeter. The difference between 1013HPa and 1013.2HPa is just over 5ft.
Airclues
You cannot set QNE on an altimeter. As PPR says, it is the reading (in ft or m) that you will get at a particular airfield with the altimeter set to 1013.2HPa.
The reason for not doing the experiment in RVSM was nothing to do with the transponder but I didn't think it wise in busy airspace with 1000ft separation. Did it over Africa, daytime, VMC with the autopilot locked on the other altimeter. The difference between 1013HPa and 1013.2HPa is just over 5ft.
Airclues
