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When an aircraft lands with QNH set the altimeter will read?
QNH is the altimeter setting that most general aviation pilots are familiar with when operating in the United States and Canada below 18,000 feet msl. This setting causes the altimeter to read field elevation (above sea level) when the aircraft is on the ground.
How do I get QNH from QFE?
Airfield QNH is obtained by correcting a measured QFE to sea level using ISA regardless of the temperature structure of the atmosphere. As your altimeter is calibrated using ISA, it will indicate altitude correctly at the airfield reference point.
What does QNH and QFE stand for in aviation?
QNH is a pressure value and when an aircraft sets it on the altimeter while on the runway. It will show the ELEVATION of the threshold above mean sea level. QFE is another pressure value and when set as altimeter of the aircraft and when the aircraft is on the runway, it will show ZERO “0” (reference point is meant to be that runway).
What does QNH and QFE mean on an altimeter?
The terms “height” and “altitude”, used in Note 1 above, indicate altimetric rather than geometric heights and altitudes. So QNH and QFE are the pressure settings you put into the altimeter. The “QFE reference datum” isn’t given in any ICAO document but appears to be runway elevation at the threshold.
When do you use a QFE in the UK?
As a civilian pilot, you are only likely to be given a QFE on joining to land at an airfield, and while in the circuit. In the UK, General Aviation traffic typically uses QFE in the circuit, and regional QNH in the cruise.
When is a QFE given to a civilian pilot?
There are still a number of airfields which are used by both the military and civilian flights (eg, RAF Northolt) and flying in there you will be given a QFE. As a civilian pilot, you are only likely to be given a QFE on joining to land at an airfield, and while in the circuit.