Altimetry Flashcards
If height is being used in a question, what pressure setting should you use?
QFE
What travelling from West to east, what FL would you be flying at?
An odd FL
When flying from east to west, what FL would you fly at?
An even FL
Whats the space between the transition level and the transition altitude called?
Transition layer.
What happens to the altitude when QNH > SPS?
It decareses.
What happens to the altitude when QNH < SPS?
It increases.
If the QNH decreases, what happens to the indicated and true altitude if the QNH isnt updated?
Indicated remains constant whilst the true decreases
High to low look out below refers to what to aspects of altimetry?
Pressure and tempurature.
What pressure setting do you use when flying cross country?
QNH
What percentage difference in true altitude for every 10 degrees of ISA deviation.
4%
What is the isa deviation equation?
15-2x(altitude/1000)
What does PIT stand for in altimetry?
Press - indicated - true.
If the ISA deviation is positive what do you to the Temperature Error Correction.
Add it
If the ISA deviation is negative what do you to the Temperature Error Correction.
Minus it.
If the ISA deviation is negative what do you to the Temperature Error Correction.
Minus it.
Whats the temperature error correction equation?
TEC = height/1000 x 4 x IAS DEVIATION
Whilst flying an aircraft at an altitude of 2000 ft, the temperature gradually decreases by 10ºC, what is the expected change to the aircraft’s true altitude?
-80ft
You have two pressure systems. System A is a high pressure, system B is a low pressure. What happens to TA when you go from B to A?
Increases.
If the QFE, QNH and QFF of an airport have the same value..
The airport is at MSL
An aircraft is parked at AB airport with an elevation of 1 411 ft. What altitude should the altimeter indicate if the local QNH setting of 1 023 hPa is set in accordance with the ATIS?
1411ft
What is meant by the term “altitude”? The..
Vertical distance from MSL
Regarding the aneroid capsule of the altimeter, what pressure is it sensitive to?
Low
The atmospheric density is expected to be 50% of the density at MSL in ISA at:
22000ft
