Performance

Question 0

What is the temperature lapse rate?

Answer 0

2 degrees per 1000ft

Question 1

What are the standard temperature, pressure and density at sea level?

Answer 1

15C, 1013mb, 1.0225 kg/m^3

Question 2

What is the pressure lapse rate?

Answer 2

1mb per 30ft

Question 3

Is lift higher on hot or cold days?

Answer 3

Cold

Question 4

Is lift performance best at high or low altitudes? Why?

Answer 4

Low, due to higher atmospheric pressure.

Question 5

What is the definition of pressure height?

Answer 5

The height in ISA that corresponds to the pressure of the current environment, i.e. Pressure Height = elevation +(1013-QNH)*30ft where QNH is the pressure at mean sea level.

In other words, take the actual pressure at sea level, subtract it from the standard sea level pressure, multiply by the lapse rate and use it to correct the actual elevation so that you pick a height that would have the pressure you were currently experiencing if sea level pressure really were 1013 on the day in question.

Question 6

What is QNH

Answer 6

The pressure at mean sea level for a particular location and time (it varies over time)

Question 7

What is BEW

Answer 7

Basic empty weight - the airframe and fixed equipment (no fuel or oil)

Question 8

Define Operating Weight

Answer 8

Operating weight is the same as basic empty weight, but adjusted for the aircraft’s configuration for a particular operation. For example seats are removed for skydiving.

Question 9

What is ZFW

Answer 9

Zero fuel weight - everything except fuel (includes passengers, baggage etc). It does include unuseable fuel though.

Question 10

What is the Ramp Weight

Answer 10

The weight at startup; it includes fuel, passengers, baggage etc.

Question 11

Which can be greater? Ramp weight or MTOW and why?

Answer 11

Ramp weiht can exceed the maximum takeoff weight by the amount of fuel used to taxi.

Question 12

What is MTOW?

Answer 12

The maximum takeoff weight for the aircraft for the environmental conditions, runway length and undercarriage.

Question 13

Define MLW and how it relates to MTOW

Answer 13

Maximum landing weight is the maximum weight for a safe landing for a particular runway length and environmental conditions. It is usually the same as. MTOW for light aircraft.

Question 14

What is the floor loading limit?

Answer 14

The maximum pressure the baggage compartment floor can take without damage.

Question 15

What is TORA

Answer 15

Take Off Run Available (length of runway)

Question 16

What is the Takeoff Run?

Answer 16

The distance the wheels remain on the ground

Question 17

Why is TODR more than TORA?

Answer 17

Takeoff is complete at 50ft so the takeoff distance available includes obstacle clearance to reach 50 ft.

Question 18

What is LDA?

Answer 18

Landing distance available (length of runway)

Question 19

What are two acronyms which refer to the length of the runway?

Answer 19

LDA and TORA

Question 20

What is the TODA?

Answer 20

The distance actually required to reach 50ft

Question 21

LDR is the distance required to do what and from where?

Answer 21

Come to a full stop from 50ft.

Question 22

The P charts are used to calculate what? What are the factors to include in a P chart reading?

Answer 22

The weight limits for a particular strip (or by working backwards, the TODR). You incorporate wind direction and strength, slope, density and runway surface.

Question 23

What is the name for the distance needed to reach a full stop from 50ft?

Answer 23

LDR