Terms and Definitions

Question 1

What are the four factors that affect aircraft performance?

Answer 1

1) Aircraft mass/weight
2) Runway enviroment
3) Atmospheric conditions
4) Forces acting on the aircraft

Question 2

Does a heavier aircraft have less climb performance than a lighter one?

Answer 2

Yes

Question 3

What are the four forces that act on the aircraft?

Answer 3

• Lift
• Weight
• Thrust
• Drag

Question 4

What is the lift equation?

Answer 4

Lift = Cl0.5rhoV^2S

Question 5

What is the aspect ratio?

Answer 5

Span^2/wing area

Question 6

Where does an aircraft’s weight act through?

Answer 6

CoG

Question 7

What are the two forms of aircraft drag?

Answer 7

1) Lift-dependent drag

2) Zero-lift drag

Question 8

What factors affect the runway enviroment?

Answer 8

1) Runway Contamination

2) Runways at higher density altitudes will also affect aircraft performance negatively.

Question 9

What does reduced air density do to power thrust and lift?

Answer 9

Reduce them

Question 10

At a high DA, is TAS need to be higher for a constant IAS?

Answer 10

Yes

Question 11

What is Vr?

Answer 11

Rotate speed during take-off

Question 12

What is V50?

Answer 12

Speed at a height of 50 ft during TO/landing

Question 13

What is Vx?

Answer 13

Indicated air speed for the best angle of climb

Question 14

What is Vy?

Answer 14

Indicated air speed for the best rate of climb

Question 15

What is Vtd?

Answer 15

Touchdown speed during landing

Question 16

What is SAR ?

Answer 16

Specific air range which is air nm flown per lb of fuel consumed.

Question 17

What are LRC and MRC?

Answer 17

Long range cruise and Max Range Cruise

Question 18

What is LRC defined as?

Answer 18

The speed at which the SAR is 99% of that achieved at Max Range Cruise

Question 19

How much slower is MRC speeds than LRC speed?

Answer 19

Typically around 10% slower than LRC

Question 20

How much more fuel is consumed flying LRC than MRC?

Answer 20

About 1% more

Question 21

What is SGR?

Answer 21

SAR adjusted for wind known as specific ground range or SGR.

Question 22

What is the definition of Endurance?

Answer 22

• A technique of flying that level flight is maintained but at a fuel consumption is at a minimum
• Max time in the air.

Question 23

What speed should be flown in a jet to maximize endurance?

Answer 23

Min Drag Speed (Vimd)

Question 24

What speed should be flown by a propeller aircraft to maximize endurance?

Answer 24

Min Power Speed (Vimp)

Question 25

What is TORA?

Answer 25

• Take off run available

- The length of RWY declared available and suitable for the ground run of an ACFT taking off

Question 26

What is TODA?

Answer 26

• Take- Off Distance Available

- The length of TORA plus the length of any clearway available

Question 27

What is ASDA?

Answer 27

• Accelerate Stop Distance Available

- The length of TORA, plus the length of the stopway

Question 28

What is LDA?

Answer 28

• Landing Distance Available

- The length of RWY declared available and suitable for the ground run of an ACFT landing

Question 29

What is Take-Off Distance Required (TODR)?

Answer 29

The horizontal distance required:

• To accelerate from a standing start with all engines operating
• To achieve a safety speed at a height of 50 ft above the take-off surface
• Multiplied by a factor dependent on aircraft design criteria and regulations