01 Introduction To Performance

Question 1

What is the criteria for an AC to be a Class A AC?

Answer 1

• All multi-engine jet engine AC
• Multi-engine turbo prop with
• 10+ PAX seats and/or
• MTOW more than 5700kg

Question 2

What is the criteria for an AC to be a Class B AC?

Answer 2

• All prop AC with
• 9 or less PAX seats and
• MTOW less than 5700kg

Question 3

Comparatively, how do Class A and Class B AC compare with regards to Air Worthiness regulations and Operating regulations?

Answer 3

• Class A have the most stringent Air Worthiness regulations and therefore have less stringent Operating regulations.
• Class B have the least stringent Air Worthiness regulations and therefore have the most stringent Operating regulations.

Question 4

What is the purpose of planned performance?

Answer 4

To determine the maximum AC weight at different stages of flight to ensure predetermined level of safety

Question 5

What is Measured Performance?

Answer 5

• Average performance
• Pre-production AC
• Skilled test pilots
• Across a range of configurations
• All engines and, if applicable, one engine out

Question 6

What is the Gross Performance?

Answer 6

• Average performance of a Fleet of AC
• Well maintained and flown by average pilots
• How the AC will perform on an average day
• Worse than Measured Performance

Question 7

What is Net Performance?

Answer 7

• Gross performance with an added safety factor
• Less than Gross performance
• Used to determine the safety related performance limiting masses

Question 8

When are safety factors required regarding a specific event/incident/accident?

Answer 8

Safety factors are required when the probability of an event/incident/accident is greater than 1 in 1 million

Question 9

What is the definition of remote probability?

Answer 9

When a passenger buys a ticket for a flight the safety margin must be less than 1 in 1 million

Question 10

What factors will increase the required safety factor for an event?

Answer 10

• If the probability of it happening increases

- The range of the acceptable performance achieved is wider

Question 11

Comparing (i.e. Larger or smaller) Net vs Gross for:

• Landing distances
• Climb gradients
• Descent gradients

Answer 11

• Net landing distance > Gross landing distance
• Net climb gradient < Gross climb gradient
• Net descent gradient > Gross descent gradient

Question 12

Name the parts of an Aerodrome

Answer 12

• TORA: Take Off Run Available. Where an AC can begin its take off run to where the surface can no longer bear the weight of the AC under normal circumstances
• Stopway: Obstacle-free area as wide as the runway which can be used for an aborted take-off
• Clearway: Rectangular area at end of runway. Clear of any non-frangible obstacles greater than 0.9m. Extends from centre line by 75m. Has an upslope of 1.25%
• TODA: Take Off Distance Available. Lesser of TORA + Clearway or TORA * 1.5
• ASDA: Accelerated Stop Distance Available. TORA + Stopway

Question 13

Within a PCN what is the margin allowed for:

• Rigid
• Flexible

Answer 13

• Rigid: 5%

- Flexible: 10%

Question 14

What are the 4 phases of flight where most fatal accidents occur?

Answer 14

• Final Approach
• Landing
• Take Off
• Initial Climb

Question 15

What is the definition of a Balanced Field?

Answer 15

Where the TODA = ASDA

Question 16

What does it mean if an AC ACN number includes an R?

Answer 16

It is only certified to land on Rigid runways

Question 17

What speeds are used for a Turbo Prop, Jet or Prop?

Answer 17

Prop speeds

Question 18

What is the approximate value of Vmd relative to the stall speed for:

• Jet: clean
• Jet: flaps
• Prop: clean
• Prop: flaps

Answer 18

• Jet, clean: 1.6 Vs
• Jet, flap: 1.4 Vs
• Prop, clean: 1.3 Vs
• Prop, flap: 1.2 Vs