TAKE OFF

Question 1

The Net take off flight path is deemed to end when

Answer 1

• The aircraft passes 1500 ft

Question 2

Explain the use of an extended second segment climb

Answer 2

• Rather than retract flap in the 3rd segment the flaps are kept down, and on reaching the 5 min take off thrust time the power is set to MCT. After which the flaps are then retracted, this allows for improved climb gradient but is only to be used for obstacles within the 2nd & 3rd segment, the aircraft must be ‘clean’ by the 400 ft point if obstacle clearance is required in the final segment

Question 3

Reduced thrust take off’s are dependant on

Answer 3

• Field length
• Take off flight path (obstacles)
• Engine inop climb gradients
• Aircraft Take off weight

Question 4

What are the disadvantages of a reduced thrust take off

Answer 4

• Longer climb time

* Higher fuel burn

Question 5

What conditions should reduced thrust take off not be used

Answer 5

• Standing water (ice / slush / snow)
• Mixed engine configuration
• Any non standard take-off

Question 6

What is the reduced screen height for a wet take-off

Answer 6

15ft

Question 7

State the critical engine on a jet during take off

Answer 7

• Nil in head wind

* The most upwind engine in x-wind due to increased yaw if engine fails (weather cocking)

Question 8

What effect does a balanced field have on take-off performance

Answer 8

• A balanced field means that it is critical that an abort is carried out immediately on EF recognition. Also that the t/o on one engine could be marginal if continued as a balanced field is a take off right on the performance limits for the given aircraft weight – not a favourable scenario

Question 9

Definition of 2nd segment of take-off path:

Answer 9

• From gear retraction to level acceleration altitude, which is normally a minimum of 400’ above the takeoff surface. In this segment the gear is retracted, the flaps are in the takeoff
position and the aircraft is set in takeoff power. The speed is equal to V2 (initial climb out speed) and the required minimum gross gradient of climb, in a two engined aircraft, is 2.4%. The net flight path gradient is the gross flight path gradient reduced by 0.8%, i.e. 1.6%.
• Conditions:
• Landing gear is retracted
• The flaps are still in the takeoff position
• The speed is V2
• The minimum gross climb gradient in a twin engined aircraft is 2.4%
• The minimum net climb gradient in a twin engined aircraft is 1.6%; and
• Takeoff power is still set.