Take Off And Landing Performance Flashcards
Approach climb performance requirement
Approach flap, gear retracted, no more than 1.5Vs, 2.1% gross climb gradient (OEI) at go round thrust
OEI FOR APPROACH, NOT FOR LANDING CLIMB OUT.
Landing climb performance requirement
Most restrictive due to all the drag on go around.
Landing configuration for both flaps and gear. 3.2% gross gradient required
Why may V1 not be less than Vmcg
Vmcg is the minimum airspeed at which directional control can be maintained using primary control surfaces in the air. If V1 is slower than VMCG,directional control cannot be maintained following an engine failure at or after go speed with max thrust set on remaining live engine until Vmcg is reached.
How does ASDA and TORA change with a change in V1?
TORA increases with a reduction of V1, if V1 is low, and an engine failure is experienced immediately after V1, distance required to accelerate to required Vr increases drastically.. however ASDA obviously reduces due to the lower momentum/energy with a lower V1
ASDA proportional, TODA inproportional
Balanced field takeoff effect on V1
V1 is the intersection of the two lines, ASDA and TODA on the graph.
Effect of clear way on ASDA and TODA
Only toda uses clearway, so toda increases, however ASDA remains unaffected, as it can’t be used for stopping. Simply an area clear of obstacles for departure
How is ASDR calculated
Distance required to accelerate to Engine failure position, apply Max braking and bring the aircraft to a complete stop
Effect of stop way of TODA
Stop way has no effect on takeoff distance available comma as it is within the clearway and so is Incorporated into that distance. Clearway distance usually greater than stopway.
Formula for calculating net take off flight path NTOFP
12.5% or 1.125 times the distance from screen height or end of take off distance available, TODA.
