Stick Monkey Slang for Moles - The Numbers Flashcards
Define: Rotation Speed (Vr)
Speed at which rotaion from ground run to liftoff attitude is initiated.
Define: Takeoff distance
Total ground run distance plus distance required to attain a height of 50ft above the runway or to clear a 50ft obstacle.
Define: Critical Field Length (CF)
Total length of runway required to accelerate with maximum power on all engines, lose one engine, then continue the takeoff attaining a 50ft AGL, in the same distance that the aircraft can stop with brakes only on the runway.
Define: Refusal Speed (V1)
Maximum speed to which the aircraft can accelerate, with maximum power on all engines, and then stop, with brakes only, in the available runway length.
Define: Go-Speed (Vgo)
Speed at which pilot becomes committed to continue the takeoff. If runway length is = to or greater than critical field length.. Vgo is the slower of Refusal Speed V1 or rotation speed (Vr).
If critical field length is greater than runway length what is Vr = to?
Vr must = Vgo.
What is the significance of Vgo?
If an emergency occurs before Vgo, the pilot has the option to abort the takeoff and stop the a/c on the runway.
If runway length is = to or > than critical field length what is Vgo the slower of what two numbers?
Refusal Speed (V1) or rotation speed (Vr).
If critical field length is > than runway length then what must Vgo =?
Vr.
Explain the significance of taking off of a runway that is shorter than the critical field length.
NATOPS states takeoffs shall not be conducted in situations like this unless operationally required. There is a portion of the takeoff roll when the a/c can neither takeoff nor abort on the remaining runway when one engine fails.
If the aircrew find themselves in a situation that has runway length shorter than critical field length, what are their options if there is no operational requirement to takeoff?
Wait for the environmentals to changes (Temp, winds, etc) of reduce the gross weight of the a/c. This is due to the factors you enter the critical field length chart in NATOPS with. By changing these variables the graph line changes and may allow to runway length to either = or exceed critical field length and therefore allow the aircrew to takeoff.
Can the HE2K a/c takeoff with STAB AUG on? Does this change for landing?
No, takeoff with STAB AUG on is a prohibited maneuver. Landing with STAB AUG on is permitted depending on the environmental conditions (primarily the winds).
For landings when there is a significant cross wind component what are some of the gouge numbers you can use for whether the landing is not recommended or you should look up the specific numbers in NATOPS.
Over 20 kts of crosswind with a relative bearing to the runway starting at around 50 degree, is when NATOPS may recommend not landing in those conditions.
What are the 3 critical speeds that must be calculated for each takeoff?
Go speed (Vgo), rotaion speed (Vr), and speed for the best single engine rate of climb.
