EP2 Flashcards
(36 cards)
what is Vmcg?
Ground minimum control speed 88 kias
what is Vmcg parameters? when an engine is failed
when an engine is failed, it is possible to maintain directional control using only primary aerodynamic controls without deviating more than 25 feet laterally with all three wheels on the runway
Determined by
- engine at takeoff thrust
- Most unfavorable cg
- Trimmed for TO w/o exceeding 180 lbs of rudder force by pilot with rudder boost
what may increase Vmcg?
crosswind and RCR
what is Vcefs?
Critical engine failure speed is defined as the speed at which one engine can fail and the same distance is required to either continue to accelerate to lift-off speed or to abort and decelerate to a full stop.
what is the definition of S1?
S1 is the go no-go speed. It is defined as being greater than or equal to the highest of Vmcg and CEFS not to exceed the lowest of Vref, vbmax and vrot
Vbmax
and Vrot.
is the s1 is higher than the lowest of refusal speed rotation speed or max breaking speed what must be done?
Take off weight must be reduced
or max breaking speed what must be done? take off weight must be reduced
what is Vb?
max breaking speed. speed where A/C can be brought to stop without exceeding max brake energy limit (14.8 million foot pounds)
what is refusal speed?
Vr. maximum speed that can be attained, with normal acceleration, from which a stop may be completed within the available runway length
refusal speed is compared with ____________ _____________ ____________ __________ and ____________ ___________ in determining s1
ground minimum control
speed rotation speed
What happens to refusal speed when there is a wet runway environment?
Refusal speed is decreased due to reduced braking effectiveness.
When are you required to accomplish an acceleration check?
When S1 does not equal VROT. The check must be accomplished at least 10 KIAS below S1
Where can the takeoff acceleration chart be found?
TO 1T-1A-1CL-1 or Section 3 of the TO 1T-1A-1-1
what are the different brake modes?
manual
power brake mode
anti skid power brake mode
emergency brake
what is manual mode breaking?
Normal hydraulic pressure is not available, have to pump the brakes to get pressure.
what is power brake mode?
Normal hydraulic pressure available, will operate with or without anti-skid system
what is anti skid power brake mode Power brake mode plus an electronic anti- skid system to maximize braking efficiency and prevent skidding
Power brake mode plus an electronic anti- skid system to maximize braking efficiency and prevent skidding
what is emergency braking? P
Powered by stored nitrogen pressure
Where do you find the chart on brake energy limitations?
section V of the dash 1
What occurs at 8.1 million foot-pounds of brake energy?
Thermal fuse plugs may release, resulting in flat tires.
What occurs at 14.8 million foot-pounds of brake energy?
Brake damage or failure may occur.
How much energy is absorbed by the brakes per mile of taxi assuming flat surface?
up to 0.5 million foot-pounds
How much energy is absorbed by the brakes per mile of taxi with a downhill grade?
Up to 2.0 million foot-pounds.
What is the most likely cause of nose wheel steering failure and what should you do?
The torque link pin is not installed. STOP!
In what instances would you abort a takeoff?
If the acceleration check fails or any system emergency affecting safety of flight is experienced prior to S1 speed