Take-off Run, Acceleration, Lift-off
Chapter 12.4
Release Brakes, Power Up for Take-off Roll
STATIC TAKE-OFF
For a static take-off the airplane is stopped at the line-up and hold with the foot brakes. Then the take-off power is set. Still in the stopped position the minimum required take-off power is checked. Only then the brakes are released.
Release Brakes, Power Up for Take-off Roll
ROLLING TAKE-OFF
Also during a rolling take-off the airplane may be stopped in the line-up position. The brakes are then released and the take-off power is set. While the airplane is accelerating, verify that the engine is reaching its minimum required take-off power.
Release Brakes, Power Up for Take-off Roll
ROLLING TAKE-OFF
If the airplane manufacturer does not prescribe a take-off procedure, the rolling take-off may be applied. For airplanes with a fixed-pitch propeller this might eventually be more efficient. However you have to consider that with this procedure you can check the take-off power only when the airplane is already rolling. For pilots with little experience this makes it more difficult to keep the airplane on the runway centerline.
Release Brakes, Power Up for Take-off Roll
ROLLING TAKE-OFF
In order that the brakes are not activated unintentionally during the TAKE OFF RUN, the heels are consciously placed on the floor of the cabin at the beginning of the departure procedure.
Acceleration Checks
Proper Engine power setting must be checked during the acceleration phase.
This control also includes checking the AIR SPEED RISE on the ASI.
Maintaining the Direction of the Take-off Roll
At low speed, the controls have very little effect. The SLIP STREAM EFFECT acts on the fuselage and the vertical stabilizer, causing a tendency to deviate, depending on the power of the engine
This is why, at the start of the take-off roll, the rudder must be held steady by the feet on the rudder pedals which are connected to the nose wheel or with the use of brakes.
This Should Not Happen
- the aircraft to leave the RUNWAY CENTERLINE and moves towards the edge of the runway.
- False Reaction: In order for the aircraft not to come into contact with the edge of the runway or with the runway markings, the pilot will try to pull the airplane off the ground.
- The pilot then attempts to return to the runway centerline using the aileron control.
The airplane rotates around the roll axis, increasing the danger that the tip of the wing touches the ground.
Directional stability during rotation and subsequent climb
Setting take-off power
Lot of rudder input required
Acceleration phase
The amount of rudder input decrease
Rotation
The amount of rudder input required increases again