Rotation (aeronautics)

With the rotation point will be identified in the aviation, rotates the plane at the start about its transverse axis. This point is reached when the nose gear lifts.

The pilot raises the nose of the aircraft at each start with a pilot from the previously accurately calculated velocity Vr (pronounced Vi rotate ) to. Once the aircraft reacts and takes off, the speed Vlof ( lift-off ) is achieved computationally, which was established taking into account certain safety margins. Among other things, have been adhered to:

• VMCA (minimum control speed air - to keep even with engine failure, the direction to be able to )
• V1 ( decision speed for takeoff )
• Vmu (minimum unstick speed - so that the buoyancy force is sufficient to wager without Tailstrike can )
• Vs ( stall speed in launch configuration )

The speed of rotation affected quite substantially the length of the required take-off run.

From the point of rotation occur wake vortices behind an aircraft that could endanger other aircraft. Since vortices then sink to the bottom, lighter aircraft should that start directly behind heavier machines, stand in front of their rotation point. Since then lighter aircraft but can not fly a steep departure because of the weaker engine performance, there is a danger that they cross the flight path of the previously lifted heavy machine and yet still come in their wake. So there must be dodged after takeoff due to additional change of flight direction of wake vortex.