Which symbol represents the rotation speed of an aircraft?

The symbol that represents the rotation speed of an aircraft is typically denoted as "VR." This is the speed at which a pilot initiates rotation during the takeoff phase, allowing the aircraft to lift off the ground. This speed is crucial because it is determined based on various factors including the weight of the aircraft, environmental conditions, and the specific aircraft design.

In the context of aviation, "VR" is one of the key speeds that pilots must be aware of for ensuring a safe and effective takeoff. Achieving this speed allows the pilot to pull back on the control yoke or stick, angle the aircraft's nose upward, and facilitate the transition into flight. Understanding and adhering to "VR" is essential for maintaining aircraft control and safety during critical phases of flight.

The other symbols listed represent different parameters in aviation. For example, "VMGC" refers to the maximum glide speed in the clean configuration, "VS" represents the stall speed, and "VRS" pertains to the recovery speed related to stall recovery. However, none of these terms directly signify the rotation speed during takeoff as "VR" does. Thus, "VR" is the appropriate choice for representing the rotation speed in an aircraft.