What does VR stand for in aviation terminology?

In aviation terminology, VR stands for Rotation Speed. This is a crucial speed during takeoff at which the aircraft transitions from a state of ground roll to becoming airborne. At this speed, the pilot pulls back on the control yoke or stick to lift the nose of the aircraft off the runway. Achieving VR is essential for a safe takeoff, as it is the point where the aircraft has sufficient aerodynamic lift to leave the ground.

Understanding VR is vital for pilots because it is calculated based on the aircraft's weight, configuration, and environmental conditions. The correct application of VR helps ensure that the aircraft can safely ascend without the risk of stalling. Other terms, while potentially relevant to flight dynamics or aircraft performance, do not specifically denote this critical phase of flight during takeoff.