What is Refusal Speed (VR)?

Refusal Speed (VR) is defined as the speed at which a pilot determines that if an engine failure occurs during the takeoff roll, there is sufficient runway remaining to safely stop the aircraft. This means that at this point in the takeoff process, the aircraft has not yet reached a speed where takeoff would be necessary, and the pilot can still safely abort the takeoff and come to a complete stop without exceeding the available runway length.

This understanding is crucial for pilots, as it helps them make informed decisions during the critical phases of takeoff. Knowing the refusal speed ensures that pilots can evaluate the risk of continuing with the takeoff versus stopping safely in case of an emergency. The other choices pertain to various important speeds related to aircraft operation, but they do not accurately describe the specific purpose and definition of Refusal Speed, leading to the correct identification of option B.