Certified Flight Instructor (CFI) Practice Exam

What does the term Vc represent in aerodynamics?

1. Design landing speed

2. Design cruising speed

3. Design takeoff speed

4. Design maneuvering speed

The correct answer is: Design cruising speed

In aerodynamics, the term Vc specifically represents "Design cruising speed." This speed is significant as it is a key performance parameter for an aircraft designated by manufacturers. Vc is typically determined based on the characteristics of the aircraft's aerodynamics, weight, and intended operational envelope, ensuring optimal fuel efficiency, range, and handling during cruise flight. Understanding this speed is essential for flight planning and performance calculations, as it allows pilots to operate the aircraft within its designed capabilities for cruising, which is crucial for safe and efficient flight operations. The other terms associated with speed, while related to aircraft performance, refer to different aspects. Design landing speed pertains to the specific speed during the landing phase, design takeoff speed is the required speed to safely leave the ground, and design maneuvering speed is the maximum speed at which full deflection of flight controls can be applied without stalling the aircraft. Each of these speeds is vital for different flight phases but does not pertain to cruise operations in the same manner as Vc does.