What does Vref stand for?

What does Vref stand for?

• A. Ground Speed
• B. Reference Speed
• C. Referenced Speed
• D. Velocity Reference

Answer: (C)

Vref is the reference speed used for approach and landing. It’s the target airspeed you aim to fly during the final approach with the landing configuration, chosen to provide a safe margin above stall. This speed is based on the aircraft’s weight and flap/settings and is typically around 1.3 times the stall speed in landing configuration, giving you a stable, controllable descent toward the runway. On the DA20-C1, you’d monitor the airspeed and fly to hold Vref on final, adjusting power as weight changes to stay at that target speed. Ground speed varies with wind, so it’s not what Vref represents. The terms “referenced speed” or “velocity reference” aren’t the standard way we describe this concept.

Vref is the reference speed used for approach and landing. It’s the target airspeed you aim to fly during the final approach with the landing configuration, chosen to provide a safe margin above stall. This speed is based on the aircraft’s weight and flap/settings and is typically around 1.3 times the stall speed in landing configuration, giving you a stable, controllable descent toward the runway. On the DA20-C1, you’d monitor the airspeed and fly to hold Vref on final, adjusting power as weight changes to stay at that target speed. Ground speed varies with wind, so it’s not what Vref represents. The terms “referenced speed” or “velocity reference” aren’t the standard way we describe this concept.