Name the three modes of flight for the prop-rotor.

• A. VTOL- vertical takeoff and landing; CONV- conversion; APLN- Airplane
• B. VTOL and APLN
• C. VTOL only
• D. CONV and APLN

Answer: (A)

The test is looking for the complete set of flight regimes a prop-rotor can use. A prop-rotor aircraft operates in three modes: VTOL, where the rotor provides vertical lift for takeoff and landing; conversion, the transitional phase where the aircraft blends rotor lift with forward motion as it shifts from vertical to horizontal flight; and airplane, where the wings carry the lift and the rotor mostly acts as a propeller or is not providing lift. The option naming VTOL, CONV (conversion), and APLN (airplane) includes all three modes, making it the best answer. The other choices omit one of the modes or combine them incorrectly, so they don’t fully describe how a prop-rotor can fly.