When landing without power, what is the optimal airspeed with wing flaps up?

The optimal airspeed for landing without power, specifically with the wing flaps in the up position in a Cessna 152, is indeed 65 KIAS (Knots Indicated Airspeed). Maintaining this airspeed is crucial because it strikes a balance between lift and drag, allowing for better control and glide path management during a power-off approach.

At this speed, the aircraft will have sufficient aerodynamic control and a favorable glide ratio, which is important for executing a safe landing. This speed also helps prevent stalling; being too slow could lead to a loss of control if the angle of attack increases excessively.

Flying at 65 KIAS allows the pilot to manage any necessary corrections to maintain the desired glide slope, which promotes a more stable and predictable descent. It is essential to have this knowledge when practicing engine-out landings, as proper speed ensures maximum performance and safety during the critical phases of flight.

In contrast, the other airspeeds listed may not provide the same level of control and glide performance required for a safe landing without power. Each of those alternatives would either increase the risk of stalling or reduce the effectiveness of the pilot's ability to maneuver the aircraft during an emergency landing scenario.