7. LANDING PERFORMANCE

9322. Which is the correct symbol for the minimum steady-flight speed or stalling speed in the landing configuration?. VS. VS1. VS0.

9323. Which is the correct symbol for the stalling speed or the minimum steady flight speed at which the airplane is controllable?. VS0. VS. VS1.

8374. What effect does landing at high elevation airports have on groundspeed with comparable conditions rela- tive to temperature, wind, and airplane weight?. Higher than at low elevation. Lower than at low elevation. The same as at low elevation.

9074. How should thrust reversers be applied to reduce landing distance for turbojet aircraft?. Immediately after ground contact. Immediately prior to touchdown. After applying maximum wheel braking.

9074-1. Upon landing, thrust reversers. are required to obtain the calculated stopping distances. should be deployed as soon as the nose wheel is in firm contact with the runway. should be deployed immediately upon landing when airspeeds are highest.

9079. How should reverse thrust propellers be used during landing for maximum effectiveness in stopping?. Gradually increase reverse power to maximum as rollout speed decreases. Use maximum reverse power as soon as possible after touchdown. Select reverse-pitch after landing and use idle power setting of the engines.

9084. Under which condition during the landing roll are the main wheel brakes at maximum effectiveness?. When wing lift has been reduced. At high groundspeeds. When the wheels are locked and skidding.

9084-1. When is braking performance optimized dur- ing landing?. Before the nose wheel touches down. Wheel spin-up at touchdown. Maximum weight on main wheels.

8935. At what minimum speed (rounded off) could dynamic hydroplaning occur on main tires having a pressure of 121 PSI?. 90 knots. 99 knots. 110 knots.

8936. At what minimum speed will dynamic hydroplaning begin if a tire has an air pressure of 70 PSI?. 85 knots. 80 knots. 75 knots.

8933. A definition of the term “viscous hydroplaning” is where. the airplane rides on standing water. a film of moisture covers the painted or rubber- coated portion of the runway. the tires of the airplane are actually riding on a mixture of steam and melted rubber.

8938. Compared to dynamic hydroplaning, at what speed does viscous hydroplaning occur when landing on a smooth, wet runway?. At approximately 2.0 times the speed that dynamic hydroplaning occurs. At a lower speed than dynamic hydroplaning. At the same speed as dynamic hydroplaning.

8934. Which term describes the hydroplaning which occurs when an airplane’s tire is effectively held off a smooth runway surface by steam generated by friction?. Reverted rubber hydroplaning. Dynamic hydroplaning. Viscous hydroplaning.

8937. What is the best method of speed reduction if hydroplaning is experienced on landing?. Apply full main wheel braking only. Apply nosewheel and main wheel braking alternately and abruptly. Apply aerodynamic braking to the fullest advantage.

8937-1. Under what conditions might a pilot expect the possibility of hydroplaning?. When landing on a wet runway that is covered in rubber from previous landings. When departing a grooved runway with less than a thousandth of an inch of water. When the adiabatic lapse rate is high, and steam is rising from the landing surface.

8939. What effect, if any, will landing at a higher-than- recommended touchdown speed have on hydroplaning?. No effect on hydroplaning, but increases landing roll. Reduces hydroplaning potential if heavy braking is applied. Increases hydroplaning potential regardless of braking.

8133. What effective runway length is required for a turbojet-powered airplane at the destination airport if the runways are forecast to be wet or slippery at the ETA?. 70 percent of the actual runway available, from a height of 50 feet over the threshold. 115 percent of the runway length required for a dry runway. 115 percent of the runway length required for a wet runway.

9791. Approaching the runway 1° below glidepath can add how many feet to the landing distance?. 250 feet. 500 feet. 1,000 feet.

9792. Arriving over the runway 10 knots over VREF would add approximately how many feet to the dry landing distance?. 800 feet. 1,700 feet. 2,800 feet.

8742. (Refer to Figures 327 and 457.) With a weight of 69,000 pounds, flaps 45, calm winds, the VREF is. 136 knots. 133 knots. 129 knots.

8743. (Refer to Figure 460.) At a weight of 77,500 pounds, and a landing elevation below 5,000 feet, the VREF is. 139 knots. 141 knots. 143 knots.

8744. (Refer to Figures 331 and 461.) At a weight of 73,500 pounds, the expected landing field length is. 6,700 feet. 5,650 feet. 6,450 feet.

8745. (Refer to Figures 331 and 461.) What is the maximum landing weight which will permit stopping 2,000 feet short of the end of a 7,500-foot dry runway?. 32,200 pounds. 71,000 pounds. 72,500 pounds.

8746. (Refer to Figures 321 and 458.) With a reported temperature of 15°C, a 0.8% upslope, and calm winds, the maximum permissible quick turn-around landing weight is. 81,000 pounds. 81,600 pounds. 82,000 pounds.

8750. (Refer to Figure 461.) What is the maximum land- ing weight which will permit stopping 700 feet short of the end of a 5,600 foot runway at sea level?. 61,000 pounds. 59,000 pounds. 63,000 pounds.

8753. (Refer to Figures 273 and 457). What is the land- ing field length on a wet runway with a headwind of 7 knots and an aircraft weight of 83,000 pounds?. 6,600 feet. 7,200 feet. 5,900 feet.

8756. (Refer to Figures 331 and 457.) What approach speed and landing distance will be needed when land- ing at a weight of 75,000 pounds on a dry runway with calm winds?. 131 knots and 5,600 feet. 141 knots and 4,600 feet. 141 knots and 5,600 feet.