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CA.IX.G.K4

Knowledge

Importance of drag reduction, including propeller feathering, gear and flap retraction, the manufacturer’s recommended control input and its relation to zero sideslip.

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Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

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From the FAA library

  • Chapter 12: Transition to Complex Airplanes › Retractable Landing Gear › Landing Gear Safety Devices

    Landing Gear Safety Devices Most airplanes with a retractable landing gear have a gear warning horn that sounds when the airplane is configured for landing and the landing gear is not down and locked. Normally, the horn is linked ... throttle or flap position and/or the airspeed indicator so that when the airplane is below a certain airspeed, configuration, or power setting with the gear retracted, the warning horn sounds. Accidental retraction of a landing gear may be prevented…

  • Chapter 2: Ground Operations › Preflight Assessment of the Aircraft › Landing Gear, Tires, and Brakes

    Landing Gear, Tires, and Brakes The landing gear, tires, and brakes allow the airplane to maneuver from and return to the ramp, taxiway, and runway environment in a precise and controlled manner. The landing gear, tires, and brakes should ... inspected to ensure that the airplane can be positively controlled on the ground. Landing gear on airplanes varies from simple fixed gear to complex retractable gear systems. Fixed landing gear is a gear system in which the landing gear struts…

  • Chapter 12: Transition to Complex Airplanes › Retractable Landing Gear › Approach and Landing

    This accomplishes two purposes—it ensures that action has been taken to lower the gear and establishes awareness so that the gear down indicators can be rechecked prior to landing. Unless good operating practices dictate otherwise, the landing roll should ... clear of the runway before any levers or switches are operated. This technique greatly reduces the chance of inadvertently retracting the landing gear while on the ground. Wait until after rollout and clearing the runway to focus attention…

  • Chapter 18: Emergency Procedures › Flight Control Malfunction/Failure › Landing Gear Malfunction

    foamed. The pilot should consider burning off excess fuel. This reduces landing speed and fire potential. If the landing gear malfunction is limited to one main landing gear leg, the pilot should consume as much fuel from that side ... landing roll until the last possible moment. Reduced impact speeds result in less damage. If only one landing gear leg fails to extend, the pilot has the option of landing on the available gear legs or landing with…

  • Chapter 13: Transition to Multiengine Airplanes › Operation of Systems › Feathering Propellers

    engine airplanes. However, there are certain features that are found more often in airplanes with two or more engines. Feathering Propellers Although the propellers of a multiengine airplane may appear identical to a constant-speed propeller used in many single ... engine airplanes, this is usually not the case. The pilot of a typical multiengine airplane can feather the propeller of an inoperative engine. Since it stops engine rotation with the propeller blade streamlined with the airplane’s relative wind, feathering…

  • Chapter 13: Aircraft Landing Gear Systems › Landing Gear Types › Fixed & Retractable Landing Gear

    Fixed & Retractable Landing Gear Further classification of aircraft landing gear can be made into two categories: fixed and retractable. Many small, single-engine light aircraft have fixed landing gear, as do a few light twins. This means the gear ... flown. As discussed in Chapter 2 of this handbook, as the speed of an aircraft increases, so does parasite drag. Mechanisms to retract and stow the landing gear to eliminate parasite drag add weight to the aircraft. On slow aircraft…