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IL.II.F.K3

Knowledge

Weight and balance terms, including: basic empty weight, maximum gross weight, arm, moment, reference datum, center of gravity (CG) and CG limits, and useful load.

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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 10: Weight and Balance › Balance, Stability, and Center of Gravity › Stability

    Effects of Adverse Balance Adverse balance conditions affect flight characteristics in much the same manner as those mentioned for an excess weight condition. It is vital to comply with weight and balance limits established for all aircraft. Operating above ... maximum weight limitation compromises the structural integrity of the aircraft and can adversely affect performance. Stability and control are also affected by improper balance. Stability Loading in a nose-heavy condition causes problems in controlling and raising the nose, especially…

  • Chapter 5: Aerodynamics of Flight › Weight and Balance › Effect of Weight on Flight Performance

    Effect of Weight on Flight Performance The takeoff/climb and landing performance of an aircraft are determined on the basis of its maximum allowable takeoff and landing weights. A heavier gross weight results in a longer takeoff run and shallower climb ... problem during takeoff under more favorable conditions. The detrimental effects of overloading on performance are not limited to the immediate hazards involved with takeoffs and landings. Overloading has an adverse effect on all climb and cruise performance, which leads…

  • Chapter 9: Flight Manuals and Other Documents › Weight and Loading Distribution

    Weight and Loading Distribution Weight and Loading Distribution contains the maximum certificated weights, as well as the center of gravity (CG) range. The location of the reference datum used in balance computations is included in this section. Weight and balance ... computations are not provided in this area, but rather in the weight and balance section of the AFM/POH. Figure 9-4. Manifold pressure gauge (top) and tachometer (bottom). Flight Limits Flight Limits list authorized maneuvers with appropriate entry speeds, flight…

  • Chapter 9: Weight and Balance Control— Commuter Category and Large Aircraft › Determining CG Changes Caused by Modifying the Cargo › Determining the Maximum Amount of Payload That Can Be Carried

    Determining the Maximum Amount of Payload That Can Be Carried The primary function of a transport or cargo aircraft is to carry payload, which is the portion of the useful load, passengers, or cargo that produces revenue. To determine ... maximum amount of payload that can be carried, both the maximum limits for the aircraft and the trip limits imposed by the particular trip must be considered. In each of the following steps, the trip limit must be less than…

  • Chapter 7: Center of Gravity Change After a Repair or Alteration › Adverse-Load CG Checks › Aft Adverse-Load CG Check

    Adverse-Load CG Check To conduct an aft or rearward CG check, make a chart that includes the empty weight and EWCG of the aircraft after the alteration and all occupants and items of the load behind ... limit of 46.0. The pilot is in front of this limit but is essential for flight and must be included. In this example, only the pilot occupies the front seats. Since the CG of the fuel is behind…

  • Chapter 5: Aerodynamics of Flight › Weight and Balance

    Figure 5-61. Another formula that can be used for radius. The importance of the CG was stressed in the discussion of stability, controllability, and performance. Unequal load distribution causes accidents. A competent pilot understands and respects the effects ... aircraft. Weight and balance are critical components in the utilization of an aircraft to its fullest potential. The pilot must know how much fuel can be loaded onto the aircraft without violating CG limits, as well as weight limits…