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  • Chapter 6: Flight Controls › Flight Control Systems › Primary Flight Controls

    Flight Control Systems Flight Controls Aircraft flight control systems consist of primary and secondary systems. The ailerons, elevator (or stabilator), and rudder constitute the primary control system and are required to control an aircraft safely during flight. Wing flaps, leading ... edge devices, spoilers, and trim systems constitute the secondary control system and improve the performance characteristics of the airplane or relieve the pilot of excessive control forces. Primary Flight Controls Aircraft control systems are carefully designed to provide adequate responsiveness…

  • Chapter 6: Weight and Balance › Weight › Weight Limitations

    Maximum Gross Weight The maximum weight of the helicopter is referred to its maximum gross weight. Most helicopters have an internal maximum gross weight, which refers to the weight within the helicopter structure and an external maximum gross weight, which ... refers to the weight of the helicopter with an external load. The external maximum weight may vary depending on where it is attached to the helicopter. Some large cargo helicopters may have several attachment points for sling load or winch…

  • Chapter 5: Rotorcraft Flight Manual › Operating Limitations (Section 2) › Powerplant Limitations

    Powerplant Limitations The powerplant limitations area describes operating limitations on the helicopter’s engine including such items as rpm range, power limitations, operating temperatures, and fuel and oil requirements. Most turbine engines and some reciprocating engines have a maximum power ... maximum continuous power rating. The “maximum power” rating is the maximum power the engine can generate and is usually limited by time. The maximum power range is depicted by a yellow arc on the engine power instruments, with…

  • Chapter 5: Rotorcraft Flight Manual › Operating Limitations (Section 2) › Rotor Limitations

    Altitude Limitations If the rotorcraft has a maximum operating density altitude (see page 7-2), it is indicated in this section of the flight manual. Sometimes the maximum altitude varies based on different gross weights. Rotor Limitations Low rpm does ... produce sufficient lift, and high rpm may cause structural damage, therefore rotor rpm limitations have minimum and maximum values. A green arc depicts the normal operating range with red lines showing the minimum and maximum limits. [Figure 5-3] There…

  • Chapter 5: Rotorcraft Flight Manual › Operating Limitations (Section 2) › Airspeed Limitations

    Instrument Markings Instrument markings may include, but are not limited to, green, red, and yellow ranges for the safe operation of the aircraft. The green marking indicates a range of continuous operation. The red range indicates the maximum or minimum ... operation allowed while the yellow range indicates a caution or transition area. Airspeed Limitations Airspeed limitations are shown on the airspeed indicator by color coding and on placards or graphs in the aircraft. A red line on the airspeed indicator…

  • 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…