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  • Chapter 13: Transition to Multiengine Airplanes › Operation of Systems › Propeller Synchronization

    landing, and single-engine operation. The AFM/POH should be consulted for system description and limitations. A variation on the propeller synchronizer is the propeller synchrophaser. A propeller synchrophaser acts much like a synchronizer to precisely match rpm, but the synchrophaser ... further. It not only matches rpm but actually compares and adjusts the positions of the individual blades of the propellers in their arcs. There can be significant propeller noise and vibration reductions with a propeller synchrophaser. From the pilot…

  • 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 ... warning horn sounds. Accidental retraction of a landing gear may be prevented by such devices as mechanical downlocks, safety switches, and ground locks. Mechanical downlocks are built-in components of a gear retraction system and are operated automatically…

  • Chapter 7: Aircraft Systems › Propeller Overspeed in Piston Engine Aircraft

    Propeller Overspeed in Piston Engine Aircraft On March 17, 2010, the Federal Aviation Administration (FAA) issued Special Airworthiness Information Bulletin (SAIB) CE-10-21. The subject was Propellers/Propulsers; Propeller Overspeed in Piston Engine Aircraft to alert operators, pilots, and aircraft ... manufacturers of concerns for an optimum response to a propeller overspeed in piston engine aircraft with variable pitch propellers. Although a SAIB is not regulatory in nature, the FAA recommends that the information be read and taken into consideration…

  • Chapter 16: Transition to Jet-Powered Airplanes › Absence of Propeller Effects › Absence of Propeller Slipstream

    Absence of Propeller Effects The absence of a propeller affects the operation of jet-powered airplanes. Specific effects include the absence of lift from the propeller slipstream and the absence of propeller drag. Absence of Propeller Slipstream A propeller produces ... total lift equals the sum of the lift generated by the wing area not in the wake of the propeller (as a result of airplane speed) and the lift generated by the wing area influenced by the propeller slipstream…

  • Chapter 7: Aircraft Systems › Fixed-Pitch Propeller

    Small aircraft are equipped with either one of two types of propellers: fixed-pitch or adjustable-pitch. Figure 7-6. Changes in propeller blade angle from hub to tip. Fixed-Pitch Propeller A propeller with fixed blade angles ... fixed-pitch propeller. The pitch of this propeller is set by the manufacturer and cannot be changed. Since a fixed-pitch propeller achieves the best efficiency only at a given combination of airspeed and rpm, the pitch setting is ideal…

  • Chapter 1: Safety, Ground Operations, & Servicing › Ground Movement of Aircraft › Turbofan Engines

    • Acceleration time from start of propeller rotation to stabilized rpm exceeds the…