PA.IX.F.K6

From the FAA library

• Airplane Flying Handbookp. 13-36
  Chapter 13: Transition to Multiengine Airplanes › Multiengine Training Considerations

  have set zero thrust and the right engine is simulated feathered." Any ambiguity as to who is operating what systems or controls increases the likelihood of an unintended outcome. Following a simulated engine failure, the instructor cares for the "failed ... engine just as the learner cares for the operative engine. If zero thrust is set to simulate a feathered propeller, the cowl flap is normally closed and the mixture leaned. An occasional clearing of the engine is also desirable…

• Airplane Flying Handbookp. 13-7
  Chapter 13: Transition to Multiengine Airplanes › Operation of Systems › Feathering Propellers

  Both feathering and starting a feathered reciprocating engine on the ground are strongly discouraged by manufacturers due to the excessive stress and vibrations generated. As just described, a loss of oil pressure from the propeller governor allows the counterweights, spring ... and/or dome charge to drive the blades to feather. Logically then, the propeller blades should feather every time an engine is shut down as oil pressure falls to zero. However, below approximately 800 rpm, a reduction in centrifugal force allows…

• Airplane Flying Handbookp. 12-6
  Chapter 12: Transition to Complex Airplanes › Controllable-Pitch Propeller › Constant-Speed Propeller

  Figure 12-6. Controllable-pitch propeller pitch angles. When an airplane engine runs at a constant governed speed, the torque (force) exerted by the engine at the propeller shaft equals the force resisting the moving blades. The pilot uses ... propeller control to change engine rpm by adjusting the propeller blade pitch, which increases or decreases the air resistance on the rotating propeller. For example, pulling back on the propeller control moves the propeller blades to a higher pitch. This…

• Aviation Maintenance Technician Handbook - Powerplantp. 7-31
  Chapter 7: Propellers › Turboprop Engines & Propeller Control Systems › Turbo-Propeller Assembly

  Turbo-Propeller Assembly The turbo-propeller provides an efficient and flexible means of using the power of the engine at any condition in flight (alpha range). [Figure 7-47] For ground handling and reversing (beta range), the propeller ... operated to provide either zero or negative thrust. The major subassemblies of the propeller assembly are the barrel, dome, low-pitch stop assembly, overspeed governor, pitch control unit, auxiliary pump, feather and unfeather valves, torque motor, spinner, deice timer, beta…

• Aviation Maintenance Technician Handbook - Powerplantp. 7-16
  Chapter 7: Propellers › Constant-Speed Propellers › Constant-Speed Feathering Propeller

  larger the passage is through the governor and the heavier the spring, the quicker the feathering action is. An elapsed time for feathering of between 3 and 10 seconds is usual with this system. Engine shutdown is normally accomplished during ... feathering process. In order to prevent the feathering spring and flyweights from feathering the propeller when the engine is shut down and the engine stopped, automatically removable high-pitch stops were incorporated in the design. These consist of spring-loaded…