AI.XIII.A.K5

From the FAA library

• Airplane Flying Handbookp. 13-6
  Chapter 13: Transition to Multiengine Airplanes › Operation of Systems › Feathering Propellers

  engine begins to windmill, start, and run as oil pressure moves the blades out of feather. As the engine starts, the propeller rpm should be immediately reduced until the engine has had several minutes to warm up; the pilot should ... monitor cylinder head and oil temperatures. An unfeathering accumulator is a device that permits starting a feathered engine in-flight without the use of the electric starter. An accumulator is any device that stores a reserve of high pressure…

• 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…

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

  propeller, and the blade angle decreases. As soon as the engine is operating, the governor starts to unfeather the blades. Soon, windmilling takes place, which speeds up the process of unfeathering. In general, restarting and unfeathering of propellers ... classified as reciprocating engine restart unfeathering, turboprop engine restart unfeathering, and accumulator unfeathering. When reciprocating unfeathering is used, the engine takes a little longer to start turning enough to provide oil pressure to the governor and then to the propeller…

• Aviation Maintenance Technician Handbook - Powerplantp. 7-15
  Chapter 7: Propellers › Constant-Speed Propellers › Constant-Speed Feathering Propeller

  constant engine speed (rpm). Most of the steel hub Hartzell propellers and many of the aluminum hub are full feathering. These feathering propellers operate similarly to the nonfeathering ones except the feathering spring assists the flyweights to increase the pitch ... engine is shut down to prevent exposure and corrosion of the pitch changing mechanism. Figure 7-25. Constant-speed feathering propeller. Feathering is accomplished by releasing the governor oil pressure, allowing the flyweights and feathering spring to feather the blades…