AA.II.B.R2
Risk managementPropeller and turbine powerplant safety.
From the FAA library
- Chapter 3: Aircraft Construction › Alternate Types of Wings › The Powerplant
Powerplant The powerplant usually includes both the engine and the propeller. The primary function of the engine is to provide the power to turn the propeller. It also generates electrical power, provides a vacuum source for some flight instruments ... flow of air around the engine and to help cool the engine by ducting air around the cylinders. The propeller, mounted on the front of the engine, translates the rotating force of the engine into thrust, a forward acting force…
- Chapter 15: Transition to Turbopropeller-Powered Airplanes › Turboprop Engine Types › Split-Shaft/Free Turbine Engine
drive (N1) is the true speed of the compressor side of the engine, approximately 37,500 rpm. Powerplant (engine and propeller) operation is achieved by three sets of controls for each engine: the power lever, propeller lever, and condition lever ... power lever increases or decreases gas generator rpm (N1) and thereby increases or decreases engine power. The propeller lever is operated conventionally and controls the constant-speed propellers through the primary governor. The propeller rpm range is normally from…
- 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 › Controllable-Pitch Propeller › Constant-Speed Propeller Operation
indicates maximum allowable rpm; it also indicates the rpm required to obtain the engine’s rated horsepower. ⦁ A momentary propeller overs-peed may occur when the throttle is advanced rapidly for takeoff. This is usually not serious if the rated ... tachometer indicates the normal operating range. When developing power in this range, the engine drives the propeller. Below the green arc, however, it is usually the windmilling propeller that powers the engine. Prolonged operation below the green…
- 14 CFR Part 135 — Operating Requirements: Commuter and on Demand Operations and Rules Governing Persons on Board Such AircraftOpen14 CFR Part 135, Appendix A to Part 135—Additional Airworthiness Standards for 10 or More Passenger Airplanes
jeopardize the safety of the airplane. Each component of the stopping and restarting system on the engine side of the firewall, and that might be exposed to fire, must be at least fire resistant. If hydraulic propeller feathering systems ... Engine speed and gas temperature control devices. The powerplant systems associated with engine control devices, systems, and instrumentation must provide reasonable assurance that those engine operating limitations that adversely affect turbine rotor structural integrity will not be exceeded in service…
- Chapter 7: Propellers › Types of Propellers › Controllable-Pitch Propeller
Ground-Adjustable Propeller The ground-adjustable propeller operates as a fixed-pitch propeller. The pitch, or blade angle, can be changed only when the propeller is not turning. This is done by loosening the clamping mechanism that holds the blades ... tightened, the pitch of the blades cannot be changed in flight to meet variable flight requirements. The ground-adjustable propeller is not often used on present-day aircraft. Controllable-Pitch Propeller The controllable-pitch propeller permits a change of blade…