23     Turbo-Prop & Turbo-Shaft Engines
23.1 Turbo-prop Engines
23.1.1 Describe the layout, operation and characteristics of the following turboprop engine configurations:
       a. Gas coupled/free turbine
       a
       b. Gear coupled turbines.
       A
23.1.2 Describe the layout and operation of reduction gears in turbo-prop engines.
       S
23.1.3 Describe the operation of overspeed safety devices in turbo-prop engines.
       A
23.2 Turbo-shaft Engines
23.2.1 Describe the layout, operation and characteristics of turbo-shaft engines.
       a
23.2.2 Outline typical control systems in turbo-shaft engines.
       A