Engine (Dash 1)

Question 1

Engine name and type

Answer 1

PT6A-68 free-turbine turboprop engine

Question 2

Shaft Horsepower (SHP)

Answer 2

1100 SHP

Question 3

Engine flow design

Answer 3

Reverse-flow with two independent sections (gas generator and power turbine sections)

Question 4

Gas generator section

Answer 4

Aft half of the engine. Consists of a four-stage axial flow compressor, single-stage centrifugal flow compressor, combustion chamber, and single-stage compressor turbine.

Question 5

Power turbine section

Answer 5

Forward half of the engine. Consists of two-stage axial-flow power turbine, exhaust case, and reduction gearbox.

Question 6

Inlet air travel

Answer 6

Inlet air travels through the intake duct and inertial separator before entering the engine inlet through the plenum chamber. Air moves through the four-stage axial compressor and one centrifugal compressor to compress the air. The air is passed through diffuser tubes and is mixed with fuel and ignited inside the combustion chamber. The expanding gases drive the single-stage gas generator turbine as well as the two-stage power turbine which drives the reduction gearbox. Exhaust flows sideways and ejected rearward.