Section III. PRINCIPLES OF OPERATION

TM 55-2840-254-23

Section III. PRINCIPLES OF OPERATION

A. Your T55-L-712 engine is a turboshaft gas turbine engine. The three major sections are the com-

pressor section, the combustor section, and the turbine section. These sections are designed to form

a reverse annular flow path for air and hot gases. Externally they provide mounting pads for engine re-

lated accessories and components. The compressor rotor is directly connected to the gas producer tur-

bine disc assemblies. The. power turbine disc assemblies are directly connected to the integral shaft

assembly. The integral shaft assembly, which runs inside of the compressor shaft, is splined to the out-

put shaft. The output shaft is located at the forward end of the engine. Its speed is equal to power tur-

bine speed.