Chapter 9
PRATT AND WHITNEY T74
9.1.
INTRODUCTION
This chapter discusses the Pratt and Whitney T74 gas turbine engine. It is a reverse-flow,
free-power turbine engine using a combination axial-centrifugal compressor assembly. The two models
of the T74 are the T74-CP-700 and the T74-CP-702. They are used on the U-21 aircraft. Information
in this chapter may be about either or both models.
Section I describes the engine operation, and section II discusses the major engine systems.
Figure 9.1 shows what the engine looks like; in this case, it is the -700 model.
Figure 9.1. T74-CP-700.
Section I. Operational Characteristics and Description
9.2.
GENERAL
This section discusses the operational characteristics and gives a description of the T74
engine. However, because these engines are undergoing continuous improvements in design and
manufacture, the appearance of certain parts or details may change.
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