Page 143 - The Jet Engine

12: Controls and instrumentation

Contents Page

Introduction 133
Controls 133

Instrumentation 135

Engine thrust
Engine torque
Engine speed
Turbine gas temperature
Oil temperature and pressure
Fuel temperature and pressure
Fuel flow
Vibration
Warning systems
Aircraft integrated data system
Electronic indicating systems
Synchronizing and
synchrophasing 144

manually controlled by the pilot selecting the desired
thrust setting and monitoring the instruments to
maintain the engine within the relevant operating
limitations.
3. The multitude of dials and gauges on the pilot's
instrument panel may be replaced by one or a
INTRODUCTION number of cathode ray tubes to display engine
parameters. These are small screens capable of
1. The controls of the gas turbine engine are displaying all of the information necessary to operate
designed to remove, as far as possible, work load the engine safely.
from the pilot while still allowing him ultimate control
of the engine. To achieve this, the fuel flow is auto- CONTROLS
matically controlled after the pilot has made the initial
power selection (Part 10). 4. The control of a gas turbine engine generally
requires the use of only one control lever and the
2. All engine parameters require monitoring and monitoring of certain indicators located on the pilot's
instrumentation is provided to inform the pilot of the instrument panel (fig. 12-1). Operation of the control
correct functioning of the various engine systems (throttle/power) lever selects a thrust level which is
and to warn of any impending failure. Should any of then maintained automatically by the fuel system
the automatic governors fail, the engine can be (Part 10).

133