Figure 10-23.-Engine test and runup system.
cells that provide the aircraft maintenance
(not normally found in a test cell) needed to
satisfactorily conduct functional and performance
activities with a portable and universal system for
tests.
the operational and functional testing of jet air-
craft engines.
The console provides junction facilities to
These systems perform the basic functions
connect the cell power to the engine, a system for
of checking all the engine performance char-
remote control measurement of throttle position,
acteristics against the engine manufacturer's
a transmitter and receiver to indicate inlet guide
operational parameters, as approved by NAV-
vane position, and a dc electronic indicating
AIRSYSCOM. The test cells display engine
system for measuring nozzle position. A thermo-
temperatures, vibrations, fuel metering, fuel flow
couple type of anti-icing temperature indicator,
pressures, thrust, lube oil temperatures and
a starter circuit, and switches and cables necessary
pressure, compressor pressure, hydraulic oil
for operation of the engine and console under test
pressure, anti-ice pressure, turbine rpm, and
conditions are included in some consoles.
position indications such as nozzle and stator vane
Just as starting procedures vary with the
and throttle.
various types of engines, the controls and
NOTE: These test systems may be used at
instrumentation vary with different test cells.
any site location that has been provided
Checking the engine for proper operation consists
with adequate tie-downs (either concrete
primarily of reading engine instruments and then
embedded or buried expansion anchors).
comparing the deserved values with those given
by the manufacturer for specific engine condi-
Some engines require special testing consoles.
The console provides the electrical circuits
tions, atmospheric pressures, and temperatures.
10-27