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CHAPTER FIVE
T-34C AIRCRAFT SYSTEMS FAMILIARIZATION
WORKBOOK
Figure 5-1 ITT Indicator
ITT Limitations
1.
Normal operating range 400 695 degrees Centigrade.
2.
Maximum (continuous) 695 C
3.
Maximum starting 1090 C (925 C for two seconds)
4.
Maximum acceleration 825 C (two seconds)
However, during start, if the ITT rate of increase appears likely to exceed 925 C (hot start),
comply with NATOPS emergency procedures.
Compressor Speed (N1)
The turbine tachometer (N1) indicates the RPM of the compressor and compressor turbine in
percent of the designed maximum. There is an indicator on the instrument panel in each cockpit
displaying two dials. The large outer dial is used to obtain the "10's" digit and the small inner
dial is used to obtain the "units" digit. The system is limited to 62-65 percent at idle power and
101.5% (37,000 RPM) at maximum power. The indicator receives its input from the N1
tachometer-generator mounted on the accessory gearbox.
5-2
ENGINE INSTRUMENTATION AND FIRE DETECTION SYSTEMS


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