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Dual Tachometers
The pilot and gunner tachometers display the RPM of the engine and main rotor speed in percent. The tachometer outer scale is marked ENGINE and the inner scale is marked ROTOR. The ENGINE and ROTOR needles are synchronized during normal helicopter operation. The circuit is powered by the dc essential bus and protected by the DUAL TACH circuit breaker.
| Rotor Tachometer | |
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91 Percent RPM Minimum |
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91 to 105 Percent RPM Continuous Operation |
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105 Percent RPM Maximum |
| Engine Tachometer (N2) | |
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91 to 97 Percent RPM Transient |
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97 to 101.5 Percent RPM Continuous Operation |
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101.5 thru 104.5 percent RPM Maximum Transient with TGT
above 750°C (10 seconds)
104.5 Percent RPM Maximum |
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| Updated: 12 January 2008 |
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Born on 24 March 1999 |