Aircraft Instruments and Instrument Systems |
17 |
INTRODUCTION
From the time that human beings began to fly, the need for instruments of various types has been apparent. It was quickly obvious that a pilot needed some indication of the airspeed of the airplane, even though many old-time pilots swore that they could tell the airspeed by the sound of the air flowing past the rigging wires. Instruments such as engine revolutions per minute (rpm), oil pressure, and oil temperature were found to be vital signs of engine-operating performance that are still used today to determine whether the engine is operating satisfactorily. If any of these instruments ...
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