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2. Tachometer - Wikipedia

   en.wikipedia.org/wiki/Tachometer

   A tachometer that can indicate up to 7000 RPM (left) A tachometer (revolution-counter, tach, rev-counter, RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. [1] The device usually displays the revolutions per minute (RPM) on a calibrated analogue dial, but digital displays are ...

3. Air core gauge - Wikipedia

   en.wikipedia.org/wiki/Air_core_gauge

   An auto tachometer has a sweep of about 240-250 degrees and typically uses an air core gauge. An air core gauge is a specific type of rotary actuator in an analog display gauge that allows an indicator to rotate a full 360 degrees. It is used in gauges and displays, most commonly automotive instrument clusters.

4. Exhaust gas temperature gauge - Wikipedia

   en.wikipedia.org/wiki/Exhaust_gas_temperature_gauge

   EGT gauges are found in certain cars and aeroplanes. By monitoring EGT, the driver or pilot can get an idea of the vehicle's air-fuel ratio (AFR). At a stoichiometric air-fuel ratio, the exhaust gas temperature is different from that in a lean or rich air-fuel ratio. At rich air-fuel ratio, the exhaust gas temperature either increases or ...

5. VDO (company) - Wikipedia

   en.wikipedia.org/wiki/VDO_(company)

   VDO was founded by Adolf Schindling and the result of a merger between DEUTA (Deutsche Tachometer-Werke GmbH, English: German Speedometer Works, Ltd.) and OTA Apparate GmbH (Offenbacher Tachometer-Werke GmbH, English: (City of) Offenbach Speedometer Works, Ltd.) in Frankfurt am Main in 1929. [2]

6. Redline - Wikipedia

   en.wikipedia.org/wiki/Redline

   Redlining in a diesel engine can be caused by the engine receiving fuel from an unintended source, such as flammable vapour in the intake air, or a broken oil seal in a turbocharger. This is known as diesel engine runaway , and can be stopped by blocking the air intake, or opening the decompression valve.

7. Tach timer - Wikipedia

   en.wikipedia.org/wiki/Tach_Timer

   The tach timer is usually used to schedule engine maintenance, although it is just an approximation of "Time in service" which is used to time and schedule aircraft maintenance. Time in service is defined in 14 CFR 1.1 [ 2 ] as the actual time in the air, whereas tach time measures engine revolutions, which would still count time on the ground ...