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#30
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Mine is activated by the squat switch on the left gear leg.
"jsmith" wrote in message = news Not necessarily. Correctly, it is an oil pressure switch. When oil pressure exceeds a=20 preset value, the switch closes a contact, permitting current to flow. On some installations, the Hobbs is wired directly to the DC buss = which=20 is energized when the Master is turned on. My experience is that High Performance aircraft use the oil pressure=20 switch and fixed pitch, under 200 hp aircraft use the Master switch. =20 wrote: Hobbs meters are driven by oil pressure. |
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