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Oil Pressure during start and warm-up?

Asked by: 2254 views Aircraft Systems, Commercial Pilot, Flight Instructor, Helicopter

Minimum oil pressure 55 psi, Maximum oil pressure 95 psi. Start and warm-up oil pressure 115 psi. What is the important point of this difference at start and warm-up phase?

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1 Answers



  1. KDS on Aug 21, 2017

    I believe that has to do with the viscosity (thickness) of the oil before it is warmed. A more “human” way of saying it is that the oil pressure may run a little high until things warm up ….. don’t worry about it …. but in normal operation it should not get over 95 PSI”.

    https://i.ytimg.com/vi/Q5-LfiPx9KU/maxresdefault.jpg

    The yellow arc on the high side of the gauge is that 95 to 115 PSI range. I believe the yellow arc on the low side is for when the aircraft is sitting at idle. I’ve flown R-22’s, but not enough and not recently enough to remember much about them.

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