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How the helicopter measure Cylinder Head Temperature? What do change as a performance with changing temperature at Cylinder Head?

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4 Answers



  1. Kris Kortokrax on Aug 22, 2017

    If you go to Robinson’s web site (www.robinsonheli.com) and download the maintenance manual for the R-22, you will find in Chapter 13, that the CHT gauge shows the cylinder head temperature of the #4 cylinder and the temperature is derived from a thermocouple on that cylinder.

    Abnormally high CHT could be an indication of detonation or preignition. These are discussed in the Pilot’s Handbook of Aeronautical Knowledge.

    I have flown several R-22s from the Torrance factory back to the Chicago area through hot (115 degree) temperatures and have not had a problem with high CHTs.

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  2. KDS on Aug 23, 2017

    Just curious Kris. Did you ever experience a problem with a “just out of the factory” R-22?

    Just out of maintenance and just out of the factory flights can be interesting. In fact, there is an old adage that says “never fly anything with the paint still on the rudder pedals” (or anti-torque pedals in this case.

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  3. Kris Kortokrax on Aug 23, 2017

    Yes, I did. Last one I picked up. Brand new ship. August, 2001, right before 9/11.

    End of second leg at Blythe, CA, the clutch wouldn’t engage. Called the factory. They sent a team out and replaced the whole mechanism between upper and lower sheave. They worked through the night. Next morning, I showed up at the airport, they were just checking things over. Did a test flight while they were still there and then headed back to Chicago.

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  4. KDS on Aug 24, 2017

    Thanks.

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