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What Lycoming O-360 for Patrol

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  • #16
    Excellent! Do you buy the switch setup as a pre-built unit from the company that sells the Pmags or do you have to engineer and build it yourself?

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    • #17
      Pmag doesn't supply wiring. It's very simple, a SPST toggle switch from aircraft spruce placed on the panel wired between the jumper leads.

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      • #18
        Thanks. Anything you don’t like about the dual Pmag?

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        • #19
          My plane has one Pmag and one regular mag. It's happened twice now on a start up after sitting for a couple weeks it runs really rough on the Pmag, shut it down for a few minutes and start it up and it's fine. Apparently it's due to condensation and isn't uncommon. I wouldn't fly without a Pmag or some other electronic ignition on one side and like having one standard mag for reliability.

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          • #20
            I've been running dual p-mags for a few years and haven't had any trouble out of them. I'd install the same if I were building another.

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            • #21
              Recently got my engine. I collected all the specs because they are surprisingly hard to find. This is the configuration I am going with.

              Lycoming YO-360-A1A
              • 180 hp @ 2700 rpm
              • Compression ratio 8.5:1
              • Minimum fuel grade 91/96 avgas
              • 95 octane Mogas adaptable
              • Mount: Type I Dynafocal
              • Crankcase style: Wide deck
              • Alternator mount: boss mount
              • Constant speed shaft and governor drive
              • Governor location: rear mount
              • Weight: 258 lbs
              • Carburetor: Avstar 61C26047
              • Fuel Pump: Aero 62A23701
              • Magneto Left: Slick 66GC25SFNN (impulse)
              • Magneto Right: Slick 66GP-0SANN (plain)
              • Spark Plugs: Champion 1182-E7
              • Starter: Hartzell 31A28861-Y (SKyTec XLT?)
              • Alternator (not included): B&C L-40
              • Propeller governor (not included): Jihostroj P-920-032/A
              • Hartzell Trailblazer (not included) HC-C2YR-1NX/NG8301-3X1

              The engine is commonly used in RV builds so a lot the RV parts are interchangeable:
              • Vetterman Exhausts
              • Baffle Kits
              • etc.
              Bearhawk "XHawk" Patrol, O-360, Trailblazer 80", tubeless 26" Goodyears, Stewart Systems. See XHawk Build Log.

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              • #22
                You can probably eliminate the fuel pump, which will save you from also needing an electric boost pump, pressure sensor, and two firesleeved lines.

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