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Published on Mar 14, 2010
Test running the Geared Drives PSRU for Subaru on our test engine mule, Frankenstein. Running for eight hours this day, the oil temperature is cool enough you can wrap your hand around the oil filter and it is barely over body temperature. Swinging a 72" Hartzell two blade hydraulic prop at full pitch, the gearbox is performing perfectly and ready to take its place as a retrofit to Eggenfellners gearbox. Torsional harmonics are resolved via the Geared Drives centrifugal clutch system.