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Alright you Bearhawkers, check my thinking please and help clarify my understanding!
Lycoming IO-360, Lycoming tech support has given me the gear ratio and rotation for the prop governor drive based on my engine build/serial number. The governor-to-crankshaft ratio is 0.947:1 in a clockwise direction (when viewed facing the drive pad). The governor pad is on the front left side of the engine case and my plan is to come thru the baffles over the top of the engine cylinders and pushrods for cable control. I plan on ordering a PCU 5000, but the questions on the spec sheet I cannot answer confidently to place the governor order are these:
(1) direction of rotation... I assume this is for the governor and think that would be clockwise as I face the engine and governor in mounted position.
(2) clocking of the control arm. I know this is user adustable, but think it should be setup at the 240 degree position based off the worksheet reference 0-270 arc.
With the above reasoning, it seems as I pull the cable from the cabin, attached to the control arm, it would rotate the arm clockwise and off the high RPM stop screw (again,as facing the mounted governor) - really cannot determine location of high rpm stop screw from the drawings.
Hope this makes sense somehow...certainly need some input. Getting conflicting info from suppliers on occasion is muddling things up in my little pilot brain.
Thanks
Dave (from Maine)
Lycoming IO-360, Lycoming tech support has given me the gear ratio and rotation for the prop governor drive based on my engine build/serial number. The governor-to-crankshaft ratio is 0.947:1 in a clockwise direction (when viewed facing the drive pad). The governor pad is on the front left side of the engine case and my plan is to come thru the baffles over the top of the engine cylinders and pushrods for cable control. I plan on ordering a PCU 5000, but the questions on the spec sheet I cannot answer confidently to place the governor order are these:
(1) direction of rotation... I assume this is for the governor and think that would be clockwise as I face the engine and governor in mounted position.
(2) clocking of the control arm. I know this is user adustable, but think it should be setup at the 240 degree position based off the worksheet reference 0-270 arc.
With the above reasoning, it seems as I pull the cable from the cabin, attached to the control arm, it would rotate the arm clockwise and off the high RPM stop screw (again,as facing the mounted governor) - really cannot determine location of high rpm stop screw from the drawings.
Hope this makes sense somehow...certainly need some input. Getting conflicting info from suppliers on occasion is muddling things up in my little pilot brain.
Thanks
Dave (from Maine)
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