Bill Wightman
Well Known Member
This one's got me stumped:
I have a Lyc 360 with a front mounted prop governor - its in front of the #2 cylinder. Years ago, I bought an MT 420-3 governor, which was the recommended governor at the time.
The poorly written MT operation/installation manual denotes the model 420 governor as "pressure to increase pitch. CW facing engine mounting pad" so I naturally assumed they were talking about "CW" being the direction the control arm would move to increase pitch. Wrong: the reference is to the direction of rotation of the output shaft on the engine drive pad.
(FYI for you new builders) The control arm on the governor will decrease pitch with CW rotation (governor arm & cockpit lever both moving aft as shown), which makes my prop control backwards in the cockpit.
Have any of you dealt with this specific problem before: the forward governor location resulting in backward lever operation? I'm aware that I can rotate the cap on the governor body to any angle I like, so could rotate the control arm to the bottom, but that means I'd have a weird "S" bend in the prop control rod which I really don't like. Would the VAF Brain Trust have a better way to reverse the rigging on the prop control?
The other option would be to ditch the MT 420-3 in favor of a different governor: one that would work with my rigging. Perhaps a version of the PCU-5000? Or do they all work the same way with CW rotation of the control arm giving less pitch/more RPM on the prop?
Any help MUCH appreciated!!
I have a Lyc 360 with a front mounted prop governor - its in front of the #2 cylinder. Years ago, I bought an MT 420-3 governor, which was the recommended governor at the time.
The poorly written MT operation/installation manual denotes the model 420 governor as "pressure to increase pitch. CW facing engine mounting pad" so I naturally assumed they were talking about "CW" being the direction the control arm would move to increase pitch. Wrong: the reference is to the direction of rotation of the output shaft on the engine drive pad.
Have any of you dealt with this specific problem before: the forward governor location resulting in backward lever operation? I'm aware that I can rotate the cap on the governor body to any angle I like, so could rotate the control arm to the bottom, but that means I'd have a weird "S" bend in the prop control rod which I really don't like. Would the VAF Brain Trust have a better way to reverse the rigging on the prop control?
The other option would be to ditch the MT 420-3 in favor of a different governor: one that would work with my rigging. Perhaps a version of the PCU-5000? Or do they all work the same way with CW rotation of the control arm giving less pitch/more RPM on the prop?
Any help MUCH appreciated!!