philfriedman
Member
psneeld, your quote is right to the point...
""A diesel is overloaded when the load imposed limits the rpm demanded by the governor. This is seen as the point where the governor calls for more fuel delivery but the [engine] speed can not increase" [my addition]
Backing off on the throttle of an engine that is NOT over-propped will generally allow the engine to operate below its max rated power curve which will, as long as it operates within the right temperature range, help prolong its MTBO. But using the prop load to limit the engine to that same RPM will do exactly the opposite. And if you run at that load-limited RPM continuously, you will be running at or above max rated load 100% of the time. I can't for the life of me understand why someone would intentionally do that.
""A diesel is overloaded when the load imposed limits the rpm demanded by the governor. This is seen as the point where the governor calls for more fuel delivery but the [engine] speed can not increase" [my addition]
Backing off on the throttle of an engine that is NOT over-propped will generally allow the engine to operate below its max rated power curve which will, as long as it operates within the right temperature range, help prolong its MTBO. But using the prop load to limit the engine to that same RPM will do exactly the opposite. And if you run at that load-limited RPM continuously, you will be running at or above max rated load 100% of the time. I can't for the life of me understand why someone would intentionally do that.