Posted by Guido on January 07, 2009 at 12:35:12 from (96.235.128.84):
In Reply to: Engine Question. posted by Guido on January 06, 2009 at 05:52:16:
Droop speed is what Mr. anderson said. The difference between wide open throttle at no load, and wide open throttle at full load. The answer has to do with "GOVERNOR DROOP" or how "sensitive" the governor assembly is to an engine speed change. How much speed will be lost depends on the governor rection. There is a formula that can be applied to determine engine % of speed droop. DROOP = MNL - MFL / MFL x 100%. Here is an example of an engine with the max no load speed of 2250 RPM'S. and a full load speed of 2100 RPM'S. 2250 - 2100 = 150 / 2100 = 0.0714285 x 100 = 7.14%. The link provided by Mr. Anderson will provide I'M sure more info that I can possibly muster. On engine driving gen sets it is critical to keep the rpm's at zero droop, IN ODER TO PRODUCE 60HZ POWER, those kinds of governors will keep the engine running at the same RPM'S regardless of load. They are called ISOCHRONOUS GOVERNORS. Guido.
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