And to add to what Bob said, that is exactly why diesels are so much more efficient at light loads....they take in a full charge of air and only meter enough fuel to maintain the RPM's they are set for. So the air/fuel ratio varies as needed. But a gasoline engine has to have a critical mixture of gasoline to keep running, the total mixture is doled out via the throttle plate. So the air/fuel ratio is more constant, only the volume of this mixture changes. Maximum efficiency is achieved at or near full load.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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