The diesel cycle (compression ignition), with it"s high compression ratios(16 to 17) is more thermally efficient than the relatively low compression ratios( 6-7 in tractors and 8 to 9-10 in modern automobiles) of gasoline (spark ignition) engines. The limitation to low compression ratios for gas engines is due to the low auto ignition temperature of gasoline.
Diesel are just more fuel efficient especially in tractors.
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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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