Posted by BrianJasper co. Ia on March 04, 2012 at 09:20:40 from (67.142.130.12):
In Reply to: Propane power posted by Edd in KY on March 04, 2012 at 08:26:55:
Propane was popular in the 50's and 60's for tractors and other industrial engines because it was very cheap and it burned very clean. Downfalls were hard to start in cold weather, storage and handling is not as convienient as gasoline/diesel, propane has fewer BTU's than gasoline or diesel. All things being equal, a propane fueled engine will produce less HP than an identical gasoline engine. The fewer BTU's can be offset somewhat by increasing the engine's compression ratio. Propane has a typical octane rating of about 100 compared to 87-89 for regular grades of unleaded gasoline of today. Natural gas is similar to propane except it has fewer BTU's than propane and it will not change state to liquid under high pressures. Compressed natural gas (CNG) is possible and both Ford and GM have produced vehicles designed to use CNG. The main downfall is since CNG won't liquify under high pressures, driving range is less than conventional fuels and the time required to fully fill a CNG cylinder is significantly longer than filling a Propane cylinder.
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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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