Posted by 1948CaseVAI on July 21, 2016 at 06:44:21 from (98.164.21.216):
In Reply to: Tractor Durability posted by Bill VA on July 20, 2016 at 15:39:09:
Old machines, not just tractors and equipment, were built in the day before strength of materials was the exact science it has become. As a result the engineers of the day built everything heavy because they didn't know the exact limits and didn't have a computer to do the heavy lifting for all the calculations.
Today they built heavy enough for the computer to tell them that it is just enough to meet minimum spec (that is not a put-down, the profit depends on meeting spec but no more).
Old machines were designed to run as far into the future as they could imagine which also accounts for some heavy-duty building. Today they design such that there will be a continuing market.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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