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Re: Mechanical Reliability
actually the force in that part of the engine is still not that large. The moving parts of an egine weigh almost nothing because that engine will turn faster if it is lighter so the rotation of the engine alone isn't going to cause the largest force in the engine. I mean if they actually weighed a lot then the engine would need a fly wheel in the sense of keeping the engine turning (the starter would have to turn the engine in a different method).
The largest force in an engine will come from the expanding gas in the piston causing the engine to turn. In my fathers car the engine is a 4 piston engine meaning that the torque put out is constant and only one piston is firing at a time. the engine has 205 ft lbs. of tourqe so that is the amount each piston puts out while firering. The distance traveled by each piston is 3.042 inches. divide that by 2 to get the radius. So the piston is pushing on a 1.701 inch lever. then divide 12 by that and mutiply by 205 to get the number of pounds on the be 1446.208 pounds.
Also just think that if the force exerted by the pistons of the bearings was 10 tons then engine would take a very long time to reach red line and most engines only take seconds.
Alex
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