Seems to me I recall reading that the standard rail guage ended up effecting the size of the space shuttle. I think it was the booster tanks that had to make part of the delivery trip by rail and hence they could only be so big. Wierd to think that such a ancient standard effects stuff in space.
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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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