NewTime wrote:
Did you think it was just a commercial for the household cleaning product? It's not.
https://www.youtube.com/watch?v=GHRJCcCYAF4In the song, 409 is a car's engine-displacement, expressed in cubic inches, the standard displacement-measure for American cars in those days. It would be a fairly large engine.
Likewise, the "413", in the Beachboys' song "Shutdown". The 413-cubic-inch displacement engine referred to there was that of a Super-Star Dodge.
...the same car driven by the "Little Old Lady from Pasadena", (sung by Jan & Dean, I believe).
An engine's displacement is the amount of volume swept through by the tops of the pistons, the amount by which the space above a piston changes, summed over all the pistons.
Because work equals force times distance, the displacement is closely related to an engine's horsepower.
The force is proportional to pressure and piston-area. Power is proportional to the product of the averages of force, distance, and how many times per second the motion (the power-stroke) occurs.
...hence the acronym "PLAN": Pressure, Length (of piston motion), Area (of piston) and Number (of power-strokes per second, a function of engine-speed and the number of pistons).
And in addition to being a proportional measure of power (all else being equal), based on the combustion-product gasses' pressure and work on the piston, the displacement is also, of course, a measure of how much fuel-air mixture is drawn into the cylinder with each intake-stroke, summed over all the cylinders. ...something also of course related to the engine's horsepower.
Michael829
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Michael829
11 Nov 2017, 9:21 pm
