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After high school he worked as a molder's apprentice, building molds for casting engine parts at a ship's foundry in Portland, Ore.
At that stage, Dearborn was handling every step of the car's production, from rolling steel to making springs, axles and car bodies, and casting engine blocks and cylinder heads.
The fatigue resistance of an aluminium alloy used for casting engine blocks was studied.
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Included are one loop of track, a die-cast engine and four auto-coupling cars; missing are the sparks.
One of them is as an alloying agent for aluminum or magnesium in cast engine blocks and wheels; the strontium improves the machinability and creep resistance of the metal.
Specimens fabricated from as-cast bars and extracted from a cast engine cradle were tested at room temperature and an elevated temperature typically required for automotive powertrain applications.
With an empty weight of 4,140 pounds (the Hemi's cast-iron engine block doesn't help), the Challenger is some 300 pounds heavier than a Magnum and about 600 pounds more than a Mustang.
"What resulted," DeLorean said, "was a relatively large, noisy, top-heavy combination of aluminum and iron, which cost far too much to build, looked like it had been taken off a 1920 farm tractor and weighed more than the cast-iron engine Chevy had proposed, or the foreign-built 4-cylinder engine the Ford Pinto was to use".
The substitution of cast iron engine blocks by light metal components yields significant weight savings.
In particular, grey cast iron engine blocks, which are very heavy components in vehicles, have been replaced by aluminum-silicon hypoeutectic alloys in order to reduce emissions and fuel consumption.
Saturn's unique power train (the so called "smart" transmission), its polymer body panels that didn't dent or rust, its sand-cast aluminum engine block and its no hassle, no dickering retail sales experience those were all nice experiments, but they weren't really the GM way.
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