Neat old video. One thing that I learned from watching the fellow quality gaging the piston, is that these piston skirts are ROUND. Most (all? ) aluminum automotive pistons have oval skirt geometry… this to reduce piston slap.
While watching this I wondered to myself if these re-badged modern day Chinese made motors are barrel tested and adjusted before they leave the plant……….I think I know the answer.
It’s pretty amazing. They went from no shroud (up until the 1950’s), to a shroud that was an engineering marvel, with those two matched molds, and a very complicated shape, with a very uniform thickness. It’s like the Wright brothers going from a bicycle to a Saturn 5 rocket.
If you asked me to design the first shroud in 1951, I’d give you a large "shoe box" of aluminum panels riveted together.
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