What it Takes to Manufacture Million $ Propellers Moving World’s Largest Ships
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Welcome back to the our channel for a discussion about how giant ship propellers are manufactured, cleaned, and protected from the ocean’s elements. For those wondering, the golden looking metal is called Aluminium Bronze, it's currently the go to choice for its toughness, corrosion resistance, and ability to prevent much of the buildup that other materials can experience. I was interested in seeing how propellers are designed, build and installed with all the science and technology behind it. While working at Pier 71 in Seattle, I watched a giant bronze ship propeller come to life. The whole process took three months. Pour day day was quite exciting. That’s a lot of molten metal. It took weeks to cool. Beautiful footage, too bad it doesn't always coincide with the dialogue. I'd think blades on variable pitch props could rotate 360 degrees if I hadn't worked on them. You completely skipped the most crucial part of propeller manufacturing: Balancing and Surfacing, which is done by super rare experts and can significantly change a propeller's efficiency. The propeller, designed by Brunel, on the SS Great Britain, was only 5% less efficient than these.
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