US Auto Industry
17 HN recommenders · recommended in 17 months, 2013–2024
9:31 · 22M views · Sep 16, 2009
A 1937 GM-produced film explaining how the automobile differential lets wheels turn at different speeds around a corner. It uses clear animations and cutaway demonstrations to build the idea from first principles.
Held up as a marvel of pedagogy and the best explanation of differentials, recommended again and again.
20 comments from Hacker News
That was a great video, thank you! Knowing basic gear mechanics helps a lot in understanding how cars function. This 1937 video about differentials is also enlightening: this video Why is it that old tutorial videos are so thorough and informative?
One of the best "how this mechanical thing works" for me is about differential/steering by Chevrolet (1937.). It's almost 100 years old by now but still one of the best "how" videos ever. this video
Not just military training videos, older ones in general are often superior to what gets made today. My favorite is probably this one on vehicle differentials: this video
First thing I thought of when you said that: this video Done properly, it's an amazingly powerful way of explaining things.
A similar thing - the best explanation I've seen about how cars' differential steering works comes from 1937. this video