Different domain, but when I owned a little airplane, I took classes from a pilot-owner association about that line of aircraft. They were still simple enough,

Different domain, but when I owned a little airplane, I took classes from a pilot-owner association about that line of aircraft. They were still simple enough, by design, that you wanted to know as much as possible about the way it was put together. For example: I learned that the fuel lines from the tanks in the overhead wing ran inside the door posts, what would be the "A" and "B" pillars of a passenger car. Such details were super interesting, when I would run engine-out landing scenarios in my head during my walk to the office each morning.