I am working on the ATPL theory. Currently I am studying Aircraft General Knowledge just because it is the first on the alphabetical list after Air Law in alphanumeric order, and I don’t want to learn EASA Air Law now. I am still thinking about studying in the US, and regulations differs there more than any other subject.
I have found a great explanation of Piston Engine work principle: suck, squeeze, bang, blow 🙂
Actually I am pretty good in school-level physics, and I like vehicles, therefore I know how Piston Engine works. But I love that explanation 🙂