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Preface: I know NOTHING about combustion engines and generally have never had the desire to.
But the “Driving 4 Answers” channel breaks down how all kinds of different engine designs work, explaining the pros and cons of each. Some have tons of apparent advantages that make you wonder why they aren’t used in production cars and trucks. He digs deep to answer that question.
Here’s a great video about the rotary vane engine.
The twin rod Avadi engine is a very different approach.
This one explains the crossplane inline 4. I had never even heard of such a thing before, but the way it’s explained is absolutely fascinating. He even demonstrates the different sounds so I feel like I could just listen to a car and know what kind of crankshaft it has.
Highly recommended.
The only reason Google is still my default search engine on desktop is …. dates.
I’m a dev and the date next to each search result helps me skip a ton of irrelevant links and get to the ones that most likely apply to my situation. DDG and other search engines usually don’t show any dates.
I’ve sent feedback to DDG on this but obviously that had no impact. If they add dates, I’m done with Google.
On mobile I still use DDG since my searches are generally not date specific.