Explained with live physics you can play with — real equations solved in your browser, no black boxes, no pre-baked animations. Start at the whole machine and keep going down until you hit the mathematics.
Every page on this site answers one question: how does the machine actually work? Not with arrows and hand-waving, but with the real physics — burning fuel pushing a piston, air bent downwards over a wing, four patches of rubber gripping the road. Cars and planes are the two big stories; engines of every kind run through both. The demos are honest simulators: each one solves its governing equations live in your browser, so dragging a slider changes the physics, not the frame of a canned animation.
The writing aims at a curious A-level physicist — plain language first, then a “Go deeper” section on every topic for when the simple version stops being enough. When you want more than we cover, two free resources we rate highly are NASA’s Beginner’s Guide to Aeronautics for flight theory and MIT OpenCourseWare for the thermodynamics underneath every engine. Otherwise, start anywhere — the eight-chapter car story, the four chapters of flight, or straight into a simulator in the Labs.