pulse jet engine at work, right on your lab bench. 🔥 When you pour a small amount of methanol into a jar and swirl it, the liquid vaporizes and mixes with air. Ignite it, and that vapor combusts almost instantly, creating high-pressure gases that blast out of the jar. As the pressure drops, fresh air rushes back in, reigniting any leftover vapor. That repeating cycle — combustion, expansion, suction, ignition — creates the rhythmic popping sound you hear. Each “pulse” is a mini explosion, turning chemical energy into thrust and sound waves. It’s a stunning example of how combustion chemistry, fluid dynamics, and wave physics come together in a single, visually simple demo. This exact principle scaled up became the foundation of early pulse jet engines — the same type used to power the German V-1 flying bomb in WWII, and later adapted for experimental propulsion systems. Science rarely looks this dramatic, but it’s pure physics in motion. #STEMeducation #Combustion #PulseJet #Ther...