# @stem_antics on Instagram

- **Type:** Image
- **Original URL:** https://www.instagram.com/p/DQ-AWUPEQKg
- **Gondola URL:** https://gondola.cc/posts/76866111-stem-antics-instagram
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/postThumbnails/25a0ca4ed1.jpg
- **Posted:** 2025-11-12T19:53:10.000+00:00
- **Account Owner:** Stem Antics (@stem_antics) — https://gondola.cc/stem_antics

## Caption

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 #Thermodynamics #EngineeringExplained #STEMdemo #PhysicsFun #ScienceReels #FluidDynamics #STEMlearning

## Stats

- **Views:** 0
- **Likes:** 140
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- **Comments:** 1

## Credits

No public credits are recorded here. This does not identify who made the post.

## Tags

pulsejet, physicsfun, sciencereels, fluiddynamics, stemlearning, stemeducation, stemdemo, engineeringexplained, combustion, thermodynamics

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