Historical Hack: Henri Griffard’s Steam Injectors

Per Hackaday, a 19th‑century steam injector uses Bernoulli’s principle to push water into a high‑pressure boiler without any moving parts. The device first speeds up steam through a nozzle, creating a low‑pressure zone that sucks in feed water, then compresses it before it enters the boiler. Hackaday notes that the method saves both coal and water, a clever reuse of physics that still powers vintage locomotives today.

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