The ship that drinks from comets.
The idea
The Kettle is a water-propellant nuclear thermal launch vehicle. A nuclear reactor heats water into superheated steam and pushes it out a nozzle. No combustion, no soot, no chlorine, no alumina — and a propellant you can find almost anywhere humans want to go.
The physics is not speculative. Nuclear thermal propulsion was ground-tested in the 1960s: the NERVA/Rover program’s Phoebus 2A reactor ran at 4,100 megawatts — for years the most powerful reactor ever built — and NASA’s own recent assessments confirm water as a viable NTP propellant. The Kettle adapts proven reactor heritage to the one propellant the solar system hands out for free.
Why water
- The atmosphere. Chemical launch puts black carbon and alumina where nothing else operates — the stratosphere — at a scale peer-reviewed science now calls an unregulated geoengineering experiment. Steam doesn’t. (We put our own exhaust on trial too: see Hearing #4 — The Plume.)
- The monopoly. Whoever builds the first off-world propellant refinery owns the road to everywhere — a tollbooth at the top of the gravity well. Water is everywhere: comets, asteroids, the Moon’s poles, Europa. A rocket that runs on water means nobody owns the road. Everyone brings their own kettle.
- The refuel. A propellant you can mine with a drill and a heater turns deep space from a one-tank problem into a network of wells.
Read the case
- The Bomb and the Kettle — chemical failure modes vs. nuclear heritage, and why “nuclear” is the everyday technology here.
- Kettles for the Commons — the refinery-monopoly argument in full.
- No Significant Impact — 146 approved launches a year, and the finding that waved them through.
- The Plume We Don’t Talk About — the honest comparison of exhausts, including ours.
Where it stands
The Kettle is at concept stage — architecture defined, propulsion baselined against published NERVA-era test data and current NASA technical assessments, with the feasibility modelling (the graduated water-to-hydrogen-enriched launch profile) as the first funded engineering question. The claim it rests on is filed where anyone can attack it: in the Hearings.
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