GoKawiilNASA and General Atomics sketch nuclear rocket engine concept on a napkin
Kurt Polzin, chief engineer of NASA's space nuclear propulsion project, and Robert Schleicher of General Atomics Electromagnetic Systems roughed out a nuclear rocket engine design on a napkin during a conference conversation last year. The concept remains at an early paper-planning stage, following a long tradition of major technical breakthroughs first appearing as napkin sketches, from Compaq's portable PC to Vishay's power resistor.
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Faster propulsion is central to any serious human Mars mission, since prolonged exposure to cosmic radiation outside the protection of Earth's magnetic field poses severe health risks the longer a trip takes. Nuclear propulsion has long been floated as a way to cut transit times dramatically, but decades of similar proposals have stalled without funding or engineering follow-through, making this napkin sketch a modest but telling sign of renewed interest.
- NASA and General Atomics are informally developing a nuclear rocket engine concept, currently only a rough sketch.
- Faster propulsion is critical for reducing astronauts' radiation exposure on long trips beyond Earth's protective magnetic field.
- The idea joins a long history of major innovations, from computers to electronics components, that began as napkin sketches.
Moleskine Classic Notebook, Squared — For anyone whose best ideas arrive mid-conversation, this is a sturdier canvas than a diner napkin. The squared pages are ideal for quick engineering sketches and back-of-envelope math, and the hard cover and elastic closure keep your napkin-moment safe until it's ready for the Smithsonian.
See Moleskine Classic Notebook, Squared on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: spectrum.ieee.org — Harry Goldstein, 2026-08-29
Published there as: “Noodling on Nuclear Engines”
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