A new Fast & Ultra-Fast Neutron Nuclear Propulsion System

Ernesto Eduardo Dobarganes
1 min readNov 8, 2022


A new concept for a 50,000 km/s space propulsion system.

This article presents in the most general and brief form possible, a concept that I came up with when I was about 14 years old and that I forgot until recently… and I finally stopped postponing its publication.

The concept is quite simple:

Nuclear Fission proceses release Neutrons with different levels of kinetic energy that can be controlled by different methods.

Fast & Ultra-fast Neutrons have velocities ranging from 14,000 km/s to 50,000 km/s. The emission of these Neutrons can be directed to generate trust, as seen in the concept presented in the image below.

A concave shape of a Neutron-reflector material like Graphite, with a Radioactive core in its center, would generate forward thrust for thousands of years with a maximum speed of 50,000 km/s.

Radioactive material (Green) would emit fast & ultrafast neutrons that would generate forward trust if surrounded by a concave shape of a neutron refractive or absorbing material (silver).

This propulsion system could power probes and vehicles for interstellar and deep space travel.

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Muchas Gracias.



Ernesto Eduardo Dobarganes

Self-taught Polymath. Space Entrepreneur Wannabe. Science, Nature, Tech, Sports, Arts & Martial Arts enthusiast.