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Project Orion

Short answer: Project Orion was a U.S. study from 1958 to 1965, led at General Atomics, of nuclear pulse propulsion: small nuclear explosions behind a spacecraft would strike a large pusher plate whose shock absorbers smoothed the thrust.

It promised performance far beyond chemical rockets, with trips to Mars in weeks, but ended after the 1963 Partial Test Ban Treaty barred nuclear explosions in the atmosphere and space. The footage, credited to spaceman.in, shows an animated Orion craft.

VideoWrite-up1 sources
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What should you know about Project Orion?

Quick facts. Each one stands alone and has a stable ID you can cite.

  1. 1958-1965.

    DD-496-F01 · Write-up · Exhibit A (Years)

  2. General Atomics.

    DD-496-F02 · Write-up · Exhibit B (Lead)

Video transcript: Project Orion: Project Orion Proposed Pushing a Spacecraft With a Series of Nuclear Blasts

Project Orion was [...] 1950s and 1960s [...] space travel. [...] nuclear explosions, [...] absorbing [...] promised [...] far beyond [...] Mars in weeks [...] NOW YOU KNOW!

Burned-in captions, read frame by frame (see transcript.md) · 25.1s Reel ·

Video coming soonProject Orion · Instagram Reel
Project Orion: Project Orion Proposed Pushing a Spacecraft With a Series of Nuclear Blasts Instagram Reel · · 25.1s

The write-up

Project Orion proposed pushing a spacecraft with a series of nuclear blasts. A pusher plate would absorb each shock.

  1. Exhibit A

    Years

    1958-1965.

  2. Exhibit B

    Lead

    General Atomics.

  3. Exhibit C

    Method

    Nuclear pulse.

  4. Exhibit D

    Plate

    Absorbs shocks.

  5. Exhibit E

    End

    1963 test ban.

Questions people ask about Project Orion

Propulsion?

Bombs.

Source: Write-up · Exhibit A (Years) · Wikipedia: Project Orion (nuclear propulsion)

Absorbs blasts?

Shock.

Source: Write-up · Exhibit B (Lead) · Wikipedia: Project Orion (nuclear propulsion)

Era?

Cold War.

Source: Write-up · Exhibit C (Method) · Wikipedia: Project Orion (nuclear propulsion)

What ended it?

1963.

Source: Write-up · Exhibit D (Plate) · Wikipedia: Project Orion (nuclear propulsion)

Promised trips to Mars in?

Fast.

Source: Write-up · Exhibit E (End) · Wikipedia: Project Orion (nuclear propulsion)

Test Your Knowledge

All quizzes →

5 questions, all from this case file. Answers are revealed instantly.

  1. Propulsion?

    1. Nuclear pulses
    2. Solar sails
    3. Ion drive
    4. Chemical only
    Show the answer

    Answer: A. Nuclear pulses Bombs. Source: Write-up · Exhibit A (Years) · Wikipedia: Project Orion (nuclear propulsion)

  2. Absorbs blasts?

    1. Pusher plate
    2. Wings
    3. Nose cone
    4. Fuel tank
    Show the answer

    Answer: A. Pusher plate Shock. Source: Write-up · Exhibit B (Lead) · Wikipedia: Project Orion (nuclear propulsion)

  3. Era?

    1. 1950s-60s
    2. 1990s
    3. 1920s
    4. 2010s
    Show the answer

    Answer: A. 1950s-60s Cold War. Source: Write-up · Exhibit C (Method) · Wikipedia: Project Orion (nuclear propulsion)

  4. What ended it?

    1. Test ban treaty
    2. Lack of fuel
    3. A crash
    4. Moon landing
    Show the answer

    Answer: A. Test ban treaty 1963. Source: Write-up · Exhibit D (Plate) · Wikipedia: Project Orion (nuclear propulsion)

  5. Promised trips to Mars in?

    1. Weeks
    2. Decades
    3. Hours
    4. Years
    Show the answer

    Answer: A. Weeks Fast. Source: Write-up · Exhibit E (End) · Wikipedia: Project Orion (nuclear propulsion)

Cite this case file

Easterling, Marcus. "Project Orion." The Detail Department (DetailEnjoyer), case file DD-496, last updated Feb 23, 2025. https://detailenjoyer.com/case/project-orion/

Permalink: https://detailenjoyer.com/case/project-orion/ · Last updated

Markdown version

Cite a single fact by its ID, for example DD-496-F01 → https://detailenjoyer.com/case/project-orion/#DD-496-F01