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Project "Orion": Powered by an Atomic Bomb Machine Gun


"QUANTUM SHOT" #485
Link - article by Avi Abrams



The Ultimate 1950s Space Technology, which almost made it to Saturn

Obviously, "almost" is a key word here, but apparently NASA still has "small secret contingency plan division" which is dedicated to preserving "Orion" nuclear propulsion technology - and reviving it in case of a killer asteroid threat.


(image credit: Adrian Mann)

So what exactly is this "Project Orion" - the most radical propulsion technology for kick-ass space missions? No, it's not the NASA's future space capsule ("Apollo-on-steroids", some may say) - but a proposed colossal nuclear-bomb-powered rocket from 1958:


(images by Rhys Taylor, see the full animation of "Orion" launch here)


Nuclear Propulsion: Getting More Miles Per Gallon

... or rather, giving you maximum payload per launch:



(image credit: NASA)

The ultimate BIG technology, conceived in the 1950s to go to Saturn, Jupiter, and beyond... was powered by a row upon row of controlled, directed nuclear blasts....


(Collection of George Dyson)

Here is a hugely entertaining talk video by George Dyson about the development and the current state of Project Orion:




Maybe somebody is already building it, in the remote Canadian Rockies

With a mass of 1000-2000 metric tons and 1000 nuclear bombs for propulsion the medium version alone would have been a terrifying monster. The "super" Orion design at 8 million tons could easily be the size of a small city. Here is a size comparison of some of the proposed versions:


(image credit: Selden)



As a side note, we should also mention project "Aldebaran" (1962) - immense nuclear-pulse sea-launch vehicle:


(image credit: astronautix)

Another US Air Force project from the 1960s - Project Pluto - nuclear powered cruise missiles (SLAM):





To the stars - one nuke at a time!

Various mission profiles for "Orion" were considered, including an ambitious interstellar version (asteroid defense and mining were among other ideas). This called for a 40-million-ton spacecraft to be powered by the sequential release of ten million bombs, each designed to explode roughly 60 m to the vehicle's rear.

Here are some visualizations:




(top image by Rhys Taylor)


The Partial Test Ban Treaty of 1963 effectively killed the project, after $11 million had been spent on its development over nearly seven years. These are the screenshots from top secret video, showing the tests:


(Collection of George Dyson)


What!? You wanna put 1000 nuclear explosions behind my back?



So, why it's not exactly the safest way to travel? Among other obvious things:

- the ship could explode on the launch pad, or before reaching orbit, endangering whole areas on Earth.
- the radiation levels for the space pilots were pretty significant.
- the people in Miami looking up and seeing this ship taking off could get eye burns (which gives you an idea how bright it might be)


(image via)


Classified... declassified... and RE-classified!

Parts of this project still seem to be classified today. George Dyson recollects: "NASA had no interest, they tried to kill the project. The people who supported it were the Air Force, so they made it top secret..." It is still very dangerous and touchy subject, mostly because of the heart of the project - controlled ways to get directed energy explosions, and directing nuclear explosions at the ship.



Unpublished documents - a set on Flickr. Tech historian George Dyson collected these papers, written a book "Project Orion", which chronicles the project and the lives of the scientists behind it - including his father, Freeman Dyson (remember the Dyson' Sphere?).



Arabic printing of the book, which says "Declassified" on the cover:


(Collection of George Dyson, image via, more info)


Orion's Possible Rebirth

The leading scientists of this project were actually planning to go into space on this monster, taking their kids with them. On the surface, this project appears to be killed (although parts of it live on in a strange ways)...

"But hey, it does make more sense than the space shuttle, so things are looking up", says George Dyson.


(Orion Nebula - image by NASA)

Article by Avi Abrams, based on material compiled by Bernd Missal. Additional reading and reference: 1, 2, 3

Also read: "Imagining the Tenth Dimension" - >

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YOUR COMMENTS::

26 Comments:

Anonymous Anonymous said...

interesting...

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Blogger wackawacka said...

think there was a bbc documentary on this. called to mars by abomb. they had footage from a small scale model test. it does work.

interesting because it takes the worry of weight out of the equation. instead of saving weight you build massive ocean liner level stuff because it no longer matters much.

it was canceled because the fall out is unacceptable amoung the other risks...

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Anonymous harman said...

You'd think this project would immediately be called off instead of going as long as it did just by the fact that you'd severely pollute the atmosphere.

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Anonymous Anonymous said...

With a clean fusion bomb fallout wouldn't be a problem but yeah with dirty nukes, Quote: "Freeman Dyson, group leader on the project, estimated back in the '60s that with conventional nuclear weapons, that each launch would cause on average between 0.1 and 1 fatal cancers from the fallout."

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Anonymous spiff said...

Anonymous, as far as I know a H bomb is only "clean" because its fallout is small in relation to its destructive power. You still produce more than enough fallout simply because a fission bomb is needed as a detonator for the fusion. There is no clean nuclear weapon. The term "dirty nuke" can either refer to a fission bomb with relatively high fallout due to low efficiency or to a conventional chemical explosive with radioactive material around it. The latter thing does not cause a nuclear explosion, but scatters radioactive debris around. It is in no way suitable to power a spaceship.

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Anonymous TimO said...

You have to remember the TIME this was invented in.... people seriously thought this planet was going to be obliterated by nuclear war in the 1950s-60s.

And if there is a killer asteroid or extraterrestrial threat of any kind, it would be a last-ditch, everyone left behind is dead anyway, "When Worlds Collide" type of project.

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Anonymous Austin said...

The interwebs have been absolutely abuzz with talk about this project. I've seen it in a few documentaries and more than a few posts. I did love that TED talk tho.

We still need to solve the 'ol problem of traveling distances that would take tens of thousands of years however...

Thanks for the comprehensive post!

Austin
www.sosauce.com

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Anonymous Anonymous said...

There is no reason why we simply couldn't assemble such a device in Orbit and let fly from that vantage point.

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Blogger jan said...

Project Orion and NERVA should be group projects for graduate Nuclear Engineering students. There should be ways to vastly improve performance and lover costs on both of theose systems.

Launch from Earth? Of course not. However, as anyone who has ever read SF knows, space ships are most easily built in space.

The cuts in time to Mars and beyond will prevent a lot of radiation problems.

Oh yes, exploding atomic bombs in space will pollute it. How could I overlook something like that. Darn!

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Blogger Mark Martel said...

Remember, the Sun is a natural nuclear fusion explosion that's been going on for about 4.5 billion years. Aside from that, all matter emits some miniscule amounts of radiation. Getting a sun tan is in fact a radiation dosage. And burning coal puts a lot of uranium in the air, since it's a trace element in coal. So an Orion ship's radiation should be kept in perspective.

Building it in space removes most of the risk to earth. And Orion or a Nerva type nuclear rocket (much different) open the whole solar system to human exploration. Instead of trips lasting years one can get around between planets in weeks.

Eventually we're going to have to accept that politically.

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Anonymous Anonymous said...

Project 'Daedalus' from Great Britain was similar to this one.

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Anonymous shanemcn said...

Read Footfall! Great read too!

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Blogger Stickmaker said...

I've been a fan of Orion for decades. It's one of those Big Engineering concepts many engineers (and I am an engineer) are fascinated with. Adding to the attraction, the only thing keeping it from working is an international treaty.

Project Pluto isn't nearly as big, but has the advantage of being dead simple overall. One person working on it described the vehicle as being "...about as complicated as a bucket of rocks."

A ramjet is a very simple heat engine: cold air in, hot air out. For Pluto, the heat source was a nuclear reactor made from advanced ceramics, glowing bright yellow.

The sonic boom from this thing making a low pass would collapse most buildings. The radiation it emitted would sterilize the ground under its path. (Maybe a slight exaggeration there.)

They ground tested a developmental version of the engine, and seriously discussed building a test vehicle. That would have been dumped in the ocean after the flight. The realization that if they lost control of the thing it could fly over an inhabited area killed the idea.

Still, you have to wonder if maybe we could use it to explore the atmosphere of Venus, or one of the gas giants...

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Blogger Avi Abrams said...

Stickmaker, really enjoyed your comment - told in plain terms, great overview

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Blogger GoletaBrian said...

It's not a bad idea once you get off-planet. Someday, one of the export products spent up the space elevator will be nuclear bombs to propel enormous interplanetary vehicles.

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Blogger jin said...

this kinda thing is also a significant plot point in neal stephenson's anathem! that's where i first heard about it.

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Anonymous Erik said...

It's not a bad idea once you get off-planet. Someday, one of the export products spent up the space elevator will be nuclear bombs to propel enormous interplanetary vehicles..

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Anonymous Project Orion fan said...

The idea that Orion is inherently unclean is untrue. The reason a bomb can be dirty is the stuff that gets sucked into an explosion (including bomb casings) and then spread around. That is why normal ground-level detonations (where dust and soil gets sucked in) produce vastly more fallout than airborne ones.

In the late 50s, the calculation was 1 to 10 premature deaths per ground launch of Orion. That isn't 10 specific people die - but that 10 people would statistically die earlier than they otherwise would have.

I personally do not think that risk is unacceptable. Many thousands, perhaps hundreds of thousands, perhaps even millions, of people die prematurely every single year because of industrial pollution from cars, factories, industry etc. Likewise hundreds of thousands of peoples are killed or injured in road accidents, every single year. While these are tragic, nobody says the risk is unacceptable and we better give up cars/industry/technology and return to living in caves.

Anyway, another point is the risk can be further reduced today. A modern Orion would use a ground-based pusher plate to reduce fallout, and would use better/lighter bombs so less casings to be sucked in too.

The two remaining problems are EMP (electro magentic pulse), legal and political. The EMP problem can be solved by a sea launch say near the South pole. The legal issue is that it is illegal to take nuclear weapons in space or explode them - but this could be resolved by renegotiating international treaties if there was political will. The political problem is the biggest problem - many people, often regardless of how little they know about nuclear technology and nuclear science, are against anything nuclear, because it sounds bad to them or believing too much bad late night scifi.

The reason we need Orion is its the only way we can get a substantial presence in space. One Orion is equivalent to hundreds, even thousands, of conventional rocks. If we don't start using energy and resources from space (the first step of which is a large presence beyond the Earth), we are going to wreck this planet before too long.

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Blogger jin said...

huh?

1. materials don't BECOME radioactive do they? the dust and stuff from a ground explosion doesn't contribute to the "dirtyness" of the bomb does it?

2. why on earth would you LAUNCH with nukes? just use conventional rockets to get the thing into orbit (or just build it there) and then you can nuke away in space.

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Blogger neil craig said...

That 01-1-10 deaths figure would presumably have been calculated on the LNT (linear no threshold) theory of radiation damage. While that is still politically accepted the hormesis theory that at a low level radiation is actually beneficial has the evidence going for it.

http://www.jerrypournelle.com/archives2/archives2mail/mail311.html#hormesis

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Anonymous PT said...

Did a speech in 80's including this method as alternative to STS. Also included matter/antimatter propulsion. Only problem I foresee is NASA's history of accidents! That would be huge..

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Anonymous Anonymous said...

yes, Jin, things do become radiactive when hit with enough nuetrons, cobalt is a pretty nasty example

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Anonymous Anonymous said...

what a waste. why they didn't use more sensible inertial drive. its most idiotic to blast behind spaceship when there are lots of other ways to do it. the main goodness of inertial drive is that it can be used in closed system, there is no need for interaction with outside-spaceship environment.

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Anonymous John said...

I would argue that a clean fusion bomb would be possible, if it could be detonated without a fission trigger. This is theoretically possible, but I've never heard of anyone being able to do it. If it could actually be done, it would naturally be top secret, to avoid terrorists/enemies etc exploding cheap nukes that don't require difficult to obtain plutonium or U235. No doubt it would be too big and clumsy to make a useful weapon, but it wouldn't really matter to Orion if each propulsion unit weighed a couple of tons.

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OpenID waynerobertsmith said...

the main advantage of orion is its lift capacity. If you use multiple chemical boosters to carry Orion into space you lose its primary advantage. Jerry Pournelle suggested to me that a sea launch would avoid a lot of fallout. Also, a ground launch with a thick metal pad coated in graphite would produce very little irradiated dust. I wrote this Orion article 10 years ago. http://www.spacedaily.com/news/nuclearspace-03h.html

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Anonymous Anonymous said...

Nuclear fission bombs are crude and inefficient ways to convert mattter into energy, the best current way is to use antimatter and feed the explosion continually by injecting it. Now you only use a nuclear plant to power the antimatter production. This all could be build in space. Once the scientist concentrate on the production of antimatter, the output would be far grater dan todays, since this is not a prority nower days. The difficult part would be to transport the antimatter from production plant to explosion whitout the need of storrage, the existence of antimatter is to short

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