From Urban Times:
Project Orion: Why Space Exploration Should Go Nuclear
The Orion spacecraft. Via Wikipedia
The human race, as it has always been, is on course for extinction.
The Sun will lumber through its life cycle and, in the process of this,
will engulf the Earth and destroy everything on it. This isn’t exactly
new information and it’s one of the reasons why the continuing
development of space exploration is essential to the
survival of our species
(and all others bound to this planet for that matter). One day, for
whatever reason, without the creation of an invulnerable shield and a
way to get energy without the Sun, we will have to leave this Solar
System.
A design for Orion Pulse Unit. Via Wikipedia
This idea was slightly covered in xkcd’s “What If” weekly post entitled
Everybody Out.
This piece attempted to answer the question of whether or not there is
enough energy to remove the entire population off of Earth. After some
calculations in regards to the use of chemical propulsion (ie the same
technology we use now to launch satellites and spaceships), just to move
the weight of all the people (not including the rocket, fuel or
anything else) we would need 8 petawatt-hours, or 5% of the world’s
annual energy consumption.
. One of the fundamental issues
surrounding [rocket science] is the fact that rockets need to carry the
weight of the fuel itself.
Rocket
science, as you probably know, is not exactly simple. One of the
fundamental issues surrounding it is the fact that rockets need to carry
the weight of the fuel itself. This suggest the creation of a never
ending loop of increasing the necessary amount of fuel to carry the
increasing overall weight due to extra fuel. This problem is solved
using calculations based on the fact that the weight of the ship will
decrease as fuel is burnt. As you can imagine, it is not the most
efficient of methods.
At the end of the “What If” piece, we are given an estimation for the amount of fuel necessary to lift the entire weight of the
population
(roughly 400 million tons of flesh, bones and hair) would amount to
tens of trillions of tons of fuel.It would take up a huge proportion of
all hydrocarbon fuels on the planet. Of course, you could suggest we
could use
alternative fuels,
but we still have to consider the weight for the ship, water, food and
anything else we’d like to bring (xkcd’s article points out that there
are about a million tons of pet dog just in the US). The article sums
its verdict up with this sentence, “It’s not necessarily completely
impossible, but it’s certainly outside the realm of plausibility.”
Obviously, the above example is taking things to the extreme, but it
highlights the point that current propulsion systems are generally not
that great. In the event of a global exodus, we would have to leave a
hell of a lot of people behind without some new technology or, in this
case, the revival of an old one. In my opinion, the most viable
alternative is also the one that sounds the most insane. It is the idea
that we should launch ourselves into space by riding the shock waves of
nuclear bombs.
Led by physicists Ted Taylor and Freeman Dyson,
Project Orion began in 1958 and is a perfect example of how close
madness and genius
become. The idea of nuclear propulsion was first proposed by Stanislaw
Ulam way back in 1946. A year later, Ulam and F. Reines made the first
calculations. The project came to end in 1963 in response to a lack of
political support due to fears of nuclear fallout and the introduction
of the Partial Test Ban Treaty. Admittedly, in a world continuously in
fear of all-out nuclear war, the idea of propelling spaceships with
radioactive bombs was hard for people to get behind.
So how does it work? You would expect anything within the vicinity of
a nuclear explosion would be destroyed, but not in this case. Project
Orion designed a shield that would be able to harness the propulsion of
the shockwave and thus keep itself ahead of the explosion itself. On the
face of it, it is a pretty simple concept. Of course meticulous
calculations had to be done to get a viable design completed. Dyson was
very
hopeful about this
project saying, “…a Saturn V bears the same relation to an Orion ship
as the majestic airships of the 1930’s bore to the Boeing 707”.
Why would an Orion spaceship be so much better? Well, it is the fact
that it can combine a high exhaust velocity with massive levels of
thrust, which is something rocket propulsions cannot do easily. This
means a nuclear propulsion system is by far much more efficient and
requires significantly less fuel as seen in this table looking at
possible payload weights demonstrates:
:
As you can see, as the journey length increases the Saturn V rocket
becomes more and more laughable. Of course, you might say that the
Saturn V is out of date and that surely more modern rockets perform
better. Well, in fact, to this day, the Saturn V holds the record for
the heaviest launch vehicle payload. If ever tested, an Orion spaceship
would have blown it out of the water.
Governments should be investing more and more in viable interplanetary technology
It is a shame the project was discontinued when it was. It was clearly a
visionary
idea that would have revolutionised space travel for the future. What’s
the problem with a bit of fallout when the Earth is going to be
destroyed? Dyson managed to work out the essentials for lifting
8,000,000 tons (easily the weight of a city) into space using Orion
methods. This could easily be achieved considering the stockpiles of
nuclear weapons around the world.
Carl Sagan himself made the point that it would be a good way to use them up.
The solution to saving mankind is the thing that came closest to
ending it. Governments should be investing more and more in viable
interplanetary technology and I would wager that nuclear propulsion is
our best shot. Paranoid fears about radiation should be dismissed can
considered in a more reasoned way. We should not be eschewing technology
because of outdated Cold War fears.
The Orion spacecraft. Via Wikipedia
The human race, as it has always been, is on course for extinction.
The Sun will lumber through its life cycle and, in the process of this,
will engulf the Earth and destroy everything on it. This isn’t exactly
new information and it’s one of the reasons why the continuing
development of space exploration is essential to the
survival of our species
(and all others bound to this planet for that matter). One day, for
whatever reason, without the creation of an invulnerable shield and a
way to get energy without the Sun, we will have to leave this Solar
System.
A design for Orion Pulse Unit. Via Wikipedia
This idea was slightly covered in xkcd’s “What If” weekly post entitled
Everybody Out.
This piece attempted to answer the question of whether or not there is
enough energy to remove the entire population off of Earth. After some
calculations in regards to the use of chemical propulsion (ie the same
technology we use now to launch satellites and spaceships), just to move
the weight of all the people (not including the rocket, fuel or
anything else) we would need 8 petawatt-hours, or 5% of the world’s
annual energy consumption.
. One of the fundamental issues
surrounding [rocket science] is the fact that rockets need to carry the
weight of the fuel itself.
Rocket
science, as you probably know, is not exactly simple. One of the
fundamental issues surrounding it is the fact that rockets need to carry
the weight of the fuel itself. This suggest the creation of a never
ending loop of increasing the necessary amount of fuel to carry the
increasing overall weight due to extra fuel. This problem is solved
using calculations based on the fact that the weight of the ship will
decrease as fuel is burnt. As you can imagine, it is not the most
efficient of methods.
At the end of the “What If” piece, we are given an estimation for the amount of fuel necessary to lift the entire weight of the
population
(roughly 400 million tons of flesh, bones and hair) would amount to
tens of trillions of tons of fuel.It would take up a huge proportion of
all hydrocarbon fuels on the planet. Of course, you could suggest we
could use
alternative fuels,
but we still have to consider the weight for the ship, water, food and
anything else we’d like to bring (xkcd’s article points out that there
are about a million tons of pet dog just in the US). The article sums
its verdict up with this sentence, “It’s not necessarily completely
impossible, but it’s certainly outside the realm of plausibility.”
Obviously, the above example is taking things to the extreme, but it
highlights the point that current propulsion systems are generally not
that great. In the event of a global exodus, we would have to leave a
hell of a lot of people behind without some new technology or, in this
case, the revival of an old one. In my opinion, the most viable
alternative is also the one that sounds the most insane. It is the idea
that we should launch ourselves into space by riding the shock waves of
nuclear bombs.
Led by physicists Ted Taylor and Freeman Dyson,
Project Orion began in 1958 and is a perfect example of how close
madness and genius
become. The idea of nuclear propulsion was first proposed by Stanislaw
Ulam way back in 1946. A year later, Ulam and F. Reines made the first
calculations. The project came to end in 1963 in response to a lack of
political support due to fears of nuclear fallout and the introduction
of the Partial Test Ban Treaty. Admittedly, in a world continuously in
fear of all-out nuclear war, the idea of propelling spaceships with
radioactive bombs was hard for people to get behind.
So how does it work? You would expect anything within the vicinity of
a nuclear explosion would be destroyed, but not in this case. Project
Orion designed a shield that would be able to harness the propulsion of
the shockwave and thus keep itself ahead of the explosion itself. On the
face of it, it is a pretty simple concept. Of course meticulous
calculations had to be done to get a viable design completed. Dyson was
very
hopeful about this
project saying, “…a Saturn V bears the same relation to an Orion ship
as the majestic airships of the 1930’s bore to the Boeing 707”.
Why would an Orion spaceship be so much better? Well, it is the fact
that it can combine a high exhaust velocity with massive levels of
thrust, which is something rocket propulsions cannot do easily. This
means a nuclear propulsion system is by far much more efficient and
requires significantly less fuel as seen in this table looking at
possible payload weights demonstrates:
:
As you can see, as the journey length increases the Saturn V rocket
becomes more and more laughable. Of course, you might say that the
Saturn V is out of date and that surely more modern rockets perform
better. Well, in fact, to this day, the Saturn V holds the record for
the heaviest launch vehicle payload. If ever tested, an Orion spaceship
would have blown it out of the water.
Governments should be investing more and more in viable interplanetary technology
It is a shame the project was discontinued when it was. It was clearly a
visionary
idea that would have revolutionised space travel for the future. What’s
the problem with a bit of fallout when the Earth is going to be
destroyed? Dyson managed to work out the essentials for lifting
8,000,000 tons (easily the weight of a city) into space using Orion
methods. This could easily be achieved considering the stockpiles of
nuclear weapons around the world.
Carl Sagan himself made the point that it would be a good way to use them up.
The solution to saving mankind is the thing that came closest to
ending it. Governments should be investing more and more in viable
interplanetary technology and I would wager that nuclear propulsion is
our best shot. Paranoid fears about radiation should be dismissed can
considered in a more reasoned way. We should not be eschewing technology
because of outdated Cold War fears.