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for all y'all with pulse fetishes
Though this is an older message, that is great for someone RPing the Orion Drive.. it uses nuclear pulse propulsion, dropping a small nuclear bomb behind the ship every few seconds and using the destination to push the ship forward.. It is the most efficient spacecraft engine humanity has devised.. It started as a joke, until they did the math. The concept was proven using chemical explosives and during the orgy of nuclear spending during the 1950s, it got approved for further research. Through this the 'nuclear shape charge' was dreamed up, designed, developed and tested. We even designed ships using it... until the Air Force got ahold of it and designed a space battleship just one of which could sterilize the planet three times over. They even made a mockup of it and proudly showed it to President Kennedy.. He, rightfully so, freaked out about it and what the Soviet reaction would be if they got ahold of even a picture of the model. He ordered it all destroyed and shut down. Though the risk for terrorism in Earth orbit is too great, this still remains the most cost and energy efficient way to get something like a starship up to relativistic speeds to travel to another star. Further, due to the fact that Thermonuclear Weapons have no maximum limit to how powerful you can make them, this drive could even be used for something the size of a space ark.
</useless fact of the day>
See here for Information <----A write up on all of it.