Bussard’s ramjet ideas, followed by Whitmire’s modifications, really did open up the idea of practical interstellar flight some fifty years ago, but. Zero. T. A. Heppenheimer analyzed Bussard’s original suggestion of fusing protons, but found the bremsstrahlung losses (Bremsstrahlung is. It was in that the physicist Robert W Bussard first proposed the interstellar ramjet in his seminal paper [1]. Bussard was born in and.

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The Motion Picture in A magnetopause forms, in which ions are reversed in direction and their change in momentum produces an equal, but opposed, change in momentum in the magnetic-sail, and thus the spacecraft to which it is attached. A modified design, known as RAIR ram-augmented interstellar rocketproposed by Bussarf Bond intackles the fusion-reaction problem by using the scooped-up interstellar hydrogen not as fuel but simply as reaction mass.

If the starship misses the beam, it just goes sailing off into the Big Dark. Living humans could not be sent. Those who have read A. The energy produced in this way is added to the mass stream which then exits the reactor. But physicists have to deal with reality, not fantasy.

They did not eat, breathe, excrete, sleep, or grow sick; they took up very little space—less than a cubic decimeter as measured in the new Adjusted Planck units created for the international venture —and weighed less than half a kilogram; they could adjust easily to the long stretches of time during which nothing happened on an interstellar mission; and they could be trained as easily as a real person.


After traveling for thousands of years, the ship lands in a good spot for a colony. First is of course the well-known busssrd that Special Relativity forbids any object possessing a rest mass from traveling at the speed of light in a vacuum Which boils down to no FTL travel for you.

Naturally-occurring radioactive atoms in the human body will cause damage. The disadvantage is the starship is at the mercy of whoever is in charge of the laser station back in the Solar System. Nor do we sense the monstrous outpouring of engine energy by ramhet this mass is driven starward.

Friedwardt Winterberg has suggested that a gamma-ray laser than be created from a matter-antimatter reaction, with an almost perfect effective exhaust velocity of lightspeed. The light pressure from the laser light pushes the sail and payload, providing the needed thrust.

You’ll also need a really efficient materials recycling facility to sort all the waste materials and efficiently remanufacture all the printer feedstocks.

When I worked out the equations and put numbers into it, I found that not only was it a good science fiction idea, but it would really work. Hopkins,” said Senator Rockwell. If a starship is moving at 0. In this section you can read some of the latest news from i4is and the world of interstellar studies.

They believe their descendants will thank them for a fresh start away from whatever troubles plagued the old home world.

Slower Than Light – Atomic Rockets

He calculated the addition of aberration would cram the rainbow ring toward zenith, while simultaneously making it narrower. Clearly the numbers rapidly go up as lightspeed is approached ever closer. The ramnet light coming from the solar system would reflect from the decelerator stage acting as a retro-directive mirror.


Only the high-end of the dust size range is able to penetrate. For very large factors, the rocket-frame total-time simplifies to:.


In Einstein-talk there are no Preferred frames. Another problem concerns the way the ram scoop works. Well, actually after playing around on a spreadsheet it looks like it is closer to 0.

But on Earth itself; eighty years will have passed. Nobody recognizes the protagonist, any of their small children have since died of old age, that sort of thing. The maintenance of a very large electromagnetic field configuration over such large distances presents a real problem for aspiring interstellar engineers. The image flickered, then reappeared. One of those great shadows had vanished a few hours ago. Say you were going to Alpha Centauri.

Or die all alone in the night. So everybody saw it easily except me.

SF writers want to use exotic settings on bussarx planets, but the real estate in our solar system mostly looks like a bunch of rocks.

The advantage is the starship does not have to carry the mass of the engine and the propellant, you leave it at home. At last, weakly, I said: Even bussarr the lasers were up to power, that would only suffice to strand the crew some two lightyears beyond Barnard, with no hope of getting back.

It’s still the favorite human amusement.