![]() Nothing fundamentally absurd about a powered anti-gravity device, if theĮnergy source is adequate. Willy Ley puts it very neatly when he says that the inventor ofĬavorite doesn't need it, because if he can enter his vehicle his musclesĪre powerful enough for him to jump to the Moon directly. The same as that required to lift the mass through 4000 miles against normalĮarth gravity. To get a mental picture of the amount involved, it is To escape from the Earth, then the energy needed to perform this feat must be If by enclosing a mass inside a screen of Cavorite it could be given the ability (I remember a story in an early Astounding featuring just such a device!) Using it to lift a weight, and then removing it so that the weight fell again. One could use it as a perpetual source of energy, merely by Quibble, but is of an altogether different order of magnitude to the objectionsĪ gravity screen such as Wells describes canīe demolished by common sense, without bringing the heavy artillery of the Laws That human beings could survive some 10,000 g. The only basic absurdity in Verne's novel is Like the almost horizontal guns the Germans were building to shoot across the Space-gun would be several thousand feet long and would use multiple charges-exactly (And, incidentally, usedĪn evacuated barrel.) Although this is only a seventh of escape velocity, a Payloads from sea level at over a mile a second. '60's on Barbados by McGill University launched two hundred pound research Interesting to note that the 119 foot long HARP 16-inch gun operated in the late Technology, and a location on Everest, such a gun could be built. Von Pirquet proposed to overcome this problem. 10)ĭiscusses the modifications (mountain site, evacuated barrel) that Oberth and Willy Ley ( Rockets, Missiles and Men in Space, ch. Perfectly sound, though it could not have worked as he described because of air Of 'impossibility that cannot easily be demonstrated-whereas Verne's canonĬould have been demolished on paper at the time he wrote." The truth is Incredulity Alex Eisenstein's statement (p306) that "Cavorite.is the kind On the Eisenstein-Suvin Exchange (see SFS Turner-Bookman, PO Box 2612, Menlo Park, CAĩ4025 Ferret Fantasy, 27 Beechcroft Road, Upper Tooting, London SW17 Tempsįuturs, 3 Rue Perronet, 75007 Paris. List the five booksellers that take ten or more copies of each issue of SFS:ĭragon Press, Elizabethtown, NY 12932 The Science Fiction Shop, 56 EighthĪvenue, New York, NY 10014 David G. Major fan magazines, such as Locus and Algol here I will merely Have contact with some fan publishers, so that one might do better to order from Store, the ordinary store is not likely to have them in stock and might well not Most if not all of the books reviewed in SFS may be obtained from any book ![]()
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