Document rrYMoKb3p8OveQNQNEV2anKV

[ gr*o*m* mO0e0t4J rj. tDlTOtl mil IQS! UTAflUSHgO H-Bombs Versus Common Sense >* / J K M/.JUr., W * <au,.PUn,,W.^ ,W tnduaim RxiitlL Aim. Eliminate paper wait Ordinary V belts on these drives lasted only a year. They couldn't take the 24-bour service, the heavy load tunning the pulp beaters. Cov ert would separate from the belt, flap around the drive, get caught in pulleys, finally teat oil completely. A BFG distributor heard of the' trouble and recommended gromma V hdu. U proved ro be a pofro solution. Installed in 1941, bothicq of grommet V belts have iltesdr outlasted other belts by {Oyn,m still look good for ycus'moce These typical examples (see preceding page! tell you why B. F. Goodrich grommet belli are superior to ordinary V belts--prov< they last 20 to 50% longer--yet cost no more ! Tin S, f. S*kk C*M>pe>nr |W } Akrn, OH(* I __ Q Hr*e him* BFQ ttijcribvtorolfon m* wAVuti grommet Vbdu. O Seed tei of tepont teCtins awn' ctpejtnxe* *inl thownf iituil iinr*JIuwi where arofflniet Mil oudurrd ell other*. *Jtmr _ Tide. Fims Nm_ Addieu-- mt AMEBttwr fuduc has never recovered from it* origiesl confusion about the atom bomb--what it will raft do. And now we enter e new era of H-bomb attractive than you think. Why? Because larger bombs are doubly inefficient. Firsts thoy destroy (ess ares per unit of power. Second, there are no suitable targets. iriofl. ir luny thinking springs from loo much rhetoric net enough arithmetic and geometry. If we would in terms of circles and maps, atom bombs and H* would be as easy to aiae up as the family oar. how, using the original atom bomb as a yardIts energy equals 20,000 tona of TNI'. Call it the it bomb. For s practical knowledge of nuclear weapons, pick Ha map 0$ some major American city or imogined bdiWiial target area. To the scale of this map draw a 'dfde 2V5 miles in diameter--four square milea. . Center this circle on some likely-looking spot for an tsemj bomb burst. Figure that everything In the circle b either destroyed or heavily damaged. Estimate the sQitary value of the people, structures and equipment in (be vies. Do the tame for other possible targets. List them in order of their importance. Imagine the enemy doing just this for the whole of United States. He'd come up with a list of top* Parity targets. If be works down from the top of this (1st until his Baited supply of atom bombs is exhausted, he will get tb< most for his bomb money--the greatest tola) value .aelmed by the circles of destruction. If you make this study on the map of any large city, fra will ot once that no sensible enemy would attempt "opine destruction of e major city with atom bombs. would be suicidal--would waste most of his precious ^?hs on low-priority commercial, industrial and rcsi. M district*. He would aim, rather, to wipe out certain ftfuUy selected 4-jquare-milo circles, certain limited of major importance to him. So much (or atom bombs. Now (or the question on ^body's lips, "What about the H*bornbs, particularly H-supcrbombs?** The answer is that they may be less ` ASSIl 193J To lest this atolement consider the largest H-bomb any* body has yet had the nerve <0 suggest, one of 1000 power, equaling 20,000,000 tons of TNT. This bomb would be nowhere near 1000 times as destructive--In fact, only 100 times as destructive, ainco area destroyed goes up as the square ot the cube root of the bomb's power. Thus the ores of its circle of destruction would be 400 square miles (a 22-mile circle), not 4000. The standard atom bomb is ten times as efficient as this super U-bomb in applying the energy it releases to destroy area. Even that is only half the story. Having achieved a certain area of destruction with this very low efficiency, the big bomb can't find a suitable target anywhere In the World. fFhcre can you find a 4O0squarc-mUe circle solid jull of number-t strategic target material? Combining these two inefficiencies you'd generally find that about ten "model-T" atom bombs, property placed, could accomplish os much of military value os 0 single 1000-power H-bomb. TOere isn't room here to discuss other important angles, such os the reduced number of planes required by the bigger bombs and the reduced need (or bombing accuracy. After making all allowances for such (actors that may somewhat favor the larger bombs, the conclusion is un avoidable that the nuclear explosive needed (or a 1000power H-bomb would do far more damage to an enemy if divided among a fair number of less powerful H-bombs. You don't use 0 sledge hammer to kill a few fleas. And perhaps even the ordinary A-bombs may be the most economical in many cases. We hope Pqwcr feeders will pardon ell this cold* bloodod arithmetic. We are fully aware 0! the human implications of the bomba, and very much concerned. But we do feci that all of us, as engineers, must first un derstand the nature of otomte weapons if our opinions regarding their use are to be worth o whoop. IBS CUT..... .. 69