Word: propellors
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Dates: during 1920-1929
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...experienced pilot, realized that either he was out of gas, or the gas feed line was broken, and headed towards Soldiers Field. Falling rapidly the plane skimmed two trees, approached the field where the band was practicing, and bounced on the ground, smashing the landing gear, propellor, and lower wings...
...with the forces by which Earth clutches that which is its own. To escape the pull of gravity, an earthborn body would have to take off at terrific speed. Outside the earthly atmosphere, interstellar gases are so rare that they would afford no traction for an airplane's propellor, no buoyance for wings. Most scientists with lunar leanings have therefore pondered shooting themselves moonwards in rockets. Herr Oberth, bearing in mind the desirability of returning and landing on the earth, cogitated combining plane and rocket, using the latter for propulsion of the former as has been done experimentally...
...Bordeaux. He also conducted personally numerous researches on the application of submarine acoustics and made notable discoveries in connection with the effect of sound upon opaque materials, the shape of horns for acoustic instruments, the assembling of receptive membranes and marine microphones, as well as the first oscillographs of propellor vibrations. He is also responsible for an important study of musical acoustics, the significance of which led the French government to commend him and recommend his pursuance of the subject...
Because of a defective bolt in the propellor, the new boat, which has been christened the "Pip", has been drawn up on the float during the past few days, but it will probably be put in the water today...