Word: propellor
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...them stumped up at the Architectural School. They say that Gropius can't understand it. It's a notched hard wood stick, with a nail stuck in the end and on the nail a propellor. You hold the stick in either hand and with the other rub a second stick, any shape, across the notches...
Round and round goes the propellor. When a finger of the rubbing hand is in one position, the propellor goes one way, when in another, the other...
Former meteorographs have carried a clock or propellor to operate the instrument, as was recently described in the CRIMSON. The difficulty lay in making a clock cheap enough to be lost after every ascension and in finding an efficient propellor. This instrument carries, however, simply a screw thread whose grooves are filled with an insulating material. On this bears a contact attached to an evacuated box such as is used in an ordinary aneroid barometer. Every time the contact crosses a thread, a corresponding interruption occurs in the radio signal. This signal was received on a rotating drum. The distance...
...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...