Word: warping
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Dates: during 1900-1909
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...kinds: transverse and fore and aft. The aeroplane in mid-air has two forces acting on it besides that of gravity, a tendency to turn over sideways and a tendency to pitch either backward or forward. To counteract the former, and thus gain transverse stability, the Wrights warp the ends of their planes in such a way as to apply a downward force on the elevated side. To minimize the danger of pitching forward and thus gain fore and aft stability, the horizontal rudder, rigged either in front or behind the machine, is the most effective method which...
...through large, carelessly made holes, to cardboard mounts, and the wire is then fastened at the front or back of the card, as convenience dictates. The difference between the two methods is great. The plaster mounts, aside from the matter of looks have two distinct advantages; they will not warp, and thus endanger breaking the glass models; and they may be readily cleaned, with a wet cloth or sponge, while the surface of the cardboard is spoiled by an attempt at cleaning...
...some-time been in progress at the University Museum to discover a better sort of tablet than is now used upon which the glass models of flowers may rest with safety. The results have been satisfactory. The new tablets are made of a white material which will not warp under any conditions. The surface is absolutely smooth and may be made to take any color: white, however, will probably be used entirely. The chief value of this invention lies in the fact that where flowers were formerly subject to serious damage by the warping of the cardboard upon which they...