 Having remarked how thin a stratum of air is displaced beneath the wings of a bird in rapid flight, it follows that in order to obtain the necessary length of plane for supporting heavy weights, the surfaces may be superposed, or placed in parallel rows,...  The Aeronautical Annual - Pàgina 106editat per - 1894Visualització completa - Sobre aquest llibre
 | 1892 - 610 pàgines
...wings of a bird in rapid flight, it follows that in order to obtain the necessary length of plane for supporting heavy weights, the surfaces may be superposed...may be supported in a transverse distance of only ю ft. In order to test this idea, six bands of stiff paper 3 ft. long and 3 in. wide were stretched... | |
 | Aeronautical Society of Great Britain - 1866 - 168 pàgines
...wings of a bird in rapid flight, it follows that in order to obtain the necessary length of plane for supporting heavy weights, the surfaces may be superposed,...if framed together ; and it is thus shown how two hundredweight may be supported in a transverse distance of only ten feet. In order to test this idea,... | |
 | Aeronautical Society of Great Britain - 1877 - 556 pàgines
...wings of a bird in rapid flight, it follows that, in order to obtain the necessary length of plane for supporting heavy weights, the surfaces may be superposed,...dozen pelicans may fly one above the other without material impediment, as if framed together ; and it is thus shown how two hundredweight may be supported... | |
 | Aeronautical Society of Great Britain - 1883 - 488 pàgines
...follows, that in order to obtain the necessary length of plane for supporting heavy weights, the surface may be superposed, or placed in parallel rows with...interval between them. A dozen pelicans may fly one above another without mutual impediment, as if framed together ; and it is thus shown how two hundred- weight... | |
 | 1867 - 552 pàgines
...wings of a bird in rapid flight, it follows, that in order to obtain the necessary length of plane for supporting heavy weights, the surfaces may be superposed,...interval between them. A dozen pelicans may fly one above another without mutual impediment, as if framed together ; and it is thus shown how two hundred weights... | |
 | James Samuelson, Henry Lawson, William Sweetland Dallas - 1869 - 506 pàgines
...wings of a bird in rapid flight, it follows, that in order to obtain the necessary length of plane for supporting heavy weights, the surfaces may be superposed,...if framed together ; and it is thus shown, how two hundredweight may be supported in a transverse distance of only ten feet." Mr. Stringfellow eagerly... | |
 | James Samuelson, Henry Lawson, William Sweetland Dallas - 1869 - 510 pàgines
...in order to obtain the necessary length of plane for supporting heavy weights, the surfaces may t,e superposed, or placed in parallel rows, with an interval...if framed together ; and it is thus shown, how two hundredweight may be supported in a transverse distance of only ten feet." Mr. Stringfellow eagerly... | |
 | 1881 - 648 pàgines
...follows that in order to obtain the necessary length of plane for supporting heavy weights, the surface may be superposed, or placed in parallel rows, with...if framed together ; and it is thus shown how two hundredweight may be supported in a transverse distance of only ten feet. In orderto test this idea,... | |
 | Nicholas Patrick Wiseman - 1890 - 546 pàgines
...of a bird in rapid flight, and it follows that, in order to obtain the necessary length of plane for supporting heavy weights, the surfaces may be superposed,...interval between them. A dozen pelicans may fly one above another without mutual impediment, as if framed together; and it is thus shown how two hundred weights... | |
 | Octave Chanute - 1894 - 330 pàgines
...wings of a bird in rapid flight, it follows that in order to obtain the necessary length of plane for supporting heavy weights, the surfaces may be superposed...with an interval between them. A dozen pelicans may ifly, one above the other, without mutual impediment, as if framed together ; and it is thus shown... | |
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