Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on AëronauticsD. Appleton, 1885 - 264 páginas |
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Página 15
... blade of an ordinary screw- propeller . That those organs are screws functionally , from their twist- ing and untwisting , and from their rotating in the direction of their length , when they are made to oscillate . That they have a ...
... blade of an ordinary screw- propeller . That those organs are screws functionally , from their twist- ing and untwisting , and from their rotating in the direction of their length , when they are made to oscillate . That they have a ...
Página 108
... blade of a screw . The artificial wing represented at fig . 53 ( p . 107 ) does the same , cd twisting round a b , and g h round e f . The natural and arti- ficial wings , when elevated and depressed , describe a figure - of - 8 track ...
... blade of a screw . The artificial wing represented at fig . 53 ( p . 107 ) does the same , cd twisting round a b , and g h round e f . The natural and arti- ficial wings , when elevated and depressed , describe a figure - of - 8 track ...
Página 143
... blade of an ordinary screw pro- peller as employed in navigation . Thus the general outline of the wing corresponds closely with the outline of the blade of the propeller , and the track described by the wing in space is twisted upon ...
... blade of an ordinary screw pro- peller as employed in navigation . Thus the general outline of the wing corresponds closely with the outline of the blade of the propeller , and the track described by the wing in space is twisted upon ...
Página 151
... blade of the ordinary screw the integral parts are rigid and unyielding , whereas , in the blade of the screw formed by ... blades follow each other PROGRESSION IN OR THROUGH THE AIR . 151 Points wherein the screws formed by the wings ...
... blade of the ordinary screw the integral parts are rigid and unyielding , whereas , in the blade of the screw formed by ... blades follow each other PROGRESSION IN OR THROUGH THE AIR . 151 Points wherein the screws formed by the wings ...
Página 153
... blades ; the blades and the water revolving as a solid mass . Under these circumstances , the propelling power of the screw is diminished rather than increased . It is quite otherwise with the screws formed by the wings ; these ...
... blades ; the blades and the water revolving as a solid mass . Under these circumstances , the propelling power of the screw is diminished rather than increased . It is quite otherwise with the screws formed by the wings ; these ...
Outras edições - Ver tudo
Animal Locomotion: Or Walking, Swimming, and Flying, with a Dissertation on ... James Bell Pettigrew Visualização integral - 1882 |
Animal Locomotion, Or, Walking, Swimming, and Flying: With a Dissertation on ... James Bell Pettigrew Visualização integral - 1874 |
Animal Locomotion: Or, Walking, Swimming and Flying, with a Dissertation on ... James Bell Pettigrew Visualização integral - 1893 |
Palavras e frases frequentes
action aërial albatross angle animals arms and legs arrangement artificial wave artificial wing ascends backwards bat and bird biped blades body bones Borelli Compare with fig concave convex depressed described downward dugong effective stroke elastic ligaments elbow-joint elevating and propelling ellipse elytra extended feet fins fish flexed flexible flexion flight flying foot force gannet glide horizontal direction humerus inclined planes increased insect insect wing joint kite less levers limbs locomotion long axis manner Marey motion move movements muscles muscular muscular system natural wing nervures oblique oscillate pectoral pectoral fins pinion porpoise portion position posterior margin posterior or thin produced quadruped rapidity remarkable resistance reverse root rotation sail screw sea-bear shoulder-joint side speed spiral swimming tail thick margin tion travelling surfaces trunk twisting universal joint upward direction upwards and forwards velocity vertical vertical direction vibrate walking waved track weight wing descends