Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on AëronauticsH. S. King & Company, 1873 - 264 páginas |
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Página 109
... causing the root of the wing to travel in the direction m a , the body and tip travelling in the direction i b . During the reverse stroke , the wing flies upwards in a double curve , kite - fashion , and elevates the weight k The more ...
... causing the root of the wing to travel in the direction m a , the body and tip travelling in the direction i b . During the reverse stroke , the wing flies upwards in a double curve , kite - fashion , and elevates the weight k The more ...
Página 110
... causing weights acting over pulleys to operate upon the root of the wing ( a or e ) , and watching how far the weights ( k or ) are raised . In these calculations allowance is of course to be made for friction . The object of the two ...
... causing weights acting over pulleys to operate upon the root of the wing ( a or e ) , and watching how far the weights ( k or ) are raised . In these calculations allowance is of course to be made for friction . The object of the two ...
Página 123
... causing the sound , is proved by the fact , that in slow - flying insects and birds no note is pro- duced ; whereas in those which urge the wing at a high speed , a note is elicited which corresponds within certain limits to the number ...
... causing the sound , is proved by the fact , that in slow - flying insects and birds no note is pro- duced ; whereas in those which urge the wing at a high speed , a note is elicited which corresponds within certain limits to the number ...
Página 137
... causing the wing , when fully extended and presenting its maximum of surface , to resume its position of rest and plane of least resistance . The principal effort required in flight is , therefore , made during extension , and at the ...
... causing the wing , when fully extended and presenting its maximum of surface , to resume its position of rest and plane of least resistance . The principal effort required in flight is , therefore , made during extension , and at the ...
Página 152
... causing them to reciprocate , a double result is produced , since the blades always act upon independent columns of air , and in no instance overlap or double upon each other . The advantages possessed by this 1 Of this circle , the ...
... causing them to reciprocate , a double result is produced , since the blades always act upon independent columns of air , and in no instance overlap or double upon each other . The advantages possessed by this 1 Of this circle , the ...
Outras edições - Ver tudo
Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on ... James Bell Pettigrew Visualização integral - 1873 |
Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on ... James Bell Pettigrew Visualização integral - 1883 |
Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on ... James Bell Pettigrew Pré-visualização indisponível - 2016 |
Palavras e frases frequentes
action aërial animals arms and legs arrangement artificial wave artificial wing ascends axes backwards bat and bird beetle biting surface blades body bones Borelli Compare with fig concave convex coracoid Crown 8vo depressed described downward dugong elastic ligaments elbow-joint elevating and propelling ellipse elytra extension extremities feet fins fish flexed flexible flexion flight flying foot gannet horizontal direction humerus inclined planes increased insect insect wing joint kite less lever limbs long axis manner Marey membranous motion move movements muscles muscular natural wing nervures oblique oscillate pectoral fins pinion porpoise portions position posterior margin posterior or thin primary produced quadruped rapid reciprocating Red-legged Partridge remarkable resistance root rotating scapula screw secondary feathers shoulder-joint side spiral swimming tail thick margin tion trunk twisting universal joint upward direction upwards and forwards velocity vertical vertical direction vibrate walking wave wing waved track weight wing descends
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