 | Agriculture - 1811 - 558 pages
...decreases, these centres approach, and coincide when the current becomes perpendicular to the sail. Hence any heel of the machine backward or forward,...in length to the distance the centre has removed." From a variety of experiments which the author has made on this subject, he conceives that a rudder,... | |
 | 1812 - 696 pages
...coincide when the current becomes perpendicular to the sail. Hence any heel of the machine hackward or forward, removes the centre of support behind or...position by a power, equal to the whole weight of the machme, acting upon a lever equal in length to the distance the centre has removed." From a variety... | |
 | Aeronautical Society of Great Britain - Aeronautics - 1866 - 168 pages
...the current becomes perpendicular to the plane, hence any heel of the machine backwards or forwards removes the centre of support behind or before the point of suspension.' " From this discovery, it seems remarkable that Sir George Cayley, finding that at high speeds with... | |
 | James Bell Pettigrew - Aeronautics - 1873 - 376 pages
...the current becomes perpendicular to the plane ; hence any heel of the machine backwards or forwards removes the centre of support behind or before the point of suspension." — Nicholson's Journal, vol. xxv. p. 83. When the speed attained by the bird is greatly accelerated,... | |
 | Industrial arts - 1881 - 648 pages
...the current becomes perpendicular to the plane, hence any heel of the machine backwards or forwards removes the centre of support behind or before the point of suspension.' "From this discovery, it seems remarkable that Sir George Cayley, finding that at high speeds with... | |
 | Aeronautical Society of Great Britain - Aeronautics - 1871 - 588 pages
...current decreases these centres approach and coincide when the current becomes perpendicular to the sail. Hence any heel of the machine backward or forward...in length to the distance the centre has removed. To render the machine perfectly steady, and likewise to enable it to ascend and descend in its path,... | |
 | James Means - Aeronautics - 1894 - 224 pages
...the current becomes perpendicular to the plane, hence any heel of the machine backwards or forwards removes the centre of support behind or before the point of suspension.' " From this discovery, it seems remarkable that Sir George Cayley, finding that at high speeds with... | |
 | Herbert Chatley - Aeronautics - 1907 - 142 pages
...the current becomes perpendicular to the plane : hence any heel of the machine backwards or forwards removes the centre of support behind or before the point of suspension. " I referred to this in the last chapter, and gave a value for the displacement. This is a consideration... | |
 | James Bell Pettigrew - Biology - 1908 - 370 pages
...current becomes i>er]>cndicular to the plane ; hence any heel of the nwchinf Iwckwards or forwards removes the centre of support behind or before the point of suspension " (Nicholson's Journal, vol. xxv. p. 83). When thspeed attained by the bird is greatly accelerated,... | |
 | Aeronautics - 1909 - 196 pages
...current decreases these centres approach and coincide when the current becomes perpendicular to the sail. Hence, any heel of the machine backward or forward...lever equal in length to the distance the centre has moved. To render the machine perfectly steady and to enable it to ascend and descend in its path it... | |
| |
... sail does not coincide with the centre of its surface, but is considerably in front of it. As the obliquity of the current decreases these centres approach and coincide when the current becomes perpendicular to the sail. Hence any heel of the machine... 
