| Aeronautical Society of Great Britain - 1871 - 586 oldal
...the line etl. and is the measure of the velocity of the bird. The angle bdc can be increased at the will of the bird, and to preserve a perfectly horizontal...of the wings may be truly represented by the angle bdc. Draw de perpendicular to the plane of the wings, produce the line cd as far as required, and from... | |
| 1894 - 642 oldal
...the line cd, and is the meastire of the velocity of the bird. The angle bdc can be increased at the will of the bird, and to preserve a perfectly horizontal...the wings may be truly represented by the angle bd c. Draw de perpendicular to the plane of the wings, produce the line ed as far as required, and from... | |
| James Means - 1910 - 272 oldal
...represents a bird in this act. ure of the velocity of the bird. The angle bdc can be increased at the will of the bird, and to preserve a perfectly horizontal...the wings may be truly represented by the angle bd c. Draw de perpendicular to the plane of the wings, produce the line ed as far as required, and from... | |
| Sir George Cayley, Bart - 1910 - 114 oldal
...the line cd, and is the measure of the velocity of the bird. The angle bdc can be increased at the will of the bird, and to preserve a perfectly horizontal...of the wings may be truly represented by the angle bdc. Draw de perpendicular to the plane of the wings, produce the line cd as far as required, and from... | |
| Octave Chanute - 1997 - 340 oldal
...hird, and to preserve a perfectly horizontal path, without the wing heing waved, must continually he increased in a complete ratio (useless at present...enter into), till the motion is stopped altogether ; hut at one given time the position of the wings may he truly represented hy the angle BD C. Draw... | |
| 2003 - 776 oldal
...the line cd, and is the measure of the velocity of the bird. The angle bdc can be increased at the will of the bird, and to preserve a perfectly horizontal...the wings may be truly represented by the angle bd c. Draw de perpendicular to the plane of the wings, produce the line ed as far as required, and from... | |
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