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" Let ab be a section of the plane of both wings opposing the horizontal current of air (created by its own motion), which may be represented by the line cd, and is the measure of the velocity of the bird. The angle bdc can be increased at the will of the... "
A Journal of Natural Philosophy, Chemistry and the Arts - 167. oldal
szerző: William Nicholson - 1809
Teljes nézet - Információ erről a könyvről

Annual Report of the Aeronautical Society of Great Britain

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...

The Aeronautical Annual ...: Devoted to the Encouragement of Experiment with ...

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...

Epitome of the Aeronautical Annual

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...

Aerial Navigation

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...

Progress in Flying Machines

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...
Korlátozott előnézet - Információ erről a könyvről

The Wind and Beyond: The ascent of the airplane

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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