 | Aeronautical Society of Great Britain - 1866 - Страниц: 168
...one pound, suspended from an area of this extent, would acquire a velocity due to a fall of sixteen feet — a height sufficient for the destruction or...descent, as a parachute, the sustaining effect will be much the same, whatever the figure of the outline of the superficies may be, and a circle perhaps... | |
 | Aeronautical Society of Great Britain - 1877 - Страниц: 556
...Wenham made some remarks, an extract from which may be interesting to your readers, as follows : — " 'In the case of perpendicular descent, as a parachute, the sustaining effect will be much the same whatever the figure of the outline of the superficies may be, and a circle perhaps... | |
 | 1867 - Страниц: 552
...horizontal motion with a perpendicular one is of the greatest importance ; and Mr. Wenham observes, " In the case of perpendicular descent, as a parachute, the sustaining effect will be much the same, whatever the figure of the outline of the superficies may be, and a circle affords,... | |
 | 1881 - Страниц: 648
...one pound, suspended from an area of this extent, would acquire a velocity due to a fall of sixteen feet — a height sufficient for the destruction or...influenced by the form and arrangement of the surface. lu the case of perpendicular descent, os a parachute, the sustaining effect will be much the same,... | |
 | Nicholas Patrick Wiseman - 1890 - Страниц: 546
...safety. This combination of a horizontal motion with a perpendicular one is of the greatest importance. In the case of perpendicular descent, as a parachute, the sustaining effect will be much the same, whatever the figure of the outline of the superfices may be, and a circle affords,... | |
 | James Means - 1894 - Страниц: 224
...weight of one pound, suspended from an area of this extent, would acquire a velocity due to a fall of 16 feet — a height sufficient for the destruction or...descent, as a parachute, the sustaining effect will be much the same, whatever the figure of the outline of the superficies may be, and a circle perhaps... | |
 | 1894 - Страниц: 642
...of one pound, suspended from an area of this extent, would acquire a velocity due to a fall of 1 6 feet — a height sufficient for the destruction or...flight, the sustaining power is greatly influenced by tlie form and arrangement of the surface. In the case of perpendicular descent, as a parachute, the... | |
 | 1888 - Страниц: 642
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 | James Means - 1910 - Страниц: 272
...weight of one pound, suspended from an area of this extent, would acquire a velocity due to a fall of 16 feet — a height sufficient for the destruction or...descent, as a parachute, the sustaining effect will be much the same, whatever the figure of the outline of the superficies may be, and a circle perhaps... | |
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... feet — a height sufficient for the destruction or injury of most animals. But when the plane is urged forward horizontally, in a manner analogous to the wings of a bird during flight, the sustaining power is greatly influenced by the form and arrangement... 
