United States or Bosnia and Herzegovina ? Vote for the TOP Country of the Week !
After these antics, I decreased the extent of the possible change in the form of wing-surface, so as to allow only straight sailing or only long curves in turning. 'During my work I had a few carping critics that I silenced by this standing offer: If they would deposit a thousand dollars I would cover it on this proposition.
Carl watched them start, bobbed his chin to the music of the motor, saw the machine canter down the field and ascend from dawn to the glory of day. The rising sun picked out the lines of the uninclosed framework and hovered on the silvery wing-surface. The machine circled the field at two hundred feet elevation, smoothly, peacefully. And peace beyond understanding came to Carl.
The wing-surface of the common swallow is rather more than in the ratio of two square feet per pound, but having also great length of pinion, it is both swift and enduring in its flight. When on a rapid course this bird is in the habit of furling its wings into a narrow compass.
It seemed to have no wings at all. But then, in one instant, a vast wing-surface flashed out, made a single gigantic flap and the thing was a projectile again, darting through a cheraux-de-frise of interlaced fronds without a sign of wings to support it. Tommy inspected his surroundings with an infinite care.
The greater extent of surface is probably needful for the continual variations of speed and instant stoppages for obtaining its insect food. 'On the other hand, there are some birds, particularly of the duck tribe, whose wing-surface but little exceeds half a square foot, or seventy-two inches per pound, yet they may be classed among the strongest and swiftest of fliers.
'It is a remarkable fact how this proportion of wing-surface to weight extends throughout a great variety of the flying portion of the animal kingdom, even down to hornets, bees, and other insects. In some instances, however, as in the gallinaceous tribe, including pheasants, this area is somewhat exceeded, but they are known to be very poor fliers.
Word Of The Day