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Άλλες εκδόσεις - Προβολή όλων
The Romance of Aeronautics: An Interesting Account of the Growth ...
Charles Cyril Turner
Προβολή αποσπασμάτων - 1912
accident adventures aerial navigation aeroplane aerostat airship altitude Andree angle apparatus ascended attempt aviation meeting aviator ballast balloonist became began biplane bird Bleriot Blon Brothers Captain carried caused centre CHAPTER contrivance cylinder danger Delagrange descend direction dirigible balloon distance driven earth effect engine envelope escape experiments famous flew flying machine France French Gabriel Voisin gas-envelope gliding Gnome Gnome motor Grahame-White ground guide-rope gust height Henry Farman hill horizontal idea inventor journey killed kite land later Leon Delagrange Lilienthal London Louis Bleriot mechanical flight miles per hour minutes monoplane Montgolfier occasion Orville Wright parachute Paris passengers Paulhan petrol Pilcher piston planes possible prize propeller realised remarkable rising rope rudder sailing Santos-Dumont seen sensation side Simplon Pass soaring soon speed square feet surface tail tion took turn upwards velocity vessel Voisin voyage Wilbur Wright wind wings Wright Brothers Zeppelin
Σελίδα 173 - It would not be considered at all safe for a bicycle rider to attempt to ride through a crowded city street after only five hours...
Σελίδα 172 - The balancing of a gliding or flying machine is very simple in theory. It merely consists in causing the center of pressure to coincide with the center of gravity. But in actual practice there seems to be an almost boundless incompatibility of temper which prevents their remaining peaceably together for a single instant, so that the operator, who in this case acts as peacemaker, often suffers injury to himself while attempting to bring them together.
Σελίδα 182 - Hawk we began a series of experiments to accurately determine the amount and direction of the pressure produced on curved surfaces when acted upon by winds at the various angles from zero to 90 degrees.
Σελίδα 171 - ... the engineer as well. Men also know how to build engines and screws of sufficient lightness and power to drive these planes at sustaining speed. Inability to balance and steer still confronts students of the flying problem, although nearly ten years 1 have passed. When this one feature has been worked out, the age of flying machines will have arrived, for all other difficulties are of minor importance.
Σελίδα 171 - The difficulties which obstruct the pathway to success in flying-machine construction are of three general classes: (1) Those which relate to the construction of the sustaining wings ; (2) those which relate to the generation and application of the power required to drive the machine through the air; (3) those relating to the balancing and steering of the machine after it is actually in flight.
Σελίδα 181 - We had taken up aeronautics merely as a sport. We reluctantly entered upon the scientific side of it. But we soon found the work so fascinating that we were drawn into it deeper and deeper.
Σελίδα 196 - When preparations had been completed a wind of only three or four miles was blowing — insufficient for starting on so short a track — but since many had come a long way to see the machine in action, an attempt was made. To add to the other difficulty, the engine refused to work properly. The machine, after running the length of the track, slid off the end without rising into the air at all. Several of the newspaper men returned the next day, but were again disappointed. The engine performed badly,...
Σελίδα 172 - Now there are only two ways of learning to ride a fractious horse: one is to get on him and learn by actual practice how each motion and trick may be best met; the other is to sit on a fence and watch the beast...
Σελίδα 173 - With these conditions, a rope attached to keep it from floating backwards would answer very nearly the same purpose as a propeller driven by a motor, and it would be possible to practice by the hour, and without any serious danger, as it would not be necessary to rise far from the ground, and the machine would not have any forward motion at all.
Σελίδα 178 - ... of pressure; (4) that steering up and down can be attained with a rudder, without moving the position of the operator's body; (5) that twisting the wings so as to present their ends to the wind at different angles is a more prompt and efficient way of maintaining lateral equilibrium than shifting the body of the operator.