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It is always claimed for a machine of this type that it possesses great advantages both in rising and in landing, since, if it were effective, it would obviously be able to rise from and alight on any ground capable of containing its own bulk; a further advantage claimed is that the helicopter would be able to remain stationary in the air, maintaining itself in any position by the vertical lift of its propeller.
But they needed to rid themselves of that spying flyer before they dared to move out into the plain. And to use the destruction of the helicopter as an example, would be the best proof he could give of the invincibility of the new Apache arms. "Under the right conditions," he replied stoutly, "yes." "And those conditions?" Menlik demanded. "That it must be brought within range.
There is not a flying-officer in the world who will not agree. An interesting series of experiments has been carried out in England on what has been known as the helicopter machine. This machine is not dependent upon speed to fly, but merely on engine power applied through a propeller of great pitch.
Loudons was taking the big helicopter upstairs, for a better view. Now and then, among the trees, there would be a glint of glassy slag, usually in a fairly small circle.
"Eh bien " murmured Leclair, noncommittally. "Well, can we make it, sir?" The ace inspected the vacuum-gauges, the helicopter tachometers, and shrugged his shoulders. "'Fais tout, toi-même, et Dieu t'aidera," he quoted the cynical old French proverb. "If nothing gives way, there is a chance."
We'll be there in a few minutes." "Loudons is bringing the helicopter," Altamont told the others. "All we have to do is to hold on, here, until he comes." A naked savage raised his head from behind what might, two hundred years ago, have been a cement park-bench and he was only a hundred yards away. Reader Rawson promptly killed him and began reloading. "I think you're right, Tenant," he said.
Throughout the whole history of flight up to the outbreak of the European war development has been handicapped on the score of finance, and, since the arrival of the aeroplane, both ornithopter and helicopter schools have been handicapped by this consideration.
He turned away and led Graham to his helicopter. As Graham settled in the seat, he turned to the sector leader. "He just couldn't use it properly," he remarked. "Maybe only certain people can use them." Bond nodded as he started the motor. "Or maybe only certain people can't." He busied himself in getting the machine up through the landing slot, then turned as they climbed into the night sky.
De la Landelle's principal achievement consisted in the publication in 1863 of a book entitled Aviation which has a certain historical value; he got out several designs for large machines on the helicopter principle, but did little more until the three combined in the attempt to raise funds for the construction of their full-sized machine.
It was a cry that shrieked in his mind, reverberated in his mind, touching nothing around him, touching not the silent corridor. Maya! Dark's mind went out to her, rode up on swift wings to the room above where she had waited for his return. He was there, in that room, and there was the helicopter. There was no Maya there. But there were figures in the copter, moving.
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