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In 1768 Paucton conceived the idea of an apparatus with two screws, suspensive and propulsive. In 1781 Meerwein, the architect of the Prince of Baden, built an orthopteric machine, and protested against the tendency of the aerostats which had just been invented. In 1784 Launoy and Bienvenu had maneuvered a helicopter worked by springs.

Their father, a clergyman and later a bishop, spent his leisure in scientific reading and in the invention of a typewriter which, however, he never perfected. He inspired an interest in scientific principles in his boys' minds by giving them toys which would stimulate their curiosity. One of these toys was a helicopter, or Cayley's Top, which would rise and flutter awhile in the air.

Picking up an auto-carbine, he slung it and stepped out of the helicopter, Altamont behind him. They advanced to meet the party from the church, halting when they were about twenty feet apart. "I must apologize, lieutenant, for dropping in on you so unceremoniously." Loudons stopped, wondering if the man with the white beard understood a word of what he was saying.

There was a supply-plane on the runway, but the helicopter belonged at the base. He found himself excessively conscientious in his check-over. Though he hated to admit it, he knew it was because Gail would be in the plane. When he headed back toward the main building one of the geophysics gang beckoned to him.

He had no right to believe that he alone knew the best way of handling the enemy. Biting on the sourness of that realization, he lay quietly with the others, watching the riders enter the foothills perhaps a quarter of a mile to the west. The helicopter was circling now over the men riding into a cut between two rises.

Edison has always taken a keen interest in aerial flight, and has also experimented with aeroplanes, his preference inclining to the helicopter type, as noted in the newspapers and periodicals from time to time.

It'll be a lot safer for Miss Holmes if you send a helicopter there to pick her up." The reply was somehow military in tone. It sounded like a civilian being authoritative about something he knew nothing about. Lockley said, "Over" in a dry tone and put down the microphone. He picked up the pocket radio and put it in his pocket. It might be useful.

But he was sure that withdrawal now would only postpone trouble. Sooner or later the Apaches would have to stand against the Reds, and if they could do it now while the enemy was occupied with trouble from the Tatars, so much the better. Jil-Lee was following Nolan. But something in Travis rebelled. He watched the circling helicopter.

The doctrine thus set forth might appear plausible, but it is based on the common misconception that all the force which might be put into the helicopter or 'pterophore' would be utilised for lifting or propelling the vehicle through the air, just as a propeller uses all its power to drive a ship through water.

"I'll organize a search right away. Where are you calling from?" "Police headquarters at Sandbank." "Okay. Take it easy, and I'll send a whirlybird to pick you up," Tom promised. "And don't forget some clothes," Bud added with a chuckle. "Mel and I are getting chilly." "Right!" Tom hung up and gave Arv Hanson a quick briefing. Then he phoned the base airfield to dispatch a helicopter.