Word: inlet
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Dates: during 1960-1969
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Perched on the rugged shore of Cook Inlet, the remote Alaskan community of Tyonek might well pass for an upper-middle-class Midwestern suburb. Its 60 houses (average price: $25,000), all equipped with modern appliances and television, stand along winding, tree-lined streets. It has a glistening commu nity hall, its own airstrip and guest house. Construction is under way on a modern $737,000 schoolhouse; in the works are a power plant, fire station and store. Yet Tyonek's conspicuous prosperity is a remarkably recent phenomenon: until the last year or so, the Athabasca Indians who largely...
...operate, it must first be accelerated to a speed of several hundred miles per hour by an auxiliary turbojet or rocket engine, or get a lift from a conventional plane. After that, enough air is rammed into the engine's front inlet to set up a pressure barrier that forces the burning gases to escape at the rear, thus providing thrust (see diagram...
...unlimited velocities, but its top speed is limited to about 4,000 m.p.h. by practical considerations. The jet flame, burning conventional fuels, tends to blow out at supersonic flight speeds (above 720 m.p.h. at low altitudes). If it is to keep burning and providing thrust, the ramjet needs an inlet shape to generate its own shock wave, which will slow passage of air through the combustion chamber to a subsonic flow. Above 4,000 m.p.h., however such an inlet design could cause excessive temperatures and pressures in the combustion chamber, and thrust wouk be drastically reduced...
...convincingly demonstrated a practical method of maintaining combustion in a supersonic flow of air. Using hydrogen, which has a low ignition temperature, burns rapidly and provides high thrust, they kept an experimental scramjet burning in air moving as fast as 7,000 m.p.h. By redesigning their engine's inlet to allow it to gulp air at supersonic speeds, they were also able to eliminate the excessive temperatures and pressures. And they proved that useful thrust could be produced at flight speeds in excess of 17,000 m.p.h...
More of Everything. He should have gone to Pinas Bay. An isolated jungle inlet, 150 miles southeast of Panama City, Pinas (or Pineapple) Bay is the world's hottest marlin ground, better than Peru, better than New Zealand, Hawaii or the Bahamas. There, swarming around a bait-packed barrier reef seven miles offshore, are more different kinds of billfish, and more of each, than anybody has ever seen before: big Pacific sailfish in such profusion that fishermen consider them a nuisance, literally thousands of blue marlin, silver marlin, striped marlin and the lordly blacks...