Word: rotors
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...center of Bölkow's operation is its Ottobrunn idea factory, a closely guarded cluster of buildings in a dense forest outside Munich. From it has come such hardware as an experimental helicopter whose swiveling rotor blades will enable it to fly at a record 310 m.p.h., a heavy-duty rotor system that jets exhaust gases through the tips of hollow blades, and the VJ 101 vertical-takeoff fighter plane. With such help as he will get from Boeing, Ludwig Bölkow fully expects to help make Germany once again a major competitor in the world...
...technique was first used for examining welds and joints in everything from bridges to nuclear submarines. Then Technical Operations, Inc. of Burlington, Mass, helped Eastern solve the problem of getting radiographic equipment into the hollow rotor shaft of jet engines by using a 100-curie capsule of iridium 192 that is as small as a pencil eraser but emits gamma radiation powerful enough to pierce the engine's metal innards...
...tiny radiation source is cranked 6 ft. into the shaft. A strip of industrial X-ray film wound around the engine is bombarded by the gamma rays streaming out from the isotope. The result is a detailed X-ray photograph of the hundreds of tough-to-get-at rotor blades that suck air into the engine, compress it and feed it to the combustion chambers...
What isotopic inspection does best is provide a clear picture of the rotor blades deepest inside the engine. These blades are the first to loosen and break free, and when this happens it may mean a complete engine overhaul at a price of $25,000 or more. "Using the isotopic inspection method," says Eastern's System Director of Quality Control Jason Koesy, "we've already caught 14 rotor blades that had begun to work their way loose." Isotopic inspection, which costs as little as five hours and $20 per engine, has already saved Eastern more than...
...bowl-shaped antenna pointed straight up. Above it floated an object that looked for all the world like a small, square bedspring with a tiny helicopter attached. The rotor blades whirled with a thin whine, and the helicopter strained at the guy wires that kept it from climbing more than 50 ft. There it hovered, its blades spinning sturdily, drawing their power out of invisible microwaves shooting up from below. This was Raytheon Co.'s first public demonstration of an aircraft powered solely by radio energy...