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2. Ray-Ban - Wikipedia

   en.wikipedia.org/wiki/Ray-Ban

   Website. ray-ban .com. Ray-Ban is a brand of luxury sunglasses and eyeglasses created in 1936 by Bausch & Lomb. The brand is best known for its Wayfarer and Aviator lines of sunglasses. In 1999, Bausch & Lomb sold the brand to Italian eyewear conglomerate Luxottica Group for a reported $640 million. [ 1][ 2]

3. Arado Ar 234 - Wikipedia

   en.wikipedia.org/wiki/Arado_Ar_234

   The Arado Ar 234 Blitz (English: lightning) is a jet-powered bomber designed and produced by the German aircraft manufacturer Arado. It was the world's first operational turbojet -powered bomber, seeing service during the final years of the Second World War . Development of the Ar 234 can be traced back to the latter half of 1940 and the ...

4. Motorjet - Wikipedia

   en.wikipedia.org/wiki/Motorjet

   The term "motor jet" was established in a patent filed in Britain by J.H. Harris of Esher, U.K., in 1917. It was next explored by Secondo Campini in the early 1930s, although it was not until 1940 that an aircraft, the Caproni Campini N.1 (sometimes referred to as C.C.2), would fly powered by his engine. Campini used the term thermojet at this ...

5. Dahlander pole changing motor - Wikipedia

   en.wikipedia.org/wiki/Dahlander_pole_changing_motor

   A Dahlander motor (also known as a pole changing motor, dual- or two speed-motor) is a type of multispeed three-phase induction motor, in which the speed of the motor is varied by altering the number of poles; this is achieved by altering the wiring connections inside the motor. The motor may have fixed or variable torque depending on the ...

6. Lockheed A-12 - Wikipedia

   en.wikipedia.org/wiki/Lockheed_A-12

   Lockheed YF-12. Developed into. Lockheed SR-71 Blackbird. The Lockheed A-12 is a retired high-altitude, Mach 3+ reconnaissance aircraft built for the United States Central Intelligence Agency (CIA) by Lockheed 's Skunk Works, based on the designs of Clarence "Kelly" Johnson. The aircraft was designated A-12, the twelfth in a series of internal ...

7. Supersonic aircraft - Wikipedia

   en.wikipedia.org/wiki/Supersonic_aircraft

   The first aircraft to fly supersonic in level flight was the American Bell X-1 experimental plane which was powered by a 6,000-pound (2,700 kg) thrust rocket powered by liquid oxygen and ethyl alcohol. Most supersonic aircraft have been military or experimental aircraft. Aviation research during World War II led to the creation of the first ...