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A speed to fly ring (known as a 'MacCready Ring'), which is fitted around the aircraft's variometer, will indicate the optimum airspeed to fly between thermals for maximum crosscountry performance. The ring is usually calibrated in either knots or meters per second and its markings are based on the aircraft's polar curve. [ 16 ]
Paul Beattie MacCready Jr. (September 25, 1925 – August 28, 2007) was an American aeronautical engineer. He was the founder of AeroVironment and the designer of the human-powered aircraft that won the first Kremer prize .
Its successor, the MacCready Gossamer Albatross can fly as slow as 9.23 miles per hour (14.85 km/h). [1] It has a maximum speed of 18 miles per hour (29 km/h). [2] The Ruppert Archaeopteryx has a certified stall speed of 30–39 kilometres per hour (19–24 mph). [3] The Vought XF5U can fly as slow as 32 kilometres per hour (20 mph). [4]
The aircraft was designed and built by a team led by Paul B. MacCready, a noted American aeronautics engineer, designer, and world soaring champion. Gossamer Albatross was his second human-powered aircraft, the first being the Gossamer Condor, which had won the first Kremer prize on August 23, 1977, by completing a 1-mile (1.6 km)-long figure-eight course.
Man captures unbelievable photo of Blue Angel fighter jet buzzing the Golden Gate Bridge at 350 mph ... the top speed pilots are allowed to fly the jets during a performance is about 700 mph, or ...
Paul MacCready Jr. Two Kremer speed challenges won, doing 1500 m in 163.28 seconds on 18 July 1984 and 143.08 seconds on 2 December 1984. Bird Ornithopter: UK: Ornithopter: Bryn Bird: Two prototypes built, but no record of any flights. Bliesner 1 to 3: USA: 1978: Wayne T. Bliesner: Unsuccessful precursors to Bliesners more successful efforts.
The first Kremer prize of £50,000 was won on 23 August 1977 by Dr. Paul MacCready when his Gossamer Condor, piloted by Bryan Allen, was the first human-powered aircraft to fly a figure eight around two markers one half mile apart, starting and ending the course at least 10 feet (3.0 m) above the ground. [3]
The Lockheed L-133 was an exotic design started in 1939 which was proposed to be the first jet fighter of the United States Army Air Forces (USAAF) during World War II.The radical design was to be powered by two axial-flow turbojets with an unusual blended wing-body canard design capable of 612 mph (985 km/h) in level flight.