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U.S. space shuttle. It exploded (Jan. 28, 1986) 73 seconds into its tenth flight, killing all seven crew members, including the first civilian in space, schoolteacher Christa McAuliffe. The disaster was caused by the faulty design of a gasket (the O-ring seal). As dramatically demonstrated by Richard FeynmanFeynman, Richard Phillips
, 1918–88, American physicist, b. New York City, B.S. Massachusetts Institute of Technology, 1939, Ph.D. Princeton, 1942. From 1942 to 1945 he worked on the development of the atomic bomb.
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, a member of the presidential commission appointed to investigate the accident, the elastic O-ring did not respond as expected because of the cold temperature (30°F;/-1°C;) at launch time. (At a news conference, Feynman illustrated the loss of elasticity by dropping an O-ring into a glass of cold water.) As a result of the explosion, the United States did not send astronauts into space for almost three years as the National Aeronautics and Space Administration redesigned a number of features of the space shuttle.



a three-masted English corvette with sail rigging and an 885-kilowatt (1200-hp) auxiliary engine. The Challenger was 62.5 m long and had a displacement of 2,300 tons.

The Challenger was refitted in 1872 into an oceanographic vessel for hydrologic, geological, chemical, biological, and meteorological research. Commanded by Captain G. Nares, the Challenger made a round-the-world cruise from 1872 to 1876, carrying an expedition headed by C. W. Thomson. The expedition collected data on the physical and chemical characteristics of the water, on bottom relief, and on the geologic structure of the floor of the world ocean.

The Challenger was the first of the world’s oceanographic vessels. A modern US research vessel used for deep-sea drilling, the Glomar Challenger, was named in honor of the Challenger. Built in 1968, the Glomar Challenger has a 7.36-megawatt (10,000-hp) engine. It is 122 m long, has a displacement of 10,500 tons, and can run at a speed of 12 knots.


References in periodicals archive ?
Exceptional ride quality is an important component of the aircrafts success, and the Challenger 350 business jet features a smooth and quiet ride that elevates its widely-praised cabin experience to the next level.
Challenger 650 aircraft feature an advanced wing design that minimizes the effect of turbulence, resulting in a smoother ride from takeoff to landing.
Following the Sale, Challenger will retain its equity stake in the New York Wheel LLC, with a minimum of two equity units and up to three equity units depending on the closure of at least one project by Starneth in the next two years.
The Challenger SRT Hellcat is the first Dodge with a supercharged Hemi V-8.
By teaching, the Challenger shows up in the customer's office and leads with compelling information on ways the customer can save money and break barriers.
However, a challenger brand's mission is to attack the market leader whenever it gets the opportunity to do so and capture its market share.
Incumbent Democrat Jean Cowan was leading challenger Becky Lemler, 58 percent to 41 percent for House District 10.
The company will acquire all of the outstanding common shares of Challenger in exchange for issuance of 0.
The versions have been named the SMS 570TM Challenger and SMS 570XTM Challenger.
BS: When people contact me about being a challenger, I tell them to send me a bio, send me a photo of yourself.
in Ridgefield Park, N J, and brought the firm to 65 Challenger Road, part of the Class A commercial complex known as Overpeck Centre.