Challenger


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Challenger,

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.

Challenger

 

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.

challenger

[′chal·ən·jər]
(electronics)
References in periodicals archive ?
Flexjet began taking deliveries of the specially outfitted Flexjet LXi version of the Challenger 350 in January 2015, part of an order placed with Bombardier in 2013 for Challenger and Learjet products.
King of the Shakers" -- all-new 2015 Dodge Challenger 392 HEMI Scat Pack Shaker combines the ultimate combination of 485 best-in-class horsepower and legendary Dodge heritage cues with a functional Shaker hood
We are thrilled that Bombardier s new Challenger 350 business jet will join the fleet of aircraft operated by International Jet Management, said Simon Burrows, Regional Vice President, Sales, Western Europe, Bombardier Business Aircraft.
This is a fantastic milestone for the Challenger 300 jet, an aircraft that continues to exceed customer expectations," said Eric Martel, vice-president and general manager, Challenger and Global.
SMS, a company owned by tuner Steve Saleen, is introducing two performance versions of Chrysler's 2009 Dodge Challenger R/T.
AC: How would a potential challenger communicate his or her abilities to you?
Soaring construction costs also hit the construction of Saddleback and expansion of Challenger Middle School, forcing Wilsona officials to re-examine building plans to see where costs could be cut.
leased 6,948 square feet of office space on the second floor at the 65 Challenger address.
AM: As one of AGCO's machinery brands, how does the company work with Caterpillar to create Challenger tractors?
Nick Faunce went 3-for-3 for the Challengers with a single, double and solo home run, and Sean Martin went 2-for-3 with a solo home run in the fourth inning.
At least three other contenders are attempting to beat him to the punch: Unicef Flyer (piloted (by three balloonists from Holland); Global Challenger, (with three flyers from England); and Odyssey (a two-member team from New Mexico).
The Challenger tragedy didn't come out of nowhere--there were repeated danger signs clear to any reporter willing to look beneath the PR gloss.