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Pratt & Whitney Rocketdyne Engines Lift Air Force DSP-23 Satellite into Orbit

CANOGA PARK, Calif., Nov. 12, 2007 – A trio of Pratt & Whitney Rocketdyne (PWR) RS-68 engines and a PWR RL10 upper stage engine worked in concert to boost an Air Force Delta IV Heavy rocket on Saturday from the Cape Canaveral Air Force Station. The Delta IV Heavy, in only the second launch of its kind, carried the Air Force’s DSP-23 defense satellite, which will detect the launch of hostile missiles. Pratt & Whitney Rocketdyne is a United Technologies Corp. [NYSE: UTX] company.

“The three RS-68 engines performed flawlessly,” said Craig Stoker, program manager for PWR’s RS-68. “With a lifting capacity of nearly 25 tons to low earth orbit, the Delta IV Heavy is one of the most powerful expendable vehicles in service today.”

“PWR’s role in this successful mission began with the three powerful RS-68 engines and ended with the precision of the RL10,” said Jim Maus, PWR program director for the RL10. “The combination of PWR power and reliability is a winning combination we proudly provide to the United Launch Alliance.”

At liftoff, the three PWR RS-68 engines combined to produce nearly two million pounds of thrust. Each of three common booster cores (CBCs) that comprised the Delta IV was powered by an RS-68. The two outer cores were jettisoned at about four minutes into the flight, while the center CBC continued on for another minute and a half.

When the third RS-68 reached main engine cutoff, the first stage of the vehicle separated and PWR’s RL10 propelled the upper stage and payload. The RL10 was fired three times to move the DSP-23 spacecraft into a geosynchronous orbit 22,000 miles above the Earth.

Pratt & Whitney Rocketdyne, Inc., a part of Pratt & Whitney, is a preferred provider of high-value propulsion, power, energy and innovative system solutions used in a wide variety of government and commercial applications, including the main engines for the space shuttle, Atlas and Delta launch vehicles, missile defense systems and advanced hypersonic engines.

Pratt & Whitney is a world leader in the design, manufacture and service of aircraft engines, space propulsion systems and industrial gas turbines. United Technologies, based in Hartford, Conn., is a diversified company providing high technology products and services to the global aerospace and building industries.

Bryan Kidder
Pratt & Whitney Rocketdyne
818 586-2213

John Mitchell
Pratt & Whitney Rocketdyne
818 586-4564

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