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PRATT & WHITNEY CSD ROCKET MOTOR SUCCESSFULLY PROPELS SATELLITE TO ORBIT IN HISTORIC RESCUE

 PRATT & WHITNEY CSD ROCKET MOTOR SUCCESSFULLY PROPELS SATELLITE
 TO ORBIT IN HISTORIC RESCUE
 HOUSTON, May 14 /PRNewswire/ -- In a historic rescue today, a Pratt & Whitney Chemical Systems Division (CSD) rocket motor successfully re-boosted a $150 million communications satellite stranded in orbit.
 During a choreographed ballet orbiting the Earth at 17,500 mph, the Space Shuttle Endeavour achieved a daring rescue of an Intelsat VI communications satellite marooned in a low orbit since 1990. The CSD perigee kick motor, which boosts the satellite from perigee or lowest point in its elliptical orbit, was attached by Endeavour's crew. The kick motor propelled the satellite into a temporary orbit almost a quarter of the way to the moon, boosting the Intelsat VI to a 45,000- mile supersynchronous transfer orbit, from where it will be maneuvered into its proper geostationary orbit, 22,300 miles above Earth.
 "This was the most complex satellite rescue mission ever attempted, and we are honored to be a part of this historic moment," said D. A. North, executive vice president and general manager, CSD. "The rocket motor performed as advertised, flawlessly."
 Designated Orbus 21S, the rocket motor weighs 23,000 pounds, is approximately 10 feet tall and eight feet in diameter. The solid propellant motor was built by CSD and provided to Hughes Aircraft Co., El Segundo, Calif., for the mission.
 In 1990, a malfunction in the Titan 3 launch vehicle separation system kept the satellite from separating from the rocket's second stage. To prevent re-entry, the launch controllers decided to move the satellite to a safe orbit and commanded the satellite to separate from its unused perigee kick motor, losing the energy needed to maneuver it to its planned orbit.
 The satellite will provide a variety of voice, video and data communications, carrying up to 120,000 simultaneous telephone calls and three color television channels. It is expected to be in full service by mid-1992 and will be used to help provide coverage of the Summer Olympic games in Barcelona, Spain.
 Pratt & Whitney Government Engines & Space Propulsion designs, develops and supports space propulsion systems and military jet engines. The operating unit, headquartered in West Palm Beach, Fla., includes Chemical Systems Division of San Jose, Calif., and USBI Inc., with facilities in Florida, Alabama and Louisiana. Pratt & Whitney is a unit of United Technologies Corporation based in Hartford, Conn.
 -0- 5/14/92
 /CONTACT: Patrick Louden of Pratt & Whitney, 407-796-6793; or John Anderson of Pratt & Whitney Chemical Systems Division, 408-776-4576/ CO: Pratt & Whitney; Pratt & Whitney Chemical Systems Division ST: Florida, Texas IN: ARO SU:


AW-JJ -- FL007 -- 0322 05/14/92 14:35 EDT
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Publication:PR Newswire
Date:May 14, 1992
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