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HERCULES INCORPORATED ANNOUNCES SUCCESSFUL COMPLETION OF THIRD MISSION OF PEGASUS AIR-LAUNCHED SPACE VEHICLE

 WILMINGTON, Del., Feb. 9 /PRNewswire/ -- Hercules Incorporated (NYSE: HPC) today announced the successful completion of the third mission of the Pegasus air-launched space vehicle this morning.
 Launch of the Pegasus occurred over the Atlantic Ocean, 80 miles east of Kennedy Space Center, Fla., at 9:30 a.m., EST, at an altitude of 43,500 feet. Preliminary data indicate that all Pegasus propulsion, avionics and guidance and control systems performed correctly, placing Brazil's Satellite de Coleta de Dados (SCD-1) into the targeted orbit at 9:41 a.m., EST.
 The Pegasus space vehicle was developed, designed and manufactured through a privately funded /Hercules Aerospace joint venture. Hercules Aerospace designed and produced the three-stage solid booster at its Bacchus Works, Utah, facility. Orbital Sciences is responsible for overall systems engineering. In 1991, President George Bush awarded Orbital Sciences and Hercules the National Medal of Technology for Pegasus.
 Pegasus was carried aloft by a B-52 aircraft to level flight conditions of about 40,000 feet. Approximately five seconds after its release from the B-52, the Pegasus propulsion system ignited, delivering its payload into low earth orbit about 11 minutes later.
 This was the first commercial mission for Pegasus, the first mission conducted for an international customer, and the first Pegasus mission originating from Kennedy Space Center. The previous two Pegasus missions were conducted for the Defense Advanced Research Projects Agency (DARPA) and were initiated from Edwards Air Force Base in California. Four to six more Pegasus launches, with payloads for NASA, the Air Force, ORBCOMM and the Strategic Defense Initiative Organization, are planned for 1993. Hercules and Orbital Sciences have an additional 14 firm flight commitments with options for 55 more launches after 1993.
 Richard Schwartz, president, Hercules Aerospace Company, commented on today's successful mission, "Once again, the Pegasus team has proven that we have a reliable, cost-effective and responsive space transportation system. Today's success establishes the Pegasus system as the small launcher of the future. We look forward to continuing to demonstrate the viability and reliability of the Pegasus vehicle with this year's aggressive launch schedule."
 -0- 2/9/93
 /CONTACT: R.B. Hessler of Hercules, 302-594-6920/
 (HPC)


CO: Hercules Incorporated; Hercules Aerospace Company; Orbital Sciences ST: Delaware, Florida IN: ARO SU:

CC -- PH041 -- 4851 02/09/93 16:55 EST
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Date:Feb 9, 1993
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