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HERCULES COMPLETES STATIC TEST FIRING OF ITS SRMU FOR THE TITAN IV SPACE LAUNCH VEHICLE

 EDWARDS AIR FORCE BASE, Calif., Feb. 22 /PRNewswire/ -- Hercules Incorporated (NYSE: HPC) today announced the successful completion of the third static test firing of its Solid Rocket Motor Upgrade (SRMU) for the U.S. Air Force Titan IV space launch vehicle.
 The test, which was conducted yesterday at 12:10 p.m. (PST), verified the operability of the motor at low temperatures (40 degrees F).
 "Our initial review of the test data indicates that the motor performed as predicted," said Richard Schwartz, Hercules Aerospace Company, president. "If the hardware inspections prove to be favorable, we have a third fully successful test. Motor burn time was as predicted, and the lightweight graphite composite case appears to have again performed as anticipated. Early data also indicate that the motor nozzle thrust vector control (TVC) system responded satisfactorily to the full range of commands. These results are very gratifying because they demonstrate the validity of our design and the excellent repeatability of our SRMU manufacturing process. Final analysis of performance data will be completed in approximately 30 days. Like the successful tests in June and October of last year, this test demonstrates the viability of the SRMU in meeting the large-payload requirements of the Department of Defense."
 The test motor, containing nearly 700,000 pounds of solid propellant delivered 1.7 million pounds of thrust with a burn time of approximately 140 seconds.
 "The Air Force/Martin Marietta/Hercules team has reason to be proud of today's achievement. The team's efforts and commitment to the SRMU have resulted in the attainment of another critical program milestone," Schwartz added.
 In acknowledging the test, Martin Marietta Astronautics Group of Denver, the prime contractor for the Titan vehicle, again emphasized the importance of the SRMU to modernization initiatives for the Titan IV launch vehicle. The upgraded solid rocket motors will increase payload capability by approximately 25 percent, enabling the Department of Defense to place critical payloads into orbit, as well as meeting new launch safety requirements.
 Two additional static test firings, which will complete the SRMU qualification, will be conducted later this year.
 Hercules Incorporated is a diversified, worldwide producer of chemicals, related products, and space propulsion systems. The Titan IV SRMU is produced at the Hercules Aerospace Company's Utah facility, a leading U.S. manufacturer of solid propulsion systems for space and strategic defense applications.
 /delval/
 -0- 2/22/93
 /CONTACT: Donald R. Kirtley of Hercules, 302-594-6918/
 (HPC)


CO: Hercules Incorporated ST: Delaware, California IN: ARO SU:

MP-MK -- PH001 -- 8802 02/22/93 08:51 EST
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Date:Feb 22, 1993
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