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HERCULES INC. ANNOUNCES STATIC TEST FIRING OF SOLID ROCKET MOTOR UPGRADE FOR TITAN IV LAUNCH VEHICLE

 HERCULES INC. ANNOUNCES STATIC TEST FIRING OF SOLID
 ROCKET MOTOR UPGRADE FOR TITAN IV LAUNCH VEHICLE
 EDWARDS AIR FORCE BASE, Calif., June 12 /PRNewswire/ -- Hercules Incorporated (NYSE: HPC) today announced the static test firing of a solid rocket motor upgrade (SRMU) for the U.S. Air Force's Titan IV launch vehicle.
 "Preliminary data are very positive, but we must await hardware inspection before total results are known," said Richard Schwartz, president, Hercules Aerospace.
 "Initial information indicates that the grain design modifications made after last year's incident performed as predicted. New, state-of- the-art modeling techniques were used as an effective tool to predict internal motor flow dynamics. These results indicate that the motor will meet the increased performance that will provide added capability to the Titan IV vehicle. Within 10 days, all hardware items that could impact the program will be evaluated; total inspections will be completed in 30 days," he added.
 Martin Marietta Astronautics Group, Denver, the prime contractor for the Titan vehicle, has confirmed the test. The company indicated its importance in the system modernization to assure the Titan vehicle meets future Air Force requirements. These upgraded solid rocket motors improve system reliability; increase vehicle payload capability by more than 25 percent to lift large, critical Department of Defense payloads; and meet modern launch safety requirements.
 The test motor, containing nearly 700,000 pounds of solid propellant, performed as predicted, and delivered a maximum thrust of 1.7 million pounds with a burn time of 140 seconds. Both of these values are within specification ranges. This assures compatibility with other elements of the launch vehicle and the payload as these upgraded motors are used on future Titan IV launches.
 "We feel highly optimistic about the results and, if the hardware inspections are favorable, we are clearly back on track," said Schwartz. "The success of this test is due to the total team effort of the dedicated group involving Hercules Incorporated, Martin Marietta, the U.S. Air Force, and Aerospace Corporation. Their unified activities have successfully brought this program through an extremely difficult period," he added.
 Four additional firings at approximately three-month intervals are planned to complete qualification of the motor.
 Hercules is a $3 billion diversified, worldwide producer of chemicals and related products and solid fuel systems. The Titan SRMU rocket motor is produced at the company's Utah facility, which is one of the leading U.S. manufacturers of strategic and space rocket motors, as well as high-technology composite structures and graphite fibers.
 /delval/
 -0- 6/12/92
 /CONTACT: Donald R. Kirtley of Hercules, 302-594-6918/
 (HPC) CO: Hercules Incorporated; Martin Marietta Astronautics Group ST: Delaware IN: ARO SU:


SF-JS -- PH041 -- 9852 06/12/92 17:04 EDT
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Date:Jun 12, 1992
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