Hercules Inc. - Solid-fuel Rocket Motor Production

Solid-fuel Rocket Motor Production

Beginning in 1959, Hercules, Inc., began to diversify into the production of large solid-fuel rocket motors, and it soon became a primary producer of these, especially for the U.S. Department of Defense, U.S. Air Force, U.S. Navy, and U.S. Army - and to a lesser degree for the civilian National Aeronautics and Space Administration (NASA). One of its major solid-fuel rocket products was stages for the four-stage solid-fueled Minuteman intercontinental ballistic missile (ICBM) for the U.S. Air Force, of which 1,000 were made and deployed at Air Force Bases in several northern states during the 1960s. In addition, all of the missiles of the Minuteman I series were removed from service and replaced with the Minuteman II and Minuteman III series of more-advanced ICBMs. Hence, the Minuteman ICBM program was a huge project and a major source of revenue for Hercules, Inc.

Hercules, Inc., also produced the solid-fueled rocket motors for the two-stage Polaris missile system of intermediate-range ballistic missiles (IRBMs) for the U.S. Navy in its 41 for Freedom series of 41 George Washington class ballistic missile submarines. These nuclear submarines carried 16 Polaris missiles apiece for a grand total of 656 missiles. In addition, the Polaris series consisted of the successively-improved Polaris A-1, Polaris A-2, and Polaris A-3 missiles. The early Polaris submarines that had been armed with the Polaris A-1 were upgraded to the Polaris A-2; and then all that had been armed with the Polaris A-2 were upgraded to the Polaris A-3.

For some of the early Polaris submarines, the Polaris A-3 was the end of their upgrades, but a large number of them (about 31) were further rearmed with the more-advanced and longer-ranged two-stage Poseidon C-3 missile. Hence, the Polaris missile submarine program was also a huge project and a major source of revenue for Hercules, Inc.

During the 1960s, Hercules, Inc., also made solid-fuel rocket motors for hundreds of the U.S. Army's Honest John missile, a mobile tactical missile for carrying tactical nuclear weapons for U.S. Army divisions. The Honest John missile was mostly deployed with the U.S. Seventh Army in West Germany as part of the American commitment to NATO to defend Western Europe against aggression from the Warsaw Pact, using nuclear weapons on Eastern Europe, if necessary. None of the Honest John, Minuteman, Polaris, or Poseidon has ever been used in combat, and the threat of nuclear war has been sufficient to deter aggression and to obviate the need of the use of nuclear weapons for defense.

During the 1970s and 80s, the Honest John missile was removed from deployment, scrapped, and replaced by the more-advanced Lance missile by the U.S. Army in Europe. Of all of the missiles mentioned above, only a reduced number of the Minuteman missiles remain in service at Air Force Bases in the United States, with all of the others having been removed from deployment and scrapped, along with all of the Polaris and Poseidon submarines.

For space exploration and satellite launches by the U.S. Air Force and NASA, Hercules, Inc., developed and manufactured the two large, strap-on solid-fueled booster rockets for the otherwise liquid-fueled, and huge, Titan III and Titan IV rockets. These strap-on rockets were used on the Titan IIIC, Titan IIID, and Titan IIIE rockets, and on all of the Titan IV rockets that were ever produced.

After the end of production and firing of NASA's huge Saturn IB and Saturn V rockets, the Titan IV was the largest and heaviest unmanned rocket available anywhere in the world, and especially in the Titan IV-Centaur version. The Titan IV-Centaur was used for special launches of heavy space probes into the Solar System, such as the Cassini-Huygens mission to Saturn which was launched in 1997. The Titan IV is no longer manufactured, and the last one of these was fired during a launch in October 2005.