Motor programme gets a boost

and

have test-fired a second-stage booster motor under the Submarine Launched Intermediate Range Ballistic Missile (SLIRBM) Booster System Demonstration for the US Navy.

The modified second-stage ATK Orion 32-4 booster motor was fired for 40 seconds at maximum thrust at an ATK test facility in Promontory, Utah. The Orion 32-4 motor used high-performance solid rocket fuel.

In a similar test in July, the team successfully test-fired a modified ATK Orion 32-7, the first stage for the prototype two-stage propulsion system.

Both tests demonstrated the integrated operation of the motor with an electro-mechanical thrust vector control system that steers the motor's nozzle by responding to flight control and steering commands issued by an avionics system. Moog developed the thrust vector control system, which was integrated by ATK; Lockheed Martin developed the avionics system.

In the SLIRBM Booster System Demonstration, Lockheed Martin and ATK are demonstrating cost-effective, reliable and producible solid-propellant rocket motor technologies for a proposed conventional missile.