Wayne V. Spate

An Overview of the Hypervelocity Anti-Tank Missile (HATM) Development Program

During a six-year period from mid-1997 until the end of 2002, Raytheon, Alliant Tech Systems, and NAMMO Raufoss, AS teamed together to design and develop a light-weight, compact, potentially low-cost hypervelocity missile capable of flying at speeds in excess of Mach 6.5 to defeat a variety of targets at realistic line-of-sight ranges. This IRAD program produced design innovations in high-energy reduced smoke propellants, composite case and nozzle technologies, stowage-deploymentstaging concepts, precision thrust vector control, fin actuation, igniter design and system integration. This paper presents an overview of the design concept and the subscale component and static testing efforts that led to the flight testing that culminated in two successful ballistic flights in Norway that achieved hypervelocity flight with staging at the maximum velocity conditions in November of 2002. This paper is the first in a series of seven papers that will cover all aspects of the HATM design evolution, program history, its purpose and objectives, choice of propellant and the system overview. AIAA JPC 2005-4171 July 8, 2005

The Hypervelocity Anti-Tank Missile Development Program; Passive Separation Mechanism

During a six-year period from mid-1997 until the end of 2002, Raytheon, Alliant Tech Systems, and NAMMO Raufoss AS teamed together to design and develop a light-weight, compact, potentially low cost hypervelocity missile capable of flying at speeds in excess of Mach 6.5 to defeat a variety of targets at realistic line-of-sight ranges. The HATM design utilized advanced design innovations in high-energy reduced smoke propellants, composite case and nozzle technologies, stowage-deployment-staging concepts, precision thrust vector control, fin actuation, igniter design and system integration. This paper presents the Kill Vehicle (KV) lock and release mechanism. The separation mechanism includes also the system to brake down the KV during the deployment phase and the locking of the KV during flight. The passive release mechanism is utilising the aerodynamic drag. The paper presents the requirements, the design and the performed tests including the final flight tests.

The Hypervelocity Anti-Tank Missile Development Program; Light Weight Low Erosion Nozzle

During a six-year period from mid-1997 until the end of 2002, Raytheon, Alliant Tech Systems, and NAMMO Raufoss AS (Nammo) teamed together to design and develop a lightweight, compact, potentially low-cost hypervelocity missile capable of flying at speeds in excess of Mach 6.5 to defeat a variety of targets at realistic line-of-sight ranges. The HATM design utilized advanced design innovations in high-energy reduced smoke propellants, composite case and nozzle technologies, stowage-deployment-staging concepts, precision thrust vector control, fin actuation, igniter design and system integration. This paper presents the optimized and submerged nozzle design. The optimization of the nozzle was based upon maximum system performance and validation of nozzle efficiency is performed with static motor firings. A minimum of nozzle throat erosion was achieved using a combination of molding technique and nozzle design principles.