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AGNI Strategic Missile Propellant

Propellant casting for India's AGNI Strategic Systems utilizes high-energy composite solid fuel. The mixture typically comprises Ammonium Perchlorate (AP) as an oxidizer, Aluminium (Al) powder as fuel, and Hydroxyl-Terminated Polybutadiene (HTPB) as a binder. This cast-bonded propellant provides high-thrust, stable, and reliable propulsion for multi-stage, long-range ballistic missiles.

Key Components & Properties:

• Oxidizer: Ammonium Perchlorate (NH₄ClO₄) – provides oxygen for combustion.
• Fuel: Aluminum powder (Al) – high energy density metallic fuel.
• Binder: Hydroxyl-Terminated Polybutadiene (HTPB) – rubbery matrix that holds the propellant together and provides additional fuel.
• Additives: Curing agents and burning rate modifiers to optimize combustion and mechanical properties.

Description:

The propellant mixture is prepared as a slurry and poured (cast) into the missile motor casing. A star-configured mandrel is used to create specific grain geometries that control the burning surface area and rate. Once cast, the propellant is cured to form a solid, durable, and rubbery grain capable of withstanding storage and operational stresses.

Use:

• Main solid rocket motor propellant for all stages of the AGNI missile series (Agni-I to Agni-V/VI).
• Delivers high-performance propulsion for short, medium, and intercontinental ranges (700 km to over 12,000 km).
• Ensures consistent combustion, thrust, and reliability under extreme operational conditions.

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