When a missile roars into the sky, its speed creates a powerful visual impact. However, this speed comes from high-energy fuel, not petrol or diesel. Moreover, this special propellant generates immense thrust within seconds. Therefore, missiles quickly cross sound speed and reach thousands of kilometres per hour.
Missile Fuel Basics
Many people assume missiles use fuel similar to aircraft systems. However, this assumption does not match reality at all. Instead, missiles require high-energy rocket fuel to overcome gravity rapidly. Petrol and diesel lack sufficient energy density for such acceleration.
Therefore, missile fuel must generate massive gas output instantly. This rapid gas expansion produces strong thrust needed for launch and flight.
Solid Fuel Explained
Most ballistic missiles, including India’s Agni-V, use solid fuel systems. In this method, engineers mix HTPB polymer with ammonium perchlorate oxidizer. This mixture forms a rubber-like paste stored inside the rocket motor casing.
Importantly, solid fuel offers long-term storage capability without degradation. Therefore, forces can launch missiles instantly during emergencies. Once ignition starts, the fuel burns continuously without interruption.
Liquid Fuel and Control Advantage
Meanwhile, liquid fuel represents another important propulsion system in missiles. In this system, UDMH fuel and nitrogen tetroxide oxidizer stay in separate tanks. When engines activate, pipelines mix these chemicals inside a combustion chamber.
This setup allows scientists to control fuel flow precisely during flight. Therefore, they can adjust speed or even shut down engines if required. However, this system involves complex design and handling.
Newton’s Law and Supersonic Speed
Missile speed depends on Newton’s third law of motion. When fuel burns, hot gases eject backward at high pressure. Consequently, the missile moves forward with equal force.
This thrust enables systems like BrahMos to achieve Mach 2.8 to Mach 3 speeds. Such velocity limits enemy radar reaction time significantly.
How Hypersonic Speed Becomes Possible
Today, global focus shifts toward hypersonic missile technology. These systems exceed Mach 5 speed, crossing five times the sound barrier. To achieve this, engineers use hybrid fuels and scramjet engines.
Additionally, aerodynamic design plays a crucial role in maintaining stability. Special chemical combinations and engine structures help missiles withstand air friction. Therefore, these systems strike targets within moments.
