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The Advanced Precooler shown on your pin is a critical heat-exchanger technology developed by Reaction Engines Limited, a British aerospace manufacturer based in Oxfordshire, England. [1, 2]

Primary Purpose: Enabling Hypersonic Flight

The precooler is the core enabling technology for the SABRE (Synergetic Air-Breathing Rocket Engine). Its primary functions include: [1]

• Ultra-Rapid Cooling: It is designed to cool incoming air from over 1,000°C (experienced at hypersonic speeds of Mach 5) down to -150°C in less than 1/100th of a second. [1, 2]

• Preventing Overheating: By cooling the air before it enters the engine's core, it prevents engine components from melting or losing performance at extremely high speeds.