Скачать или смотреть How Fighter Jet Exhausts Don’t Melt 🔥🛩️

Ever wonder why the F-22 Raptor’s exhaust nozzles don’t melt at temperatures exceeding 2,000°F? It’s not just one material—it’s a masterclass in thermal engineering.

Here is how the Raptor stays cool while running hot:
• The "Air Shield" (Film Cooling): The metal never actually touches the hottest gases. "Cool" bypass air is pumped through thousands of tiny, laser-drilled holes, creating a thin protective boundary layer that acts as a thermal barrier.

• Advanced Superalloys: The nozzles are built from Alloy C, a specialized burn-resistant titanium designed to maintain its structural integrity at temperatures that would turn standard aerospace metals into butter.

• Ceramic Stealth Coatings: The interior is lined with Ceramic Matrix Composites (CMCs). These withstand extreme heat far better than metal and help dissipate the jet’s infrared signature to hide it from heat-seeking missiles.

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