THERMAL PROTECTION SYSTEM FOR HYPERPLANES (Seminar Hyperplanes)

New materials offer good insulation at high temperature, but they often sacrifice themselves in the process. Therefore studies often plan on "active cooling", where coolant circulating throughout the vehicle skin prevents it from disintegrating. Often the coolant is the fuel itself, much in the same way that modern rockets use their own fuel and oxidizer as coolant for their engines. All cooling systems add weight and complexity to a launch system and reduce its efficiency. The increased cooling requirements of scramjet engines result in lower efficiency. Heat resistant materials like insulating tiles and materials made of Titanium and its alloys can be used as passive cooling methods. Active cooling methods (by coolants or fuel itself) can also be employed which is widely used in space crafts.A combination of this two methods can also be tried.The real challenge lies in the development of composite materials which are light weight and also a better thermal insulator.