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Regenerative cooling of a hypersonic vehicle uses

  • A.Radiation to space only
  • B.The fuel itself as a coolant before it is burned
  • C.Ambient air ducted over the structure
  • D.Water carried for the purpose

Answer: B

Passing the fuel through structural passages absorbs heat that would otherwise destroy the airframe and preheats the fuel for combustion. It is one of the few thermal management options available when surface temperatures reach such levels.

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