Use of aerodynamic heating to provide thrust by vaporization of surface coolants

W. E. Moeckel
naca-tn-3140
Feb 1954


Analysis is made of the propulsive thrust and specific impulse attainable by cooling aircraft surfaces with liquified or solidified gases having vaporization temperatures lower than the equilibrium surface temperature. It is found that for some coolants a net thrust is obtainable without further heat addition at all flight speeds if the vaporization temperature and heat of vaporization are sufficiently low.

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