(under subclass 200.1) Apparatus having means by which a fluid film, other than air, may be caused to sweep a surface of the apparatus between said surface and the motive fluid presented to said surface.
(1) Note. Included in this definition is a fluid film formed by ablatable material on a motive fluid engageable surface.
SEE OR SEARCH THIS CLASS, SUBCLASS:
257+, particularly subclasses 258 and 261 for reaction motors wherein liquid oxidizer or fuel are sprayed onto or otherwise caused to flow on the walls of a combustion chamber prior to combustion.
SEE OR SEARCH CLASS
239, Fluid Sprinkling, Spraying, and Diffusing,
265.15, for reaction motor nozzles having an erodible, frangible or fusible part.
