EXTERNAL EXPANSION NOZZLE Russian patent published in 1999 - IPC

FIELD: oxygen-hydrogen engine plants of single-stage non-expendable transport vertical launch and landing space systems. SUBSTANCE: nozzle includes truncated central body with fire wall and regenerative cooling jacket and propellant component manifolds. Fire wall and cooling jacket are made in form of surfaces of hyperboloid of one sheet assembled from members with rectilinear generatrices of box section with two arcs of circle and radial strip; beside that, face ends of each member are secured to arcs of circle and radial strips of manifolds. EFFECT: increased specific impulse of engine at low altitudes at accuracy of nozzle profile close to theoretical. 2 dwg