Accession Number : ADD007804

Title :   Boattail Emergence by Ejecting Nozzle Exit Cone.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : McDermott,Joseph J ; White,James W

Report Date : 28 Jul 1980

Pagination or Media Count : 7

Abstract : This invention describes a device for altering the after body shape of a missile configuration so as to reduce the ballistic flight drag coefficient after booster burnout. It includes a linear shaped charge cutting device for severing a portion of a nozzle exit cone just aft of a fixed boattail configuration on the outer surface of the missile. This device allows boundary layer air flow to flow smoothly over the boattail and thereby reduce the base drag on the missile during the coast phase thereof. (Author)

Descriptors :   *Patent applications, *Boattail afterbodies, *Drag reduction, *Cutting tools, *Shaped charges, *Rocket nozzles, Guided missiles, Burnout, Booster rocket engines, Aerodynamic characteristics, Modification, Inventions

Subject Categories : Guided Missiles
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE