Patent ID: 6336609
Filing Date: 2002-01-08
Classification: F42B

Abstract:
A method for a shell that is fin-stabilized at least during a final part of a flight trajectory of said shell, for preventing deformation of deployable fins incorporated in a tail unit of said shell, said method comprising the steps of:providing a shell that is fired from a gun barrel where the shell is subjected to the full effect of propellant gas pressure in the gun barrel during a firing phase; protecting said fins during a firing phase of said shell by a fin protector with limited wall thickness, said fin protector surrounding a rear section of said shell and being ejected at a point in time for fin deployment; designing said fin protector to join an external surface of said shell at a sealed interface, said fin protector being separable from said shell at said interface; and filling a ring-shaped space, within said fin protector and not occupied by said fins, completely with an inert, non-combustible, non-glutinous substance of low compressibility and very low inherent strength.