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Gun equipped with down-bore liquid propellant booster stage to increase projectile muzzle velocity

  • US 5,631,436 A
  • Filed: 06/15/1995
  • Issued: 05/20/1997
  • Est. Priority Date: 06/15/1995
  • Status: Expired due to Fees
First Claim
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1. A gun comprising, in combination:

  • a breech for receiving a projectile and a breech propellant charge;

    an elongated gun barrel having a bore communicating at one end with the breech and terminating at a muzzle; and

    a booster stage including;

    a cannister equipped to the gun barrel down-bore from the breech to define a reservoir in fluid communication with the bore, said cannister including a cylindrical surface radially expanded from the bore to define an annular reservoir open to the bore; and

    charging apparatus connected to a source of liquid propellant to introduce the liquid propellant into the reservoir tangentially to the cylindrical surface Such as to produce a toroidal flow of liquid propellant surrounding the bore for charging the reservoir with the liquid propellant for detonation by combustion gases generated by detonation of the breech propellant charge that propels the projectile down the bore.

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