The Long Standoff Explosive Gun (LSEG) A Multiple Fragment Launcher

Period of Performance: 01/19/1999 - 01/20/2001


Phase 2 SBIR

Recipient Firm

DE Technologies, Inc.
100 Queens Drive
King of Prussia, PA 19406
Principal Investigator

Research Topics


Typically, bombs and warheads are too large to enable economical experimental evaluation of fragment effects. A repeatable, effective, easily employed system to explosively launch scaled simulated bomb fragments in a predictable pattern is required. The launcher developed in the Phase I program is referred to as a Long Standoff Explosive Gun (LSEG), and incorporates Explosively Formed Penetrator (EFP) warhead technology, modified, however, for projecting fragments. The launcher operates at large standoffs, thereby reducing the amount of blast energy transmitted to the pendulum target. The Phase I launcher was designed to project simulated fragments from the Mk-84 GP bomb. The fragments have a long-lender geometry, with a Length-to-Width (L/W) of 7.5 and a % scale mass of 65-grains. The fragments are projected at a velocity of 7,792 ft/s. During the Phase I Program, the launcher will be tested in 1/8 scale in order to verify performance and optimize the design. For the Phase II Program, launcher designs for other threats will be developed and tested in both 1/8 and 1/4 scales. Additionally, a design synthesis method will be documented in order to facilitate the design of new launchers capable for simulating other threat munitions. BENEFITS: The proposed program will advance the understanding of controlling the trajectory and dispersion of fragments, and therefore will benefit numerous warhead development programs concerned with optimizing fragment output. The developed system will have application in the research and testing of building materials and equipment in design of conventional civilian buildings where explosion effects are a consideration.