Accession Number : ADA143778


Title :   Electromagnetic Launchers and Guns. Phase 1


Descriptive Note : Final rept. Nov 1979-May 1980


Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE


Personal Author(s) : Kolm, H ; Miller, R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a143778.pdf


Report Date : Jun 1980


Pagination or Media Count : 139


Abstract : During the first six months (phase one) the group constructed a 65 KJ, 6 kV fast discharge capacitor bank, a 134 kJ, 900 V slow discharge bank, and a 245 kJ, 350 V mobile bank for field launching was started. Also completed was an accelerator test bench and a protected control and observation room instrumented with digital data processing equipment. Studies have been initiated on three acceleration mechanisms, and on the theoretical limitations in general. A 'helical railgun' (brush-commutated helical accelerator) was bench-tested to 500 gee acceleration and 30 m/s velocity achieved over a 12 inch section. A 20 foot, twin helix launcher and optimized cargo or reconnaissance glider were designed, for construction during phase two. Mass driver (discrete-coil, synchronous accelerator) coils were tested to destruction over a range of pulse conditions to gain an understanding of failure modes and develop improved designs for different ranges of operation. A momentum transformer has been constructed for transferring momentum from a pneumatically driven sabot to a smaller projectile. Theoretical studies indicate that the smallest vehicle capable of surviving a ground-based launch to earth escape velocity at reasonable atmospheric losses of mass and energy is a 25 kg, 6 cm caliber cylinder.


Descriptors :   *ELECTROMAGNETISM , *LAUNCHERS , *LAUNCHING , ACCELERATION , COILS , ESCAPE VELOCITY , GLIDERS , GUNS , SABOT PROJECTILES


Subject Categories : Terminal Flight Facilities
      Machinery and Tools


Distribution Statement : APPROVED FOR PUBLIC RELEASE