Railgun with advanced rail and barrel design

Details Railgun with advanced rail and barrel design Railgun with advanced rail and barrel design

1992-04-27

1994-03-29

Bentley, Stephen C.

Ordnance

Accelerating

124 3, F41B 600

Patent

active

052974685

ABSTRACT:
A railgun apparatus for accelerating a projectile having a conductive region. The railgun comprises a power supply for providing a current impulse and at least two elongate generally parallel rails. The rails include a first layer comprising a highly conductive material and a second layer comprising a highly resistive layer. The second layer has a resistivity that varies along the length of the rails and is so sized and arranged as to contact the conductive region of the projectile. The power supply is switchably connected to the first layer of the rails. When the current impulse is applied to the rails with the projectile therebetween, the current impulse is spread over the conductive region of the projectile to reduce the velocity skin effect.

REFERENCES:
patent: 1422427 (1922-07-01), Fauchon-Villeplee
patent: 1679518 (1928-08-01), Fowle
patent: 3126789 (1964-03-01), Meyer
patent: 3878409 (1975-04-01), Gill et al.
patent: 3918557 (1975-11-01), Ross, Sr.
patent: 4061627 (1977-12-01), Conrow et al.
patent: 4200831 (1980-04-01), Weldon et al.
patent: 4369691 (1983-01-01), Baehr, Jr. et al.
patent: 4423662 (1984-01-01), McAllister
patent: 4433607 (1984-02-01), Kemeny
patent: 4457205 (1984-07-01), Ross
patent: 4459504 (1984-07-01), Weldon et al.
patent: 4467696 (1984-08-01), McNab et al.
patent: 4485720 (1984-12-01), Kemeny
patent: 4608908 (1986-09-01), Carlson et al.
patent: 4625618 (1986-12-01), Howanick
patent: 4694729 (1987-09-01), Hall
patent: 4753153 (1988-06-01), Jasper, Jr.
patent: 4831913 (1989-05-01), Jasper, Jr.
patent: 4870888 (1989-10-01), Weldon et al.
patent: 4884489 (1989-12-01), Zowarka et al.
patent: 4913030 (1990-04-01), Reynolds
patent: 4924750 (1990-05-01), Neugebauer
patent: 4944212 (1990-07-01), Hilal
patent: 4945810 (1990-08-01), Parker
patent: 4953441 (1990-09-01), Weldon et al.
patent: 5076136 (1991-12-01), Aivaliotis et al.
patent: 5078042 (1992-01-01), Jensen
patent: 5138929 (1992-08-01), Weldon et al.
Bedford, A. J., "Rail Damage and Armature Parameters for Different Railgun Rail Materials", IEEE Transactions on Magnetics, vol. MAG-20, No. 2, Mar. 1984, pp. 352-355.
Marshall, Richard A., "The Use of Nested Chevron Rails in a Distributed Energy Store Railgun", IEEE Transactions on Magnetics, vol. MAG-20, No. 2, Mar. 1984, pp. 389-390.
J. Barber, A. Chillita, B. Maas, L. Thurmond, Contact Transistion in Metal Armatures, IEEE Trans. Mag. vol. 27, No. 1, pp. 228-232 (Jan. 1991).
D. P. Bauer, J. P. Barber and H. F. Swift, Application of Electromagnetic Accelerators to Space Propulsion, IEEE Trans. Mag., vol. Mag-18, No. 1, pp. 170-175 (Jan. 1982).
A. L. Brooks, R. S. Hawke, J. K. Scudder and C. D. Wozynski, Design and Fabrication of Large and Small Bore Railguns, IEEE Trans. Mag., vol. Mag-18, No. 1, pp. 68-81 (Jan. 1982).
R. Burton et al., Peformance of a Self-Augmented Railgun, J. Appl. Phys., vol. 10, No. 7, pp. 80-84 (Jan. 1991).
M. Cowan, Pulsed Power for Electromagnetic Launching, IEEE Trans. Mag., vol. Mag-18, No. 1, pp. 145-150 (Jan. 1982).
F. J. Deadrick, R. S. Hawke and J. D. Scudder, Magrac--A Railgun Simulation Program, IEEE Trans. Mag., vol. Mag-18, No. 1, pp. 94-104 (Jan. 1982).
D. W. Deis and I. R. McNab, A Laboratory Demonstration Electromagnetic Launcher, IEEE Trans. Mag., vol. Mag-18, No. 1, pp. 16-22 (Jan. 1982).
D. W. Deis and D. P. Ross, Experimental Launcher Facility-ELF-I: Design and Operation, IEEE Trans. Mag., vol. Mag-18, No. 1, pp. 23-28 (Jan. 1982).
H. D. Fair, Jr., Electromagnetic Propulsion: A New Initiative, IEEE Trans. Mag., vol. Mag-18, No. 1, pp. 4-6 (Jan. 1982).
C. M. Fowler, D. R. Peterson, R. S. Caird, D. J. Erickson, B. L. Freeman and J. C. King, Explosive Flux Compression Generators for Rail Gun Power Sources, IEEE Trans. Mag., vol. Mag-18, No. 1, pp. 64-67 (Jan. 1982).
R. Hawke, Railgun Accelerators for Launching 0.1-g Payloads at Velocities Greater than 150 km/s, Lawrence Livermore Lab. Rep. No. CONF-790741-1 (Jun. 15, 1979), DOE Impact Fusion Workship GRAI8004, NSA0400.
T. James, Performance Criteria for EM Launchers with Solid or Transistion Armatures and Laminated Rails, IEEE Trans. Mag., vol. 27, No. 1, pp. 482-489 (Jan. 1991).
H. Kolm, Electromagnetic Accelerator Concepts, DOE Impact Fusion Workshop, Los Alamos, N.M. (Jul. 10-12, 1979), Available from NTIS, Springfield, Va. pp. 206-217 (1979).
R. S. Hawke, A. L. Brooks, F. J. Deadrick, J. K. Scudder, C. M. Fowler, R. S. Caird and D. R. Peterson, Results of Railgun Experiments Powered by Magnetic Flux Compression Generators, IEEE Trans. Mag., vol. Mag-18, No. 1, pp. 82-93 (Jan. 1982).
R. N. Kostoff, A. T. Peaslee, Jr. and F. L. Ribe, Possible Application of Electromagnetic Guns to Impact Fusion, IEEE Trans. Mag., vol. Mag-18, No. 1, pp. 194-196 (Jan. 1982).
C. G. Long, Fundamental Limits to the Velocity of Solid Armatures, Doctoral Dissertation, University of Texas at Austin, pp. 15-22 (Aug. 1987).
G. C. Long and W. F. Weldon, Limits to the Velocity of Solid Armatures in Railguns, IEEE Trans. Mag., vol. 25, No. 1, pp. 347-352 (Jan. 1989).
J. Marshall, Kaliski's Explosive Driven Fusion Experiments, DOE Impact Fusion Workshop, Rep. No. CONF-790741-6, NTIS LA-UR-79-1840, pp. 441-449, Los Alamos, N.M. (Jul. 10, 1979).
R. Marshall, Railgun Overview, DOE Impact Fusion Workshop, Los Alamos, N.M. (Jul. 10-12, 1979) Available from NTIS, Springfield, Va. pp. 128-145.
P. Mongeau and F. Williams, Arc-commutated Launcher, IEEE Trans. Mag., vol. Mag-18, No. 1, pp. 42-45 (Jan. 1982).
J. Parker, Muzzle Shunt Augmentation of Conventional Railguns, IEEE Trans. Mag., vol. 27, No. 1, pp. 80-84 (Jan. 1991).
P. B. Parks, Current Melt-Wave Model for Transitioning Solid Armature, J. Appl. Physics, vol. 67, No. 7, pp. 3511-3516 (Apr. 1990).
D. Peterson et al., Rail Gun Powered by an Integral Explosive Generator, Los Alamos Nat. Lab. Rep. LA-8000-C (May 1979).
I. M. Vitkovitsky, R. D. Ford, D. Jenkins and W. H. Lupton, Homopolar Current Source for Mass Accelerators, IEEE Trans. Mag., vol. Mag-18, No. 1, pp. 157-159 (Jan. 1982).
F. J. Young and W. F. Hughes, Rail and Armature Current Distributions in Electromagnetic Launchers, IEEE Trans. Mag., vol. Mag-18, No. 1, pp. 33-41 (Jan. 1982).

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