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Naval EM Railgun Innovative Naval PrototypeJuly
2007
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DISTRIBUTION STATEMENT A. Approved for public
release distribution is unlimited
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EM Railgun A Game Changer

• Why is it important?
• Missile ranges at bullet prices
• Persistent, volume precision fires
• Time Critical Strike
• All weather availability
• Variety of payload packages
• Scalable effects
• Deep Magazines
• Greatly simplified logistics
• No IM (Insensitive Munitions) Issues
• Leverages Navy Electric Ship Investment
• Increases Ship Design Options

• What is it?
• Gun fired with electricity rather than gunpowder
• Non explosive round/No gun propellant
• Revolutionary 250 mile range in 6 minutes
• Mach 7 launch / Mach 5 hit
• Highly accurate, lethal GPS guided projectile
• Minimum collateral damage
• When?
• Feasibility Demo 2011
• System Demo 2016
• IOC 2020-2025

• Validation of Requirement
• USMC - Fire Support Requirements Hanlon Letter
  2002
• Dept of Navy - ST Corporate Board 2005
• CNO Letter to Senator Warner 2006
• Commandant, USMC - Report to Congress 2006
• Navy Warfare Development Command - Operating
  Concept 2006
• Transition
• Program Executive Office - Integrated Warfare
  System

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EM Railgun Game Changing
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Naval Railgun Key Elements
Launcher
Projectile
Boeing
Govt
Draper
GA
BAE

• Multi-shot barrel life
• Barrel construction to contain rail repulsive
  forces
• Thermal management techniques
• Muzzle arc management
• Mount integration

• Electronic hardening (45 kGee acceleration, EMI
  Potential)
• ILP gun launch survivability
• Parasitic mass of launch package
• Endo/Exo flight (control, aero-thermal,
  accuracy)
• Lethality mechanics

Ship Integration
Pulse Forming Network (PFN)

• Dynamic Power Sharing
• Space and Weight
• Thermal and EM Field Management

Capacitors or Rotating Machines

• Energy Density
• Repetition rate firing thermal management
• Switching
• Torque management and multi-machine
  synchronization (rotating machine)

Blue INP Phase I Orange INP Phase II
Green Army Focus
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Path to Integrated System Demo
INP I
INP II
EM Lab Gun for Bore Life Development
INP Phase I EM Railgun Demonstration Launcher
INP Phase II Long Range Integrated System Demo
INP Phase II EM Railgun Demonstration Launcher
Launcher Technology Dev.
Launcher Trades Concept Dev.
Endo-ExoTesting
ILP Interfacein bore dynamics
Projectile Trades Concept Dev.
Mid-Range
Long-Range
TerminalRange
ElectromagneticTest Facility
Railgun ILP Tests
Terminal High Velocity Powder Gun
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ONR INP Phase 1 Objectives

• Traceability to 64MJ, 6-10 round / min indirect
  fire weapon system
• Bore Life
• - 32 Mega-Joule (Muzzle Energy) EM Lab
  Launcher
• - 10kg launch package full muzzle velocity of
  2.5km/sec
• - 20kg launch package with full current of
  5.5MA
• - Demonstrate more than 100 shot bore life
• Containment
• - 32 Mega-Joule Advanced Containment Launcher
• - 10kg launch package full muzzle velocity of
  2.5km/sec
• - 20kg launch package with full current of
  5.5MA
• - 1000 round predicted containment structural
  barrel life
• - Design for thermal management at a rate of 6
  round / min
• - Design launcher for minimal round dispersion
• - Transportable on pallets and/or in sea
  containers
• - Consider marine environment

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ONR INP Phase 1 Program
ST Go No Go Decision Point
Initial 8MJ Test Capability
World Record Launch - 11MJ
Initial 16MJ Test Capability
Program Initiation Aug 05
JUL 07
32 MJ LAUNCHER 100 SHOT BORE LIFE DEMO
Launcher Bore Life Development
BAE
32MJ Lab Gun For Bore Life Development
A
Modeling Simulation VV
General Atomics
B
General Atomics
AdvancedContainment
Exercise Options
32 MJ ADVANCED CONTAINMENT DEMO
C
Detail Design Fabrication
Concept Design
Technology Development Preliminary Design
100MJ Capacitor Bank For Launcher Testing
33MJ
33MJ
EMLF Test Facility NSWCDD
33MJ
Advanced Capacitor Development
General Atomics
Rotating Machine Component Development
Continuing Army Efforts
Multiple Awards
Boeing DraperGovernment
Integrated Launch Package (ILP) Development
Projectile Trades Develop 4 Year Plan
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Launcher and Projectile Thrusts

• Launcher Technology
• Bore materials and geometry
• Advanced containment techniques
• Develop Integrated Launch (ILP)
• Armature
• Sabot, bore riders
• Nominal projectile shape
• Critical Focus Areas
• Launch survivability
• Hi-Gee GNC
• Leverage Other Programs
• Conventional Guided Munitions
• Re-entry Flight Body Vehicles

Full Bore ¾ Length Full Current Full Mass
Full Velocity ½ Mass
Launcher
Advanced Containment
ILP In-Bore Dynamics
Projectile
Flight Body Aero-Thermal Guidance Scheme Lethality
GNC
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Ribbon Cutting
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Railgun INP Contact Information
Dr. Elizabeth DAndrea (Program Manager) Office
of Naval Research (Code 352) 875 N. Randolph
Street Arlington, VA 22203 703.588.2962 dandree_at_on
r.navy.mil Mr. Roger Ellis (Technical
Director) Office of Naval Research (Code 352) 875
N. Randolph Street Arlington, VA
22203 703.696.9504 ellisr_at_onr.navy.mil