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Portable Mass Driver

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Portable Mass Driver Presentation by: Brad Garrison – PowerPoint PPT presentation

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Title: Portable Mass Driver


1
Portable Mass Driver
  • Presentation by
  • Brad Garrison

2
Overview Mass Drivers
  • Classification of devices that use
    electromagnetic forces to propel an object
  • More efficient than existing means of propulsion.

3
A Brief History of Mass Drivers
  • Current Development
  • Navy/Army Research
  • Amateur Research

4
Future Possibilities
  • Peaceful Uses
  • Military Uses

Ground Based Mass Drivers Orbital Mass
Drivers Spacecraft Based Mass Drivers
Rail Guns Electro Thermal Chemical Guns
5
Types of Mass Drivers
  • Rail
  • Coil
  • Gauss
  • Disk

6
Project Motivations
  • Interest in electromagnetism
  • Little research being conducted
  • Current designs are repetitive

7
Project Goals
  • To construct a Gauss/Coil Gun that is portable
    and easily operated
  • For the projectile to have a muzzle velocity of
    approximately 50m/s
  • All components will be powered by a single
    rechargeable battery
  • High rate of fire (60rpm)
  • Extremely durable
  • Completely safe for anyone to use

8
Possible Designs
  • Coil Gun
  • Rail Gun

9
Rail Gun Limitations
  • High recoil force
  • Extremely high temperatures
  • Armature vaporization
  • Expensive materials
  • More applicable to larger designs

10
Coil Gun
  • Lower operating temperatures than Rail Gun
  • No projectile vaporization
  • Lower, more manageable recoil forces

11
Drawbacks of Existing Designs
  • Most are driven off of AC power making
    portability impossible.
  • DC designs operate at a much reduced power.
  • All have a very low rate of fire
  • Most are dangerous to use
  • All are very fragile
  • Capacitors used are expensive and heavy

12
Preliminary Design Complications
  • Barrel must be strong enough to withstand
    compressive force of the coil
  • Capacitor banks can not provide pluses fast
    enough for the desired rate of fire
  • Capacitors may fail after repeated use
  • Heat build up

13
Initial Design
14
Initial Design Complications
  • Induction coil produces high voltage pulses not
    high current pulses
  • Electromagnets will drain the battery even in
    standby mode
  • Optical gates will further drain battery and
    introduce more fragile components into the design
  • Microprocessor vulnerable to magnetic fields and
    heat

15
Second Design
  • Induction coil replaced with photo capacitors
  • Electromagnets replaced with permanent magnets
    utilizing principals of the Gauss Rifle
  • This eliminates the need for photo gates as well

16
Second Design
17
Charge Booster
  • (example is using a bank of 20 1.2V 0.25Amp AA
    batteries)

18
Charge indicator
  • The indicator will signal when the capacitor is
    fully charged

19
Parallel Charging
20
Resonance Charging
  • Resonance charging will be used to conserve
    energy and to decrease the charging time

21
Possible Problems
  • Fragility of permanent magnets
  • Resistive heating of the coil
  • Over working the capacitors
  • Battery life

22
Future Improvements
  • Optimized coil
  • Heat sinks
  • Improved indicators

23
Conclusion
  • Coil guns are not practical for portable designs.
  • Superconductors
  • Specialized Capacitors/Semiconductors
  • New coil designs
  • Advanced batteries

24
References
  • 1. anothercoilgunsite.com
  • 2. coilgun.com
  • 3. powerlabs.com
  • 4.mgc314.home.comcast.net
  • 5. scitoys.com

25
Questions?
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