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Barry's Coilguns

Mark 2

  1. Introduction
  2. Hints and Suggestions
  3. RLC Simulation
  4. RLC Analysis
  5. LC Time Sim
  6. Inductor Sim
  7. Wire Loop
  8. Java
  9. Photographs
  10. Schematic
  11. SCR
  12. Construction
  13. Result: Position
  14. Result: Turns
  15. Result: Length
  16. Result: Iron
  17. Result: Tube
  18. Result: Voltage

Mark II Results - Starting Position

How does the performance depend on the projectile's starting position?

Projectile's Starting Position

Graph of speed versus projectile starting position The exit speed is quite sensitive to the projectile's precise starting position. It takes only a few millimeters further in or out to gain or loose significant speed. This graph shows the measured speed compared to how far the projectile was inserted into the coil.

Dist (x) Muzzle Speed
18.6mm   4.46 m/s
20.4 4.67
21.5 5.00 m/s
22.5 4.73
24.0 4.26
26.8 3.73
28.5 1.25

Conclusions

A projectile's starting position must tuned to be within a 2mm range to achieve optimum results.
 
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