Water Gun Results
Here is the spray pattern produced with the paper twelve inches from
the gun's muzzle. Fine spots cover most of the paper.
At 6" the pattern is tighter, but there are still spots over most of
At 2.5" a fairly tight spot is produced, with a spatter pattern radiating
out from the center.
The pattern at a distance of one inch was somewhat distorted by a crease
in the paper, but is similar to the 2.5" pattern.
At a distance of 1/2" from the muzzle the projectile is coherent enough
to pierce the paper.
With the muzzle placed against the paper, a clean puncture was produced.
Variation in the amount of liquid loaded, from 20 to 100 ml,
had little effect on the performance. Changing the inductor to a
100 mH unit, or using no inductor, had no discernible
After the shots described above, the gun was disassembled and inspected.
The tungsten center electrode and the inside of the stainless steel breech
were both severely eroded. The polycarbonate breech closure and the
alumina barrel were unaffected.
Given the poor performance and lack of durability of this design, I
have no further plans for it.
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