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Electronic Gadgets for the Evil Genius, 2nd Edition by Robert Iannini

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CHAPTER 19
Hydrogen Howitzer
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Overview
This device (Fig. 19-1) is capable of firing a 50-millimeter projectile (Fig. 19-2) over 500 meters using ordinary tap water. The howitzer section is built from materials available from hardware stores. The design as shown was done by one of our more creative technicians and could be a museum piece. The howitzer has many extras, including a laser sight. The design of the actual barrel, chamber, and firing mechanism must be followed, but that of the remaining assembly can be at the builder’s discretion. Plans include photos, schematics, and drawings to complete this fascinating and fun project.
  Figure ...

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