Howitzer Potato Cannon

Step 12: Operation

First, set up the mount and fix an elevation. Then attach the cannon to the mount and make sure it is secure. Insert a burst disk made of tin foil into the steel union.

Charge           Fuel Pressure in Meter (PSI)        Air Pressure in Chamber (PSI)
x1                     30                                                       15
x2                     60 or 2 charges of 30                     30
x3                     90, or 2 charges of 45                    45
x4                     2 charges of 60                               60

To operate the cannon, first open the propane valve and measure a certain pressure into the meter. Release this into the chamber and use an air compressor to add a certain pressure of air into the chamber. For more information see http://www.spudfiles.com/spud_wiki/index.php?title=Stoichiometric

Then stand aside, turn the stun gun on, press the button, and listen to the boom.