Materials Needed
1 - 2' X 2' piece of 3/4" plywood
2 - 2' long 2" X 4" boards
1 - metal electrical box
1 - No. 4 test tube stopper
1 - 3" truck valve stem
1 - metal washer
1 - hose clamp
1 - industrial adhesive (E6000 or similar)
1 - 18" - 1/8" metal dowel
Assembly
Nail the 2"X4"s to the edges of the plywood. This
is the base. Drill a hole through the center of
the no. 4 test tube stopper just large enough for the
truck valve stem to pass through. Drill a hole
through the plywood and electrical box just large enough
for the valve stem. Stick the valve stem through
the stopper, washer, electric box, and plywood.
Use the adhesive to help hold it in place. Attach
the hose clamp to the valve stem sticking through the
bottom of the plywood base. Tighten.
Bend the metal dowel in a U shape. This is the
firing pin. Slightly warp the firing pin so that
when the pin is slid through the holes in the electrical
box, it will hold the lip of the plastic bottle down on
the test tube stopper.
This launcher will fit 2 liter
plastic bottles, or any other bottle with the same size
neck.
Construction Photos
Rocket Night
Photos
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