Introduction: Marble Cannon

Alex Jasser and Isabel Biasella

Step 1: Gather Materials

2 ft 1/2 inch PVC pipe

1/2 inch dowel rod

4 rubber bands

6 screws

4 nuts

1 threaded rod

Wood base

Wood stands

Electrical Tape

Hot glue

Step 2: Make Measurements and Cut

Measure and cut out 2- 10-inch wood sides

Measure and cut a 5.5 by 10 inch base of wood

Measure and cut a 13.5-inch dowel rod

Measure and cut 18 inch PVC pipe, now you have an 18 inch and 6 inch pipe

Step 3: Assemble

Drill a hole on the bottom of each side of the wooden base and screw in a wooden stand on each side.

Drill a hole at the top of each wooden stand and screw in the 6 inch PVC pipe

Leave two screws barely attached to the top of each side of the wooden stands

Put the dowel rod through the 18 inch PVC pipe

Drill a hole about 4 inches from the bottom of the dowel rod and put the threaded rod through the hole

Attach a nut on both sides of the threaded rod

Hot glue the 18 inch PVC pipe to the 6 inch PVC pipe

Wrap electrical tape around the PVC pipes to stabilize the hot glue.

Attach two rubber bands on both sides from the outer screws to the threaded rod

Secure the rubber bands by placing a nut on the outside of the rubber bands

Step 4: Test Shoot and Make Increments on the Dowel Rod (Optional)

Test shoot the distances that you could be required to shoot

Make a mark how far you pulled back on the dowel rod if you hit the target for each distance

Don't let Leah test shoot your cannon and get a marble stuck in it

Step 5: Actually Test

Shoot from the distances that Boey gives you and hit the target.

Step 6: Math