Marble Cannon

Marble Cannon by Logan Jones and Henry Smith

Physics 5A

Step 1: Gather Supplies

• 2 Headbands
• 1 20 in x 5 1/2 in piece of wood
• 2 12 in x 3 1/4 in pieces of wood
• 2 feet of PVC pipe
• 1 17 1/2 in Dowel rod
• 1 Threaded pipe
• 4 Nuts
• Electrical Tape
• Hot glue and hot glue gun
• 6 screws
• 2 eye screws

Step 2: Drilling the Dowel Rod

1. Drill a hole that will fit your threaded rod 4 inches from the base of your dowel rod to provide room to grab onto it.
2. Once the dowel rod is drilled, insert the threaded rod into the hole and screw on a nut on each side of the rod.
3. Put the other nuts onto the threaded rod about a 1/2 inch away from the first on. This is where you will place your headbands
4. Tape the ends of the threaded rod off to stop the nuts from slipping off or moving.

Step 3: Constructing the Base

1. Take the 20 x 5 1/2 board and measure 10 inches from the end. This is where your stand that will hold your cannon will start.
2. Repeat on both sides of the board

Step 4: Putting the Cannon Together

1. Cut your 2 feet of PVC pipe into a 18 inch piece and a 6 inch piece. The 18 inch piece will be the cannon barrel and the 6 inch piece will be its turning point.
2. Drill 2 screws into the side of the base, while holding the PVC pipe in the middle of the screws.
3. take the 18 inch piece and glue it to the 6 inch piece to prepare it for taping.
4. Wrap the two together with electrical tape until you have a solid base. The more the better.

Step 5: Shooting Mechanism

1. Drill the eye screws into both sides of the base. These will hold one end of the headband during the firing process.
2. Place the Dowel rod into the end of the 18 inch piece of PVC pipe. The opposing end of the barrel will be where the marble comes out
3. Tie the head bands around the eye screws and pull back to the end of the threaded rod in between the 2 nuts

Step 6: Math