This is my second most powerful combustion gun.  If you are just beginning this hobby , then this is the page for you.  This is the most basic spudgun there is. It'll launch just about that you can cram down the barrel.  

I you are planning on constructing this gun, then go ahead and print out this entire page so as to save you the effort of dialing up the internet server every five minutes.

You will need:

Materials

• 1    36" length of 1 1/2" Schedule 40 PVC Pipe

• 1    13.5" length of 3" Schedule 40 PVC Pipe

• 1    3" Female Adapter (also called a cleanout trap)

• 1    3" Threaded Cap (also called a cleanout cap)

• 1    1 1/2" - 3" Bell Reducer

• 1    Igniter (see my ignition methods page for details)

• 1    Can of PVC Purple Primer

• 1    Can of PVC Cement

Directions

1. Take the 3-inch to 1 1/2 inch bell reducing brushing and glue* over one side of the 13-inch pipe.

2. Glue the 3-inch threaded coupling  (only smooth side) to the other side of the 13-inch pipe.  Be careful to keep glue out of the treads or else it will create some problems for you later.

3. Glue the 36inch piece to the other side of the reducing brushing. You should now have a completed gun, except for the igniter. See ignition methods page.

4. Wait overnight until the glue has dried! Remember safety!

5. Make a ramrod from old PVC pipe or an old broomstick.

6. Take a potato and shove into the barrel.

7. Use the homemade ramrod to push the potato down the barrel.

8. Spray some propellant into the chamber in second bursts (see propellants page)

9. Quickly screw on the end cap.

10. Brace yourself for the recoil of the gun.

14. Then sharply twist the igniter, or pull the ignition switch and... BOOM

If you aren't convinced that you are able to attempt this project yourself, then check out my products page.