List of parts that can be found in any hardware store for the Sadar.

• 1 m of 40 mm (1.6 inches) pressure rated PVC pipe.
• About 8 cm (3 inches) of that same pipe.
• 70 cm (38 inches) of 50 mm (2 inches) pressure rated PVC pipe.
• A 3/4 inch threaded female female ball valve.
• Two 3/4 inch right angle threaded brass elbows
• Two 3/4 inch to 1 inch threaded brass reducers.
• Two 1 inch to 40 mm (1.6 inches) threaded PVC reducers
• One 40 mm (1.6 inches) to 50 mm (2 inches) PVC reducer.
• Two 50 mm (2 inches) female/female PVC sleeves.
• One 50 mm (2 inches) end cap.
• One bicycle or car tire valve.

List of parts for the RPG-2000.

• One 40 mm (1.6 inches) male PVC end cap.
• One Bicycle or car valve.
• One 100 mm (4 inches) 100 mm (4 inches) 40 mm (1.6 inches) 45 % male/female/female PVC "T" (see image at bottom.)
• One 100 mm (4 inches) female/female PVC sleeve.
• Two 100 mm (4 inches) 40 mm (1.6 inch) male/female PVC reducers.
• One 40 mm (1.6 inches) female PVC end cap.
• One 40 mm (1.6 inches) female/female PVC ball valve.
• Some 40 mm (1.6 inches) PVC tubing.

Assembly steps

1. - Screw on one side of the ball valve, a brass reducer and on the other, the two elbows (these must form a 180° angle). Note that if you are right handed, the reducer should be placed on the right side.
2. - Screw the other brass reducer to the end of the right angles.
3. - Screw the 1" to 40 mm PVC reducers on both ends.
4. - Glue on the 180° angle side, the 1 m PVC tube (this is the cannon). On the other side, glue the small piece of 40 mm tube.
5. - Glue the 40 to 50 mm PVC reducer to the small pipe.
6. - Glue a sleeve to this reducer.
7. - Glue the 50 mm pipe to the sleeve and glue the last sleeve to the end of the pipe.
8. - This is the hard part. Depending on the size and shape of your bicycle tire valve, drill a hole on the end cap so the valve fits in snugly. The trick is to keep it hermetic.

Use Teflon on the threaded parts. The bicycle or car tire valve can usually be found at car garages for free. You can sharpen the end of the cannon a bit so the potato is easier to insert. For a successful shot, the valve must be opened as fast as possible.

The cannon will need a bit of maintenance (changing teflon when leaking).

Here is a picture of the "valve end" of the cannon to help you

How to fire:

1. Insert a projectile into the barrel.
2. Close the valve and pump the reservoir through the special bicycle or car tire valve WITH AIR using a bicycle pump or a compressor. I suggest you use a manual pump instead.
3. Aim at a non-human or animal Target and release the valve as fast as you can to not loose any energy.
4. Have Fun!