You can build a cannon out of a heavy wall cardboard packing tube. Glue a wooden plug in the end, drill a vent hole, load it with a tablespoon of black powder and a wad of newspaper, put a fuse in the hole and light it. This cannon is used on the U.
M1A1 main battle tank. Chanel Ayaou Pundit. Can you use starting fluid in a potato gun? Starting fluid or battery terminal cleaner, along with a 3 second shot of breathing air from a SCBA bottle seems to work just fine.
I always used starting fluid , but it seems very sensitive to air fuel ratio. Too much or not enough and it won't fire. Saer Mottram Pundit. What is the most flammable hairspray? Trsemme hairspray. Alida Western Pundit. Are potato guns legal in New Jersey? Spud guns are illegal to possess by persons under the age of 16 in New York. Spud guns are considered firearms in New Jersey if the mechanism for propelling the potato is combustion.
Nasera Secreto Teacher. Mobile Newsletter banner close. Mobile Newsletter chat close. Mobile Newsletter chat dots. Mobile Newsletter chat avatar. Mobile Newsletter chat subscribe. Prev NEXT. Home Improvement. They built a potato cannon consisting of a combustion chamber, an electronic trigger and a transparent barrel. Firing the device is a simple matter of filling the combustion chamber with a mixture of air and pulling the trigger. They then plotted the position of the potato in the barrel against time and calculated the exit velocity when it left the muzzle.
They repeated the experiment five times for each propellant. The results point to a clear winner. Propane, ethanol, methanol and butane all produce muzzle velocities of between 28 and 48 metres per second. But acetylene is in a class of its own, producing a muzzle velocity of metres per second. The Courtneys make absolutely clear that this kind of cannon is extremely dangerous and potentially lethal. But it could conceivably be used to design better cannons for…err..
How do I fix this? Just before the firing and loading of each round, take the back off, and wave it back and forth to force air into it, then load immediately after. The potato will squish it, but it could damage to other things and make a mess!
Not Helpful 22 Helpful If I used a chemical igniter, could I make a gas depot and, therefore, not have to reload hairspray since no leftovers would block the ignition? Not Helpful 15 Helpful If your cannon can be handheld, then it would be able to fit on a vehicle.
I'm assuming you mean "ram" as in ramming into things, in which case I would use a stronger set of pipes to avoid instant damage on impact. I would then attach a strong metal object to it, like a sledgehammer head, and drill a hole in it that matches the diameter of the barrel.
Not Helpful 5 Helpful Include your email address to get a message when this question is answered. By using this service, some information may be shared with YouTube. If your local hardware store does not have the exact fittings listed, don't worry. You will probably be able to find a way to use similar parts i. Helpful 4 Not Helpful 1. There are plenty of instructions for different models online. Do a keyword search for "Potato Cannon instructions.
Helpful 5 Not Helpful 2. Follow the directions on the glue, and glue liberally on both the pipe and the socket. Do not use glue or plumber's dope on threads. Helpful 3 Not Helpful 1. If something needs to be sealed shut, use duct tape. It starts out as tape, but after you use the cannon the adhesive turns into a very sticky glue that keeps stuff closed.
Helpful 4 Not Helpful 2. The volume of the combustion chamber is proportional to power of the shot, but a long chamber produces an inefficient compression wave, so keep the combustion chamber short and fat. If you have never worked with PVC before, buy some scrap PVC and a few cheap couplers so you can practice gluing before you build your launcher. Helpful 4 Not Helpful 3. Dry fit the parts before you glue them.
This means loosely assemble the gun without glue or anything permanent to make sure that you have all the correct and functioning parts. Helpful 5 Not Helpful 5. Try new ammunition! Potatoes are plentiful, but similar sized fruit and vegetables may work just as well. Helpful 3 Not Helpful 2. The initial ignition in the combustion chamber should be close to the center of the chamber cavity to make an efficient explosion. Helpful 3 Not Helpful 3. The longer the barrel, the longer the force of the combustion will accelerate the projectile.
Too short of a barrel will rob the gun of power. However, if the barrel is too long, the expanding gasses begin to lose pressure and friction of the projectile in the barrel begins to slow it down. Experiment to find the optimum length for your own configuration.
Helpful 1 Not Helpful 1. Submit a Tip All tip submissions are carefully reviewed before being published. Make sure you glue every single fitting. If you don't, the gun will fly apart when you fire it and you risk serious injury. Helpful 4 Not Helpful 0. Most accidents with these guns happen because an anxious builder does not let the glue dry.
Let it dry a full 24 hours before shooting. Make sure that you aren't ever looking down the barrel of the cannon or pointing it at someone when it's loaded.
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