The type of potato gun that you can build is really only limited by your imagination and budget. The types of propellants that your potato gun can use is either compressed air or a combustible fuel source like propane and aerosol sprays. Avoid using gasoline for your potato gun not only is it expensive but it is also not stable to work with so stick with propane or the aerosol sprays. Making sure the tubing is well constructed is also very important, the cannon has to be airtight so the fuel can compress the air. If you do not know how to test the pipe to make sure it is air tight put the pipe in a vat of soapy water and look for bubbles escaping from the piping. If you see lots of them then you have a leak in your pipe and need to seal it.

Once you know your potato gun piping is air tight then you can build the base to hold the cannon in place. The holder should allow you to raise the barrel, this allows you to change the trajectory of the potato gun thing of mortar launchers used in World War I&II similar principle just a different projectile. You can use a wooden base or metal for your potato gun whichever one it should be sturdy enough to hold the gun without wobbling.

Do not hold your potato gun like a Bazooka since it is not designed for that and you do not have enough experience with it to know how it will behave. When you are ready to assemble your gun it is a good idea to test the ignition system to make sure it is firing properly. You do not want to have a misfire during your first shot. Once the potato gun is put together it is time to take your test shot, aim for some inanimate object and load the gun with your potato. When you are adding the fuel to the gun try with a smaller amount and then work your way up testing different volumes. You want to find the right mix of air and fuel, when you hit the fire button the potato should come out. If it doesn’t and you do not hear a sound or see a flame then you may have an issue with your firing system.Disconnect the electrical systems power supply and then remove the firing system and test it again to make sure it is working fine. Once it is fixed then you can put it back into your potato gun and fire away.

The types of pneumatic cannon you can build really depends on your level of expertise and available resources. All pneumatic cannon have a few components that are the same regardless of the budget involved. The four common elements of your pneumatic cannon are a filling valve to allow air in. Then there is the air chamber which holds the air that will be released. Next is the pressure release valve which will allow the air to push the projectile out. And finally the barrel which allows the projectile to spiral out of the pneumatic cannon building critical speed in the process.

The type of barrel you use for your pneumatic cannon plays a major role on whether or not it will be effective and accurate. Most budget conscious builders rely on PVC piping as the material of choice for their pneumatic cannon. The reason that most people use this material is its relative inexpensive costs plus ease of sourcing for it. The inherent strength of PVC makes is very suitable for the rigors that are common when a person is using a pneumatic cannon.

When you are designing your pneumatic cannon a major consideration is how you are going to get the compressed air into the chamber for it to fire. If you have an air compressor you can attach it to the barrel. Attaching an air compressor does present some challenges since it can be cumbersome and expensive. What some pneumatic cannon builders do is use a CO2 cartridge as the air source for their testing needs.

In order for your pneumatic cannon to fire properly the entire unit must be air tight otherwise the air chamber that contains the compressed air will not be able to generate enough pressure to drive the potato out. The way you can test for leaks of the barrel is to immerse it in wet soapy water and then lift it out of the water. If you see air bubbles coming out of the barrel then you have a leak and it must be plugged.

When you do use a pneumatic cannon you must be aware that it has a tremendous amount of power behind it and you should never ever aim it at anyone else. The speed in which the projectile comes out can break glass and dent metal so it is something that is not to be taken lightly. If you follow the basic safety rules then you will have fun with the pneumatic cannon for years to come.

The components of a mini spud gun are virtually the same as the bigger brother version spud gun but the sizes are greatly reduced. One thing to note is to never underestimate the power of your mini spud gun. Even though it is tiny in size it can still do a considerable amount of damage if not respected.

When you are building your first mini spud gun you need to get a barrel to hold the projectile in place. A good rule of thumb for your mini spud gun is to have at least a yard or more of length, anything less than that will create issues when trying to fire. While on the subject of firing for your mini spud gun you will need to decide if you will be using compressed air or a combustible fuel such as propane or aerosol spray. If you are going the combustible fuel route for your mini spud gun do not use gasoline, not only is it expensive but it can create issues with misfiring.

In order for your mini spud gun to fire properly with a combustible fuel you need to have the fuel atomized other wise it won’t work. When fuel is not atomized and in liquid form it will catch on fire but will not explode with the compression needed to drive the potato out of the barrel. That is why propane and aerosol spray works so well since it comes out in an atomized form already.

When you have a fuel source for your mini spud gun you need a way to ignite it while not burning yourself in the process. The most effective way of doing this is by having a spark plug inserted in the back of your mini spud gun. Before you attach it make sure it works properly by testing the spark plug that is wired to a battery. Once you know the ignition system works it is one less thing to worry about with your mini spud gun.

When you take your mini spud gun out for the first time go to a field and set up some targets to aim for. Bring along a good supply of potatoes cut to fit your mini spud gun and then you will be able to add the fuel and test it.

Your spud launcher needs a barrel to shoot out of so you will need to decide between PVC or ABS plastics as the material of choice for your barrel. Most people prefer PVC for their first spud launcher due to its ease of use in finding and the inexpensiveness of it. Whichever material you choose make sure it is long enough otherwise your spud launcher will not achieve its full potential.

Once you have your barrel identified now is the time to select the type of fuel for your spud launcher you can use either propane or aerosol spray. The reason you want to use these is they are already atomized so it makes the combustion process easier. If you used gasoline you would need a device to atomize the fuel otherwise it would just burn inside your spud launcher and not create the controlled explosion needed to drive the potato out of your barrel.Another issue with different fuel sources is their costs. Aerosol spray can be found in pretty much any household so it makes it the choice fuel for the budding spud launcher builder.

Now that you have a fuel source for your spud launcher you are going to need a way to light it up. This is where an ignition system comes into play for your spud launcher project. You need to introduce a spark to the fuel mix when you want to fire the gun. What many first time builders do is take a spark plug from a lawn mower or something similar and connect a wire to deliver energy to the spark plug. Then connect it to a batter with a switch so you can fire the spark plug with a flip of a switch. Before connecting the ignition system to your spud launcher you should test it first. Nothing is more frustrating than troubleshooting your gun in the field so doing this proactive work now will make your life easier.

If you are able to see the spark on the ignition system test then you can mount it to the spud launcher. Now that the moment of truth is arriving you will need to select the finest potato for the job. Making sure to use a firm potato will give you the greatest range when firing your spud launcher . Don’t jam the potato too tightly inside the gun or it will not fire properly if at all and may back fire. The potato should slide in easily. Now you are ready to fire your spud launcher,have fun with it and do not be afraid to experiment with different fuel to air ratios and positioning of the barrel.

This may sound really technical but it is really easy to build a potato gun the hard part is making sure that everything is air tight. If your cannon is not airtight no amount of fuel is going to make it work properly so if you are on a budget you can use PVC piping for your needs. Make sure it is at least a few feet long if it is not your potato gun will not be long enough for the potato to gain enough speed to launch. Think of it like a shotgun, if the barrel is not long enough the bullet won’t travel properly or accurately.

Once you have your potato gun piping set up you will need to design your ignition system, if you are using compressed air it can be as simple as valve that is connected to a hose which you can activate. If you are using a combustible fuel such as propane or aerosol spray which works best then your potato gun must have an ignition system that generates a spark. It is not recommended to use steel wool and a battery, best to find a small spark plug and a batter with enough voltage to create the spark. Do not try to light the potato gun with a lighter even though it seems like the easiest way you want to give yourself a safe distance between yourself and the potato gun when firing the first time.

You want your potato gun to have a good quality potato in it so you get the best distance and control of your shot. Idaho potatoes are the best to use since they are firm and solid. When you put your potato into your potato gun it should be snug but not so tight it cannot budge. The reason for this is you want it to be snug enough for the pressure to drive the potato out of the gun. But not so tight that you have a back draft of pressure and the flame comes out the back of the gun.The best way to determine this is by trial and error with your potato gun the more you use it the better able you will be able to tweak it to get more distance and better accuracy from it.

The primary difference between a pneumatic cannon and a potato gun is the type of propellant that is used. With a potato gun petroleum based fuels are used where a pneumatic cannon uses compressed air to move the projectile from the mouth of the cannon. The pneumatic cannon is a bit more complicated that the average gun because of the need to keep everything airtight. The pneumatic cannon success is predicated on the ability to maintain a constant air pressure level.

Your pneumatic cannon will also need both a pressure release and filling valve for the compressed air to shot out of your pneumatic cannon with enough velocity to not only overcome gravity but hit the target. One of the most popular positions to hold a pneumatic cannon when firing it is like a Bazooka, on your shoulder so the source of the compressed air either from a CO2 cartridge or an portable air compressor.

Before you can load your pneumatic cannon for firing you need to make sure the system is totally air tight. Cover the cannon with warm soapy water and then lift it out and look for any leaks, If you see bubbles coming out then you have a leak and need to seal it.

Now that the pneumatic cannon has passed the first challenge of having an airtight chamber the next step is performing a test shot. Most pneumatic cannon enthusiast use a potato as their projectile of choice. The firmness of it and low cost presents many opportunities to fine tune your the distance and accuracy of your pneumatic cannon.

When in the field make sure to never point your pneumatic cannon towards anyone regardless if it is loaded or not. There have been reports of some pneumatic cannon reaching muzzle velocity of such great speed to cover 1,000 feet. So you can imagine the damage a person would feel with a projectile that has been shot over 1,000 feet.

Your first pneumatic cannon may reach or even exceed 1,000 feet of distance however the only way to achieve it is with tweaking it. When you change the amount of air being forced into the chamber and the positioning of the barrel even slightly it can have a significant difference on the results being generated.

Like all hobbies the building and use of a pneumatic cannon will give you hours of enjoyment. Since the options of creating the pneumatic cannon is only limited by your imagination and budget the results you get will be quite astonishing.

The mini spud gun is much like your standard size but with the added benefit of easily being transported. Your mini spud gun may have either a compressed air propellant from a CO2 cartridge which is awesome. Your mini spud gun can also use either propane or aerosol spray. You will need a strap to hold your mini spud gun on your shoulder not just for convenience but to help you find the sweet spot when you are aiming.

Before going out in public with your mini spud gun check with your local authorities to make sure it is allowable. Some cities have laws prohibiting any type of projectile firing weapons like the mini spud gun especially if it is armed with a CO2 cartridge which is the same thing use in paint guns.

If you do not have a mini spud gun yet you can build one very easily. The first thing you are going to need is a section of PVC piping that is a minimum of 3 feet long. The challenge with using a short piece of piping is it will not give the mini spud gun projectile enough distance to acquire the speed and accuracy necessary. You will need to make one of end of the cannon closed with a small opening for you to put your propellant in. Most mini spud gun like to use propane and aerosol spray since it gives them a greater range of options to test the limits of their mini spud gun.

Once you have the barrel of your mini spud gun established you will need to attach a strap to make carrying it easier. Since you will be using a flammable fuel there will be a need to ignite it somehow. You do not want to use a lighter for your mini spud gun it presents to many risks for injury so making an ignition system with a spark plug is your best option. You will need a length of wiring and a battery to power the spark plug. Before you attach the ignition system to your mini spud gun test it first to make sure it does work.

Now that the ignition system is on your mini spud gun you can go out and take it for a “test drive”. Make sure you go outside and do not aim the mini spud gun at anyone. After the first shot you can add or reduce the fuel mixture to get the optimum results.