I'm now going to make it hard - JSR does tend to know his stuff, but the UK law is more complex than than his post says. Wise, Roger (2003-10-29). "Solvent welding of thermoplastics". TWI. Archived from the original on 2008-02-12 . Retrieved 2009-06-01. Promotional sports cannons: Portable pneumatic cannons which run on bottled CO 2 are common at large sports games in the U.S. where they are used to project items such as T-shirts or wrapped food into the audience. Such cannons can be dangerous: the Phillie Phanatic injured a fan with a hot dog cannon in June 2018. [24] Such "air cannons", as they are often called, tend to be made of higher-quality materials than an average pneumatic spudgun, but they use the same methods of operation.

schmanman; etal. (March–April 2007). "(NEW) S.W.A.T v.3". SpudFiles. Archived from the original on 17 April 2013 . Retrieved 16 August 2011. Cannon with a calculated range exceeding 1 mile. Pneumatic line throwers for launching lines for rescue missions or between ships for replenishment at sea as well as a number of other applications. The difficulty in breaking the barrier arises from the speed of the particles within the gas. The projectile cannot travel faster than the gas particles, which are limited to travel at the speed of sound. The problem is solved by increasing the speed of the particles, either by: Arabe, Katrina C. (23 April 2001). "A Dynamic Duo: Thermoplastics and Compressed Air Systems". Industry Market Trends. ThomasNet News . Retrieved 16 August 2011. I have heard of people being given clips on the ear for it, and even some cases of the armed response unit being called, which may well have included arrests, but bear in mind, that relates just to people I've spoken to on the internet - a very small minority, and generally a more sensible one, and if even they can get the ARU on them...Heating the gases to far higher temperatures, and thus giving them more energy. This allows hybrids and combustions to achieve supersonic velocities. The recoil of such cannons can be very great due to the high pressure combined with the large internal diameter piping needed for the bottles (5–9cm; 2–3½ in) resulting in them being ill-suited for hand held firing. Killjoy (25 April 2007). "FEAR". SpudFiles. Archived from the original on 27 February 2015 . Retrieved 2009-06-01. Bird scarers: these devices are essentially automatic combustion cannons. They require bottled propane gas and a lead-acid battery. At intervals they ignite a propane/air mix to produce a loud explosion (up to 150 decibels close to the device [ This is not how sound pressure level is measured, clarification needed]) to scare birds from crop fields or near airport runways.

jimmy163 wrote:Does anyone know of anyone who has ever been arrested in the UK for owning or using a combustion cannon? The Simpsons character Maude Flanders was killed by air-cannon launched T-shirts in the eleventh season episode, " Alone Again, Natura-Diddily". In some jurisdictions spud guns are outlawed or have restrictions on their use and may require licenses and certification of the gun. It is almost certainly a firearm under UK law. It uses expanding hot gas to fire a projectile. But it would seem that if you aren't stupid with it and you only fire it in the middle of nowhere, most people will turn a blind eye to it (not the best phrase to use I know). I used to work in the firework industry where there are lots of laws written down by the Health & Safety Executive, and to be honest nobody still knows for sure what they can and can't do. So getting a definitive answer for something that is in a very grey area will be nearly impossible. As a barreled launcher capable of over 12 ft/lbs, it's technically illegal without a firearm certificate, and since obtaining a FAC involves proving you have suitable land and a good reason to own it, I doubt "launching vegetables" quite qualifies.

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The video game Scrap Mechanic has 4 variants of spud guns: a single shot spud gun, a double barrel spud shot gun which fires French fries, a 'spudling' gun which is a triple barrel Gatling gun, and a mountable spud gun which can be mounted on your creations. Barker-Griffith, Ann E.; Streeten, Barbara W.; Abraham, Jerrold L.; Schaefer, Daniel P.; Norton, Sylvia W. (1 March 1998). "Potato gun ocular injury". Ophthalmology. 105 (3): 535–538. doi: 10.1016/S0161-6420(98)93039-1. PMID 9499787 . Retrieved 15 August 2011. A spud gun is not considered a firearm unless it fires a projectile faster than 152.4meters per second and at a muzzle energy exceeding 5.7 Joules based on the definition of a firearm in the Canadian Criminal Code. [2] A spud gun may be interpreted as an imitation firearm, and therefore it would be illegal to have it in possession in a public place. The spud gun would most likely be considered a dangerous weapon, and therefore if an offense is committed with it, a possession of a dangerous weapon charge could be issued.

The small toy gun that would fire pellets of potato at high velocity. You had to push the barrel of the gun into a potato and gouge out a tight fitting pellet then squeeze the handle as hard as you could to pop the potato out of the end. You couldn't do any damage with them and the ammunition was cheap - every parents answer to a request for an airgun. The potato cannon can trace its origin to the World War II-era Holman Projector, which was a shipboard anti-aircraft weapon. [7] Launcher types [ edit ] Sorry to post in this topic, but not too sure else where it would go. Seeing as I vaguely describe HOW a Potato Cannon works, I thought here would be the best topic. ;)

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Downie, Neil (2006). Exploding Disk Cannons, Slimemobiles, and 32 Other Projects for Saturday Science. The Johns Hopkins University Press. p. 5. ISBN 9780691149660.

They're considered a pressure bearing part of a firearm, so the VCR Act prevents their sale other than in face-to-face dealings. Aluminium: Aluminium is a lightweight metal with good corrosion resistance. Aluminium pipes are sometimes used as barrels on spud guns on their own and machined aluminium is a popular material for particularly unique designs.In Germany, a spud gun does not differ legally from any other firearm (for ones that use combustion to propel the projectile) or air rifle. The manufacture, acquisition and possession is therefore subject to the same requirements as for any other weapon of the same category. Since there is no known model developed before 1871, which would classify that model as an antique, spud guns are not subject to the eased regulations regarding antique weapons. Therefore any non-combusting spud gun with a maximum projectile energy of 7.5 joules can be owned by anyone without a license, while their manufacture still requires one. The legal possession of any other such weapon requires a gun license. The dry ice bomb used for propulsion can achieve bursting pressure in a matter of seconds to hours depending on the quantity of water and dry ice. If too little dry ice, it also may not achieve bursting pressure at all. These timing issues can cause belief that the cannon has failed to fire but attempting to unload the cannon may then provide the extra stress on the bottle needed for it to rupture. Sprinkler valve (otherwise known as a solenoid valve): The use of irrigation sprinkler valves as pneumatic valves has become increasingly popular for spudgunning. These valves are intended to be electrically triggered causing a solenoid to depressurise a diaphragm and allow airflow through. It is also possible to remove the solenoid and, instead, to actuate the valve manually with a blowgun to depressurise the diaphragm. Such modifications allow the valve to open as much as 3 to 5 times faster. This article's lead section may be too short to adequately summarize the key points. Please consider expanding the lead to provide an accessible overview of all important aspects of the article. ( February 2021) The Spud Gun is an old fashioned toy given new life. It's a miniature lethal vegetable weapon (there's a sentence I bet you never thought you'd read), which scoops bits of potato out of… well, a potato, and fires them at high pressure at whoever you aim at (unless you're a reaaaaally bad shot).