4), some mechanism stores the energy for the dart, an airĬhamber (which I call a canister) which releases compressed air, and a barrel which holds the dart and However, achievingĭecent range while retaining practicality (speed, weight/size/mobility, and reliability) is a far moreĪll Blasters work on the same principles (fig. However, giving the dart a good enough velocity to launch it 70 feet is slightly more difficult, although itĬan be achieved in a very similar manner, a simple scaling of the above solution. 3) so anything made had to be simple (especially when coupled with myĭelivering air to a dart is not too difficult, and can be done with a simple pump, valve, and pipe easily. While I do have many tools available to me, I do not have any benchtop tools and only have hand toolsĪnd general power tools (fig. The cam would move forward and back as the gun is primed to index the drumīottom row center: Design created during gun construction on how to attach handles to the gun. The circles are representative of the pins which would stick out of the drum (see center of the page). The design on the far right is the general shape of the Middle row right: Design for the barrel indexing system. The locations where barrels would be placed in the dart storage mechanism The design for the front of the gun is in the center of the page The handle design is at the top of the page, left ofĬenter. Top row right: Design for the front of the gun and handles. The gun body design is on the center left. Top row left: Design for the gun body, plunger, canister, and trigger. Design sketches of various parts of the gun. Additionally, due to my lack of experience, everything in the gun needed to beĭesigned to be as simple as possible, lest I make a mistake and permanently damage the gun.įigure 2. However, this year, I wentīack to look through my design notebook and found the (very) early concept of this gun (fig. One from plans (FAR) and another one, a variant of another gun (SCAR-N). I have tried in the past two years to create one, This was my first time successfully making a Nerf Gun. Gun must be able to be fired accurately without the need of a stand (portable) An dart-holding system which can work well in most typical conditions/firing anglesĭ. Must be able to fire a dart every 3 secondsĬ. Must be able to fire multiple darts without needing to pause to reloadī. Gun will be able to be usable in a nerf warĪ. Gun must be able to fire darts moderately accurately (more accurately than a Nerf elite blaster)ģ. Gun will shoot at least 70 feet (maximum diagonal distance across my lawn) flatĢ. Techniques to compensate for my lack of precision tools.ġ. The importance and necessary flexibility of any engineering design and also unorthodox construction Gun, from its conception to its post-construction testing, was a huge learning experience, particularly in Post-completion, the defectiveĭart-storage system and any broken pieces will be repaired or re-created. Improvement but satisfied my design goals in both range and accuracy. Problems, many requiring creative or on-the-spot solutions. The construction of the gun was riddled with numerous Knowledge, are unique to this gun and were created to make the operation of these historicallyĬomplicated parts simpler to construct and use. The designs for both the trigger and the barrel-indexing method, to the best of my Materials and limited tools/machining ability, the physics behind dart blaster was examined, pastĭesigns were evaluated, both my own and from others, dart theory was investigated, and a design To create this blaster from a large variety of Resolved to create a superior homemade alternative. Often frustrated by inadequate performance (low range, low accuracy) of my commercial NERF guns, I 19ĭarts.20ĭart Physics.20Īlternative Darts.21ĭarts for the Future. Problems Encountered While Creating the Gun and their Solutions. 11ĭetermining the Dart Storage System.13ĭetermining the Trigger.14 9ĭetermining the Spring.10ĭetermining the Barrel Length. 5ĭead Space and Air Leakage.7Ĭreating a Gun Design.7ĭetermining the Gun Body Lengths.7ĭetermining the Materials Needed.7Ĭreating the Air Canister.8Ĭreating the Plunger.
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