Category Archives: Interior ballistics

Notes about valves and flow rates

Comparing valves for compressed gases can be difficult for several reasons. Even if you are familiar with how valve performance is specified, you can easily make mistakes. Valve performance is specified in several different sloppy and confusing ways, almost always in non-metric units. The worst part is that valve performance can be specified in obvious […]

Nerf Engineering notes

I’ve started organizing my writings and thoughts on Nerf ballistics into a set of notes (link corrected). Readers of my blog might be interested. For the moment my notes are very rough and incomplete. I’ll update the PDF as I make changes. I’d appreciate any feedback, especially corrections and ideas. Edit (2012-10-02): I’ve removed the […]

boltsniper’s optimal barrel length formula

Whenever there is a thread about one of the holy grails of Nerf ballistics, an equation for the barrel length that maximizes performance, someone is bound to mention the results of some tests boltsniper did in 2005 when he was designing the FAR. boltsniper, for the uninitiated, is one of the few engineers in the […]

Banding rubber bladders

When a Nerfer wants to increase the pressure of a bladder, they generally turn to “banding,” the layering of rubber bands on the bladder. I came into this hobby from the similar water gun hobby, and I’ve often wondered why this method is so prevalent in Nerf but not water guns. It’s not that layering […]

Pneumatic gun model on NerfEngrWiki

While what I have posted is far from complete, I have started posting a derivation of a relatively simple model of a pneumatic gun on NerfEngrWiki. Feel free to use the comments section to ask questions, etc., if you have any. I don’t suspect many people will have questions, but I do know a few […]