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Found 4 results

  1. Hi as most of you know who are in the gun community a bunch of AR 70/90 kits came into the country and theirs still no barrels or receivers in production. Since I cant find anything I decided that I'm just going to make my own barrel and I've found the measurements from a guy on reddit who lives in Italy. https://imgur.com/gallery/WUtxuAP https://imgur.com/gallery/1ydhDUS As I was getting the measurements a curiosity ran through my head, how do you mathematically figure out the proper diameter of the gas port hole for the gas block in the barrel?
  2. So my mind wandered off the other day and I started thinking about bolt carriers, recoil springs and caliber conversions. I feel kind of ignorant for not getting this completely straight, but I'm wondering if I'm missing something. Let's say you'd have an AR-style rifle chambered in .308, and you'd convert it to .223 with a swap of the bolt head and the upper receiver. Let's ignore the magazine issue for this discussion. I'd imagine that the optimal bolt carrier velocity is the same regardless of cartridge (within some reasonable limit). Thus it should be perfectly possible to compensate fo
  3. I found a bunch of my chemical engineering texts that I had PDFs for. I put them on my Google drive, so if anybody is interested, here's a few links. Let me know of if these links actually work. I've been reading through my Reactor Chemistry text when I have downtime at work. Glad I finally am getting around to reading it. Introduction to Engineering Ethics Elements of Chemical Reaction Engineering, fourth edition Fundamentals of Heat and Mass Transfer Numerical Methods for Engine
  4. I've posted this on SomethingAwful before, but here's a repost for those of you who haven't given Lowtax tenbux. Warning: it's very long. The Swedish original is called JA 37: pilot och system and is a transcript of a witness seminar held at the Stockholm Museum of Technology in 2007, with a lot of old geezers who had worked on the development of both the Viggen and other Saab aircraft. A very brief glossary: - FMV is the Defense Materiel Administration, which was (and is) the government authority responsible for buying and developing all kinds of equipment for the Swedish armed forces.
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