StraightUp_OG Posted February 5, 2014 Author Share Posted February 5, 2014 Link to comment Share on other sites More sharing options...
ajg308 Posted February 5, 2014 Share Posted February 5, 2014 This thread produced a lot of cool stuff! Link to comment Share on other sites More sharing options...
blind bat Posted February 5, 2014 Share Posted February 5, 2014 Ohh boy, that is some grade A gun porn. OG, this has been one of my favorite threads on Enos. I can't wait to see what you come up with in '14. I'd love to see a video series of one of your builds from start to finish and I'd be more than happy to provide a donation to make it happen. You should post a midway wish list. Link to comment Share on other sites More sharing options...
a matt Posted February 5, 2014 Share Posted February 5, 2014 Great stuff from you and the gallery. Keep it up & good luck.. Link to comment Share on other sites More sharing options...
bmiller Posted February 5, 2014 Share Posted February 5, 2014 Do you have plans to try another AR lower? I was looking on the Tormach site, and stumbled across the Tech Shop site. (Sorry I don't know how to post links from my phone). Went and took a tour, it was awesome! The bonus is if you join as member, you are eligible for a 3year student package of Autodesk Inventor. They offer many classes which I intend on taking. I do not know if they are gun friendly Link to comment Share on other sites More sharing options...
jid2 Posted February 10, 2014 Share Posted February 10, 2014 (edited) Finally got around to one of the projects that's been on my list since last year - build my own compensator. I'll likely make a more detailed post in either the open gun section or the gallery and post some video, but here's the short version. I have an Akai comp on my gun, which is stainless, and it is so friggen heavy, so I knew I wanted to use Titanium. I also wanted to use computational fluid dynamics (CFD) analysis to design the size of the ports. With the help of one of the members on the forum here I got my CFD model all setup and running nicely and went through about 30 design iterations. Then I used the machine at work with the 4th axis to carve the comp out of Ti. It was my first time machining Titanium, it is tough stuff. I'm used to ripping in Aluminum, but you've got to slow everything way down for Ti. Started with it upright in a 5C collet to drill the main hole, and then thread mill the threads. Took about a billion adjustments to finally get an absolutely perfect, tight fit on the barrel threads. Once threaded I stuck it into the 4th Axis in a 5C collet and cut the side and bottom flats, as well as the side bleeder vents. 1st port cut 2nd port Edited February 10, 2014 by jid2 Link to comment Share on other sites More sharing options...
jid2 Posted February 10, 2014 Share Posted February 10, 2014 (edited) 3rd and final port. Then with some parting cuts on each side it is all finished, just hanging on by a .010" thick web that you break free and clean up with a facing path. Done. This ended up about .35" longer than I had planned, but the data said make it longer, so I listened. The ports have draft on certain walls to increase efficiency as the gas expands. This thing is also really hogged out, the ports are wider and general wall thickness is at a minimum. I wanted this thing to be really light. Weight vs my old comp. The new Ti comp is .112 lbs (1.78oz), my old stainless Akai was .162 lbs (2.59oz), a Brazos Thundercomp is 2.8oz, Cheely is 1.9oz. So this may be the lightest comp out there, and based on the CFD be as flat as possible. Edited February 10, 2014 by jid2 Link to comment Share on other sites More sharing options...
blind bat Posted February 10, 2014 Share Posted February 10, 2014 Bravo! That comp looks incredible. I can't wait for the range report on how it runs. Link to comment Share on other sites More sharing options...
StraightUp_OG Posted February 10, 2014 Author Share Posted February 10, 2014 Sweet man! Post a video of the range trip. I followed the other thread so I am looking forward to the results! Link to comment Share on other sites More sharing options...
donnyglock Posted February 10, 2014 Share Posted February 10, 2014 I want one!!! Link to comment Share on other sites More sharing options...
nick romero Posted February 11, 2014 Share Posted February 11, 2014 awesome comp! good work definately looking forward to hearing the range report on it Link to comment Share on other sites More sharing options...
Akkid17 Posted February 11, 2014 Share Posted February 11, 2014 Any particular reason you put the blow off holes near the middle of the chamber? I was talking to a guy a little while ago that was adamant about the holes having to be at the end of the chamber to ensure all the gas possible hits the wall for the most effective use of the gas. Just curious Link to comment Share on other sites More sharing options...
jid2 Posted February 11, 2014 Share Posted February 11, 2014 (edited) Haha, where is his data, and efficient in which respect? I was looking to maximize downward force overall while still giving a little side stabilization. Bleeder at the front of the port created more sideways force, but was worse for downward - thus I went with what gave more downward force. Edited February 11, 2014 by jid2 Link to comment Share on other sites More sharing options...
Bob DuBois Posted February 11, 2014 Share Posted February 11, 2014 Enjoy reading your posts, you have a lot of talent that will only get better! Link to comment Share on other sites More sharing options...
Akkid17 Posted February 12, 2014 Share Posted February 12, 2014 Haha, where is his data, and efficient in which respect? I was looking to maximize downward force overall while still giving a little side stabilization. Bleeder at the front of the port created more sideways force, but was worse for downward - thus I went with what gave more downward force. No data just typical range talk people talking about what they know about gun stuff. Guy was wanting to make his own comp as well and was talking about the stuff he'd heard and what not Link to comment Share on other sites More sharing options...
StraightUp_OG Posted February 17, 2014 Author Share Posted February 17, 2014 So my attempt at burnt bronze. Starting to get the hang of the spray gun. Link to comment Share on other sites More sharing options...
ltdmstr Posted February 17, 2014 Share Posted February 17, 2014 Nice color. Looks good with the black. Link to comment Share on other sites More sharing options...
StraightUp_OG Posted February 17, 2014 Author Share Posted February 17, 2014 Thanks, it did turn out pretty good. It looks much better in natural light. I used an 80/20 mix of bronze to black so it is not quite as bright as just the bronze Link to comment Share on other sites More sharing options...
stage12m Posted February 24, 2014 Share Posted February 24, 2014 that bronze looks sexy! Link to comment Share on other sites More sharing options...
ajg308 Posted February 28, 2014 Share Posted February 28, 2014 Major milestone for me today. The PM45-CNC is alive! Probably making the first chips this weekend. Link to comment Share on other sites More sharing options...
StraightUp_OG Posted February 28, 2014 Author Share Posted February 28, 2014 Pics! Pics! Pics! Sweet! Link to comment Share on other sites More sharing options...
donnyglock Posted February 28, 2014 Share Posted February 28, 2014 (edited) I was wondering when the PM45 would be operational. Where are the pics???? Edited February 28, 2014 by donnyglock Link to comment Share on other sites More sharing options...
donnyglock Posted February 28, 2014 Share Posted February 28, 2014 This is what I was up to today. Link to comment Share on other sites More sharing options...
DRichardson Posted March 1, 2014 Share Posted March 1, 2014 Looks great. I really like the side and top serrations. One like that, tri topped with the same side serrations and top serrations with the same spacing as the side would look pretty cool too. Link to comment Share on other sites More sharing options...
jid2 Posted March 1, 2014 Share Posted March 1, 2014 Thats so much handle cranking! What's the final weight? Did that comp arrive today? Link to comment Share on other sites More sharing options...
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