Indeed, the diagram isn't very clear as I only wanted to illustrate sliding o-ring seals.

The O-rings only ever come out of their seal inside the chamber, not outside, so the air flow shouldn't be a problem.

I got myself a 10mm reamer bit. How come didn't I know about those before, they are awesome.

I definitely have to get myself a reamer bit. Do you mind telling me why/how a balanced valve is troublesome in real life ? Mind that in the design, it is under tension from a spring and rests against a rim that keeps it on one side rather than the other. I assumed it would operate like a spool valve.

Thank you both matti and wyz. I'll have some reading to do. The main issues I had were chopping of the o-rings, but as you suggested wyz filleting should fix the problem. Another issue was that drill bits just don't seem to make a seamless surface enough even when using a metal lathe at max speed. I...

Hi, it's been quite a while that I've come here. Most likely nobody remembers me, I'm in the process of patenting a compact paintball pistol design (If you have a TiPX or Tiberius, you know how bulky they are) Right now, I have a standard inline piston valve with a three way valve combo for the air ...

You are quite right about the unattainable RPM, for firearms it goes around 250,000 RPM

But then, what about only 1000 RPM ? wouldn't it be sufficient for slower projectiles ? This is to avoid the secondary effects of hop-ups that cause to BB to considerably slow down past a certain distance.

Just a quick question, a google search yielded nothing. Has anyone ever attempted to, in attempt to imitate rifling, had the entire barrel assembly rotate on itself while the airsoft bb to be propelled was constricted in place by a rubber sleeve inside the barrel ? Even simpler, only rotate a very s...

Now, now, don't let a few of the members convince you all others are the same.

Most comments on the post are moronic and uninformed replies, but all in all it only is an oversized community where some few decided to give a bad name to the whole.

Hehe, looks like 9gag enjoyed the design

http://9gag.com/gag/5970589

13000 upvotes

That's crazy, would be hilarious to see someone whip that out for a lecture at uni

Maybe that already happened a few times The look on people's faces is priceless. The staring ends up being quite annoying tough.

The PSU is already in there, it's a 300W one. What do you mean by SLA, Zeus ? The first box you can see in the picture with the bag open is where every single component of the computer rests. The gpu, cpu, psu and both drives. The other white panel is the screen and keyboard. mike the design is very...

I know I was very often, especially when my spudding budget collided with other needs (In this case, a decent computer for computer science classes). Spudding truly is a gateway to all engineering fields and the skills learnt from building launchers comes in handy very often. This computer Hybrid sa...

Could anyone identify those matching male/female connectors ? http://fpvlab.com/forums/attachment.php?attachmentid=5149&d=1323987981 http://fpvlab.com/forums/attachment.php?attachmentid=5150&d=1323988078 I need an extension to link both together, and couldn't find what was it's name. Thanks in advan...

Yes, but I am nowhere near possession of a cloud-sized fog making machine. Scrap everything I previously said. The best design for my purposes would be an automated 3RPS shell loader, as to per each shell would be a cylindrical rocket motor with no fins, and a rotating barrel to provide spin and sta...

Meh, yes, maybe, but ... I want to be all like "IMMA FIRING MAH LAZOR" and glow in the dark bb's will barely be visible. 3RPS/300FPS is a goal impossible to reach with the weight restrictions. So, ... I think it's rocket time. Barrel-accelerated rocket time. (I am well aware of the 30 degree rule fo...

There already are two turrets on the airplane
The live FPV cam in the cockpit and the HD camera on top of the wing section.