Azrael0987

Pump action Helios using sink drain thin plumbing. I used a second drain tube to cut the threaded end off for the slide since it nests the smaller end. I also used some of the rest of the second tube to fill the empty shell of a bigshock for the vertical grip. 7/16 poplar dowel ziptied between the stock priming rod and the pump grip.

So far it works like a charm and almost returns itself already. Some chapstick in the pump slide maybe or a small extension spring added externally if the internal one can't be upgraded would solve that.

I have yet to open it and put a [k26] in it since it's really pretty good stock plus I bought it to use with my little brother and nephews.

I was impressed with how well the sizing of the pipe matched the muzzle of the Helios as it was really my only option on materials at the moment. It was asking to be made at 3 am with the scraps in my friends garage.  IMG_20180331_230527.jpg   159.75KB   81 downloads  IMG_20180331_231552.jpg   160.83KB   83 downloads  IMG_20180331_231121.jpg   160.04KB   83 downloads  IMG_20180331_231520.jpg   156.58KB   85 downloads  IMG_20180331_231306.jpg   210.94KB   82 downloads

I have a singled titan I can do some testing with but theyre not as good imhp. I was really hoping to have something new here but I think rifling ala scar would still do a lot. Possibly enough to not need the hopup tab. Im hoping the blaster Ive devised will make a good all around of decent performance for rival, as clean and ergonomic as pvc can be, and not have nightmarish pump/load times. Im thinking of using the 1" pump and 1 1/4" pump tube from my original design to decrease the number of pumps it takes to fill the tank. Id assume the roughly 2:1 volume difference would equate to half as many pumps. I really have no idea how many a 1:1 setup would take until I make one but the fewer the better

I didnt know how it didnt pop balls either but it was really freaking cool. I thought hopup was a tab of sorts at the end of the barrel. It interfered with the balls exit and made it spin towards whatever side of the barrel the tab is on. The flatline was a truly bent barrel that managed the same effect. A friend from highschool had one and it was wicked. In my opinion it made a smoother backspin than the abrupt hopup tab and made more of a floating shot that kept going like a laser until it lost spin. Basically it was a 100ft laser not a 100ft arch shaped shot.

The flatline barrel rolls the ball along the upper edge of the barrel down the curve causing it to roll backwards. Once it exits the barrel it spins and has a magnus effect flight pattern lifting the ball back up and flying further. I just dont know how theyll perform due to lower mass. Either not really take any advantage of the system or magnus too much to the point that theyre flying more sideways than forward.

Do yourself a favor and start learning how to design with CAD. Programs like Fusion 360 are free and are immensely capable. It's like an unlimited sandbox where you can build and troubleshoot digitally in hours what would usually take weeks of trial and error in the real world.

Also, I don't know if Fusion 360 has this, but in the program I use (SolidWorks) There's a very detailed simulation system that would allow you to input the material you are using along with your planned pressure, and it will be able to tell you if the system is safe of not. 

Also: I'm not sure if you're using PVC for the air tank, or how high the pressure is, but I would be sure to cover everything that is pressurized with Kevlar reinforced tape so that in the unlikely event that is does explode, you won't get shrapnel in your face.

Ive used autocad before for a class but didn't get to use it much outside of that. I need a computer though to take any good use it of that. I had planned on wrapping the exposed pvc with gorilla tape until it was smooth with the fittings. Probably using thick walled grey conduit for the pressure chamber as well.