Do *not* use those threaded rods. What is the inside thread diameter of 10-24? Something like 0.15? If your ultimate strength is 70kpsi then you're only looking at 2400 pounds before they(both) snap, and at 600 psi you're looking at 4200 pounds of tensile strain. Solid 1/4 inch rods should fail at ...

Thanks for the replies. I think 2 by #10 threaded rod might be your weak link and the mode of failure, um, hazardous Yes, I was thinking the same thing. Do you think two 1/4" high-strength 1144 carbon steel rods would do? The yield strength 125,000 PSI. I could just thread the ends. Do you have to s...

Hey guys. I'm a bit confused on how much pressure I can safely use with the chamber I've made. I've seen some members here use the calculator at this link: http://www.engineersedge.com/pipe_bust_calc.htm . With that calculator I get a working pressure of 1300 PSI with a safety factor of 5. Not that ...

RAP4 AG1 Gen2 Air Regulator http://www.ebay.com/itm/130501470585

Got it. I see what needs to be done now. Thanks again! And a big thanks to PCGuy for this great forum!

Thanks Ragnarok. I was thinking of a design kinda like this:

Hey Guys! Does anyone know an equation to determine the spring rate for a regulator spring? It would be for an inline regulator along the lines of Ragnarok's design, pictured at end of post. From reading old posts on SpudFiles, I have a general idea of how to do it (I think). Would the equation be s...

Yep, that's true. Thanks for the help. I really appreciate it.

I think I know what you're talking about now. The screw head secures from side to side, that's why we needed to know the shear strength of the screw. Now I really feel dense. Zoro Tools has a hundred priced at $10.63. A $40.00 difference. The description looks almost identical to the ones at Grainge...

Thanks for all the useful info, Gippeto, especially how to calculate force, bearing area and shear failure. There is still one thing I'm a bit hazy on. You say you can slightly recess the screws in the plug but don't you screw through the tubing first then into the plug? So the head of the screw wil...

Smallish point...welding will destroy the heat treat (T6) and alter the pressure handling capability significantly. Would suggest an oring sealed plug with good grade socket head cap screw in shear...preferably with the head of the screw bearing on the tube wall...this increases the bearing area an...

LOL. Sorry about that Gun Freak. I wasn't thinking about the abbreviation for girl friend. I don't think you're my type anyway.

Thanks GF and JSR. I was thinking 300 PSI would be good too.

Hey guys, The aluminum tubing is 6061-T6 Drawn (not Extruded), 2 inch OD, .065 Wall, ASTM B210. It's rated at Max 610 PSI @ 72 degrees F on McMasters web site. Link: http://www.mcmaster.com/#standard-metal-tubing/=o8ypk2 Considering the launchers that are made with this will be sold to the public, w...

Walter103 wrote:Also I have tried to download HGDT but failed to get it to run. It kept saying missing file. Thanks for all the input!

Walter

Try using "Run as administrator".