YES, it is exactly like that, unless you shoot on a soup can, or something not very hard. The bb's that I use weigh 1 gram. The light weight of the 6 mm plastic bb's is the light weight, very light for my taste, although I also use those. When I go to shoot in the backyard of my house, I do it abou...

YES, it is exactly like that, unless you shoot on a soup can, or something not very hard. The bb's that I use weigh 1 gram. The light weight of the 6 mm plastic bb's is the light weight, very light for my taste, although I also use those. When I go to shoot in the backyard of my house, I do it abou...

It is logical what it says. A 1/4 "steel pellet weighs almost exactly 1 gram. The mass of the ammunition should influence its rotational speed as it exits the barrel intentionally or unintentionally. The heavier, the more resistance to rotating at high speed. Unfortunately, I only have steel bb's t...

I am hesitant to chime in, seems i have a dissenting opinion. Thank you hectmarr, language is not something I study, and your post even in translation is clear and concise. I guess I could not explain properly. As hectmarr stated any imperfection in the barrel will affect performance. Personally I ...

i' ve kind off got sick about this, only a lothar walther barrel will make me do some work on air rifles form now on, and how its no way to buy one ill just pause this . ive allready spent 200 euro with this idea , a proper pcp costs about 300 e...so.....if it is any one here who knows an airsoft ca...

To amend my previous statement. I looked into airsoft and how the magnus effect pertains to accuracy. Airsoft guns use a "hop-up" to impart back spin to the projectile. This gives it a desirable lift increasing range and accuracy. However if you try to impart rotational energy the way rifling does ...

i opened this topic looking for some answers about what to do ( that i have not done ) for accuracy.... specs : 6.01 500 mm barrel ( 450mm, 550,mm, 600 mm.........) 0.5 g quality bbs optisan scope( 2 tasco, 1 buschnell (?), 1 no name,1 old russian made ww2 one) stainless steel very well put together...

I just want to note that a proper weld joint is MUCH stronger than any threaded arrangement. Note only that but a proper weld is stronger than the base metal in most cases. The primary concern is most certainly HAZ and proper execution. The chamber on my air rifle is a section of 3/4 hydraulic pipe...

Your English is MUCH better than my Romanian, so no worries...you express yourself just fine. There is not much to be gained by examining the welded ends, far too many variables. Are you familiar with F=P*A ? The weld holding your end plug is holding approximately 1719lbs of force (781Kg) at 1000Ps...

I realize that there may be some issues obtaining "preferred" materials in some countries. Can you show and give details of "how" you plugged each end of the tube? Al i just welded the part i cut off from the fire extinguisher that the bronze head screw into ( hope i have express myself correctly )...

I realize that there may be some issues obtaining "preferred" materials in some countries. Can you show and give details of "how" you plugged each end of the tube? Al i just welded the part i cut of from the fire extinguisher that the bronze head screw into ( hope i have express myself correctly ) ...

Should really look at the rest of the construction though... 1234.jpg that black line inside looks to be the weld........ the walls are 1.2 mm but could be 1.5 not sure, my measurement tool is kind of inexact .... forgot to mention that the main valve system is a fire extinguisher bronze head.... i...

PracticallySane wrote: ↑

Sun Dec 27, 2020 4:37 pm

This should help

https://eicac.co.uk/Pipe-Bursting-Pressure-Calculator

With your given parameters it looks like a burst pressure of roughly 4438psi.

tks, it looks it is rated at 2393 psi .......as it is welded.....

Watch out with that. I'm thinking your tube might have a weld seam since it's just a structural steel tube, right? Only seamless tubes should be used with high pressure and only then might the calculations provide some value. You often can't see the seam unless you look closely, and even then you m...

hy there, i cant figured out how to calculate the burst pressure of my airtank as i got a hillpump capable of 300 bar. i used to charge it to a maximum of 60-70 bar with a fridge compressor. so far i stopped to 100 bar.... airtank is a regular stainless steel pipe used in constructions( the one you ...