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hectmarr
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Tue Aug 25, 2020 11:48 am

Testing a small hybrid with a 3/16 ", 4.76 mm steel bb, I have the problem of having absolutely no precision when firing the weapon. :oops: It works at 9X and the firing barrel is perfectly straight and polished, just like in all my other weapons made the same way. I have not measured the speed but weighing 0.4 grams, it must be very fast. I cannot hit a soup can at more than 3 meters ... and I cannot calibrate the scope open, because the deviation is random, sometimes up, sometimes down or either side ... The barrel is 280 mm long.. Any idea why? :?
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jrrdw
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Wed Aug 26, 2020 4:00 am

Since you make all the same way, try a barrel from a consistent shooter that you have, so on so forth the process of elimination...
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hectmarr
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Wed Aug 26, 2020 8:42 am

jrrdw wrote:
Wed Aug 26, 2020 4:00 am
Since you make all the same way, try a barrel from a consistent shooter that you have, so on so forth the process of elimination...
I'm going to change the barrel. For some reason, I suspect that the bb`s acquires an energetic rotation movement and that produces the deviation, due to the magnus effect, it is only a suspicion. Thanks for your reply.
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farcticox1
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Fri Sep 04, 2020 2:52 pm

I found the same with steel bbs, different barrels made no difference.
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hectmarr
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Thu May 06, 2021 4:49 pm

A safety valve for pneumatic installation that says 1.8K, how many bar or psi is it? It is a rupture disc of a pressure regulator and I do not understand when it is 1.8K ...
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farcticox1
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Thu May 06, 2021 5:05 pm

hectmarr wrote:
Thu May 06, 2021 4:49 pm
A safety valve for pneumatic installation that says 1.8K, how many bar or psi is it? It is a rupture disc of a pressure regulator and I do not understand when it is 1.8K ...
kilopascal ? Kpa. 1 Kpa = 0.01 Bar, 0.145 Psi. But 1.8K would be so low :shock:
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hectmarr
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Thu May 06, 2021 5:40 pm

I already understand it. "K" is for multiplying by 1,000.
In this specific case, 1.8K means 1.8 psi x 1000, it is 1800 psi, about 124 bar. Thanks for your answer.
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jackssmirkingrevenge
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Fri May 07, 2021 10:04 am

hectmarr wrote:
Thu May 06, 2021 5:40 pm
In this specific case, 1.8K means 1.8 psi x 1000, it is 1800 psi, about 124 bar. Thanks for your answer.
I confirm that is the case, a 1800 psi burst disk is typically one you will find on the exit side of a 850 psi regulator on a paintball bottle. A 3000 psi bottle will typically have a 5K disk, and a CO2 bottle will have a 3K disk.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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