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Single shot airsoft

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
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Re: Single shot airsoft

Unread postAuthor: farcticox1 » Fri Jan 19, 2018 5:33 am

Jack hints at 850psi :idea:

Have you tried this app https://play.google.com/store/apps/deta ... full&hl=en
there is is a free version somewhere, I do have it saved somewhere I think.

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Re: Single shot airsoft

Unread postAuthor: hectmarr » Fri Jan 19, 2018 5:50 am

farcticox1 wrote:Jack hints at 850psi :idea:

Have you tried this app https://play.google.com/store/apps/deta ... full&hl=en
there is is a free version somewhere, I do have it saved somewhere I think.


850 psi is enough pressure. Thanks for the information.
I'll take a look at this application, but I think I'm going to build a homemade chronograph, I have to get a diagram. Thank you, farcticox1 :)
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Re: Single shot airsoft

Unread postAuthor: jackssmirkingrevenge » Wed Jan 24, 2018 7:40 am

hectmarr wrote:The problem is that I do not have a chronograph. In my country, they are very expensive.


Is importing such items a problem, do you have high customs tariffs?
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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Re: Single shot airsoft

Unread postAuthor: hectmarr » Wed Jan 24, 2018 8:34 am

jackssmirkingrevenge wrote:
hectmarr wrote:The problem is that I do not have a chronograph. In my country, they are very expensive.


Is importing such items a problem, do you have high customs tariffs?

Yes, they are of the order of 50% of the value of the product. The problem is that I already spent the money for hobby ... I bought a turbojet for model airplanes. For now I should not spend more. :( I'm looking at the possibility of making one, well done, but I still lack information and understand everything.
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Re: Single shot airsoft

Unread postAuthor: jackssmirkingrevenge » Fri Jan 26, 2018 9:27 am

That's a shame, we could have sorted something out.

Jimmy had plans for a relatively easy and cheap one here: http://www.inpharmix.com/jps/Jims_chrono.html
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Re: Single shot airsoft

Unread postAuthor: hectmarr » Fri Jan 26, 2018 10:24 am

jackssmirkingrevenge wrote:That's a shame, we could have sorted something out.

Jimmy had plans for a relatively easy and cheap one here: http://www.inpharmix.com/jps/Jims_chrono.html

Thanks Jack for the link.
Actually I am inclined to build one with photodiodes that are very low price. The part of the calculation wounded him with the computer and one of the various software that I have to compose music. These "read" electrical signals are from a microphone or whatever. This is the design that I like, on youtube. It should be enough to determine the speed of the experiments.
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Re: Single shot airsoft

Unread postAuthor: farcticox1 » Wed Jul 04, 2018 6:17 pm

Stainless steel chamber upgrade work, the original PVC front part of the chamber is plugged off, will be doing a chrono test soon as well.
SS (1).jpg

SS (2).jpg

SS (3).jpg
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Re: Single shot airsoft

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Re: Single shot airsoft

Unread postAuthor: hectmarr » Fri Jul 06, 2018 8:14 pm

Your work is very nice.
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Re: Single shot airsoft

Unread postAuthor: farcticox1 » Sat Jul 07, 2018 6:20 am

Did you build your chrono ? Looks like you were going to make one the same as I did (Jimmys), I used 2 pairs of 5mm photo emitter/receiver diodes (Ebay) spaced at 6" (0.5ft), powered by 1.5Vcell in the junction box. It works well and is consistent. I am using Audacity to capture the trace, it is tricky to read the spacings though, might try and look for another program with higher resolution.

chrono (2).jpg

chrono (1).jpg
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Re: Single shot airsoft

Unread postAuthor: hectmarr » Sat Jul 07, 2018 9:55 am

I did not build any of this. Maybe in the future I will do it.
Any DAW, digital audio workstation, can serve you, Nuendo, cubase, fl studio, Studio One, Ableton Live, Reason, Pro Tools etc, but they are all similar, and somewhat cumbersome to get this information. Question of trying and choosing.
Maybe one of these might interest you ...
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Re: Single shot airsoft

Unread postAuthor: farcticox1 » Sat Jul 07, 2018 7:57 pm

Looks like Audacity is as good as any, I think if I cut and paste the selected pulses and use maximum zoom it is easier to read, should get to test a couple of air soft tomorrow hopefully.
This is sort of what I get
scale.png
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Re: Single shot airsoft

Unread postAuthor: farcticox1 » Sun Jul 08, 2018 8:44 am

Did the chrono test with 0.2g,

150psi = 694fps
160psi = 706fps

So looks like around 700fps with the pressure I can safely give it, that seems pretty good :D

Got to try the 0.12g now :idea:
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Re: Single shot airsoft

Unread postAuthor: hectmarr » Sun Jul 08, 2018 12:15 pm

Interesting test and chronograph :)
I would build a similar one to yours, I would have to position it at no less than 20 "from the muzzle of the shotgun, because I see a flame, white fire, when I shoot in the dark and could damage the instrument.
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Re: Single shot airsoft

Unread postAuthor: jackssmirkingrevenge » Thu Jul 12, 2018 5:28 am

farcticox1 wrote:Got to try the 0.12g now :idea:


You won't see supersonic speeds but it will be pretty fast ;)

My supersonic 6mm was pushing 0.25g BBs beyond 1000 feet per second.

Isn't it high time you bought yourself one of these little beauties and moved to the the next level?

Once you go high pressure, you never go back...
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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Re: Single shot airsoft

Unread postAuthor: hectmarr » Thu Jul 12, 2018 9:59 am

jackssmirkingrevenge wrote:
farcticox1 wrote:Got to try the 0.12g now :idea:


You won't see supersonic speeds but it will be pretty fast ;)

My supersonic 6mm was pushing 0.25g BBs beyond 1000 feet per second.

Isn't it high time you bought yourself one of these little beauties and moved to the the next level?

Once you go high pressure, you never go back...

I will definitely apply this advice to me :D
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