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| rna_duelers |
 Posted: 12/17/2007 5:16 AM Post subject: |
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Major General
Joined: 26 Sep 2005
Posts: 1641
3118.23 Spud Bux
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| I love it.Small pneumatics aren't a favorite of mine but I do like this a lot.With a little bit of money and time you could make some impressive guns no doubt.Hope to see more out of you yet!
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| Antonio |
| Posted: 12/17/2007 8:40 AM Post subject: |
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Captain of Industry
Joined: 13 Aug 2006
Posts: 495
24.52 Spud Bux
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| rna_duelers wrote: | | I love it.Small pneumatics aren't a favorite of mine but I do like this a lot.With a little bit of money and time you could make some impressive guns no doubt.Hope to see more out of you yet! |
Hey thnx man! Yeah small pneumatics can be really annoying due to all the fitting etc. But it is a good project which doesnt need lots of money nor tools. The materials costs around 12$, and simple tools like a dremel, a soldering burner'', and a drill machine with some drill bits. It will take some time for me to share my ideas over the automatic airguns. I am looking at the design of the tippman and the spyder and a new reversed (mirrored spyder) which uses the barrel as the bolt.
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| Strake |
| Posted: 12/18/2007 23:18 PM Post subject: |
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Specialist
Joined: 02 Dec 2007
Posts: 52
62.18 Spud Bux
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| absolutely love how this works i might give something like this a try for my next one but bigger scale.
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| fretmelter |
| Posted: 12/19/2007 6:37 AM Post subject: |
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Corporal
Joined: 09 Jul 2007
Posts: 66
163.37 Spud Bux
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i like how u took the whole spyder design and used it for small projectiles but i have some questions. How many shots do u get off of tht air suply and how much psi is in it. Also did u use a sear to firer your hammer or did u make something els. also i was thinking of using other paintball gun designs like the autococker not much different from spyder, besides its closed bolt. what did u make your hammer out?
thnx im attempting a similar project
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| Antonio |
| Posted: 12/21/2007 17:05 PM Post subject: |
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Captain of Industry
Joined: 13 Aug 2006
Posts: 495
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| Antonio |
| Posted: 12/21/2007 17:08 PM Post subject: |
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Captain of Industry
Joined: 13 Aug 2006
Posts: 495
24.52 Spud Bux
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| Strake wrote: | | absolutely love how this works i might give something like this a try for my next one but bigger scale. |
Yeah bigger scale could be great! Keep track of hammer mass and valve spring constant though. A too weak spring or a too heavy hammer may result in efficient working (too much air used up). A too strong spring or too light mass has the opposite effect ofcourse. As I dont use a regulator on my system I use a big air tank (1.5l coke bottle) instead to make the air pressure as constant as possible over mulitple shots.
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| Strake |
| Posted: 12/22/2007 4:50 AM Post subject: |
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Specialist
Joined: 02 Dec 2007
Posts: 52
62.18 Spud Bux
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| thanks mate. was this your own design?? how long did it take you to build this?
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| Antonio |
| Posted: 12/22/2007 15:43 PM Post subject: |
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Captain of Industry
Joined: 13 Aug 2006
Posts: 495
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| Strake wrote: | | thanks mate. was this your own design?? how long did it take you to build this? |
I have been working a long time on these airgun already. My first design was a waterbottle with a popcap that opens when u move it forward (the one from the drinking bottles), it was really powerfull but only had one shot. I started working on new designs and came up with the barrel bolt concept as seen on my other project. This stacked tube design is taken from the spyder type of paintball guns as I saw that they had optimum designs. Inorder to make it though I had to use past experience and knowledge from making valves and mechanisms used for airguns. I have know about this forum before, but never found anything like it. Eventhought the spyder paintball guns (stacked tube) are really famous''. The thing is, u can look at a paintballs design but it is always a challange to make something like it but then with the materials and tools that I have. So yeah to be honest it took me 5 years to get to this gun, ofcourse not working on it constantly, rather step by step. If you know how to make things like this and if you look at my pictures, it could take u up to a weekend. Some things have to be tried out, like the use/making of different valves. I think I have made a easily reproducibil valve now. So I use is on all my designs. I think that is the first step u should make: making a poppet valve. Things like magazines and fancy looks come later
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| Strake |
| Posted: 12/22/2007 21:40 PM Post subject: |
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Specialist
Joined: 02 Dec 2007
Posts: 52
62.18 Spud Bux
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ive got plenty of time now thanks to the holidays so im either going to try to build a valve like this or the one i drew up. i want everything to be hand made on this airgun im building. i most probably will try to make both and see which works the best and keep that.
once again good job
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| Antonio |
| Posted: 01/05/2008 15:38 PM Post subject: |
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Captain of Industry
Joined: 13 Aug 2006
Posts: 495
24.52 Spud Bux
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| Strake wrote: | ive got plenty of time now thanks to the holidays so im either going to try to build a valve like this or the one i drew up. i want everything to be hand made on this airgun im building. i most probably will try to make both and see which works the best and keep that.
once again good job |
Hey if you are making ur own valve check my new posting:
homemade valves
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| jon_89 |
| Posted: 01/16/2008 22:55 PM Post subject: |
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Lieutenant Colonel
Joined: 11 Apr 2007
Posts: 477
642.41 Spud Bux
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| are shots consistant or do they with each shot?
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| jackssmirkingrevenge |
| Posted: 01/16/2008 22:58 PM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 7050
11306.91 Spud Bux
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| Techincally, as you shoot, the pressure goes down (meaning less power) but the resistance on the valve is also less, meaning it opens for longer (more power) so there should be a reasonable level of consistency.
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| jon_89 |
| Posted: 01/16/2008 23:26 PM Post subject: |
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Lieutenant Colonel
Joined: 11 Apr 2007
Posts: 477
642.41 Spud Bux
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hey ant you know what would be really nice? maybe post a how to on this gun. 
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| Antonio |
| Posted: 01/17/2008 7:22 AM Post subject: |
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Captain of Industry
Joined: 13 Aug 2006
Posts: 495
24.52 Spud Bux
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| jackssmirkingrevenge wrote: | | Techincally, as you shoot, the pressure goes down (meaning less power) but the resistance on the valve is also less, meaning it opens for longer (more power) so there should be a reasonable level of consistency. |
Thats exactly correct. As thought I have done measurements of speed decrease over shots, and it does go down eventhough the dwell times go up. I guess bc the barrel has a certain length and a longer dwell time has no effect. I have this graph here of the stacked tube airgun (check attachment). I am not sure what bottle I used on this test though, 0.5L or 1.5L I also did this test before I had a compressor so I dont know the pressures I used.
| jon_89 wrote: | | hey ant you know what would be really nice? maybe post a how to on this gun. |
Hey yeah I know, but I am focusing on more simple guns posting whise as I think ppl should first get going on making a valve who are interesting in this project. This airgun looks good and is veeery efficient but its recocking system is slower then the other guns i made. I was ganna try to make this one auto just like spyder paintball guns. But this doesnt really work out due to leakage of the hammer. So yeah my advice is to look at my other projects and start of a bit easier. As I live in a othercountry as well I dont know what is available in other countries.
Btw if u are really into this airgun just look up on P.4 what materials I used (same ones for all projects) and then look at the pictures I posted how I put it togethor. Thnx for ur interest btw
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| st.croixsurfer |
| Posted: 02/28/2008 19:34 PM Post subject: |
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Specialist
Joined: 27 Sep 2007
Posts: 46
57.59 Spud Bux
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| At the moment im currently reproducing this on a larger scale think. [m1 garand]
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