pneumag question

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  • robnix
    email robnix@gmail
    • Jan 2006
    • 2094
    #1

    pneumag question

    So I'm putting together my latest project, which is going well until I try to walk the trigger. About every 4-5 shots, nothing really happens. except I hear a little bit of gas escape and I see the ram hit the sear. The valve doesn't fire though.

    Minimag vavle
    RT Pro On/Off
    Mpa-3
    MSV-2
    Tags: None
    • Dark Side
      RPG Fan Club President
      • Sep 2005
      • 1212
      #2
      Do you have enough imput pressure rom the LPR? Mine did the same thing.

        Comment

        • G Squat
          Registered User
          • Jul 2006
          • 240
          #3
          my guess would be that your'e outshooting your valve. Classic/mini valves only have about a 13 cpm recharge rate so if you try to start walking it, after a few shots there will no longer be enough pressure to fire another ball until you let it recharge for a slpit second.
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            Comment

            • Smoothice
              Registered User

              • Nov 2006
              • 4579
              #4
              Originally posted by G Squat
              my guess would be that your'e outshooting your valve. Classic/mini valves only have about a 13 cpm recharge rate so if you try to start walking it, after a few shots there will no longer be enough pressure to fire another ball until you let it recharge for a slpit second.

              There have been classic valves clocked at 18-20 bps.

              I don't think he is outshooting the valve. It could be that he is starving the valve of air because he is outshooting the on/off. There is a post by the electrician somewhere around here that tells you how to modify your rt on/off to give it more air flow. If you can handle doing a pneumag conversion you can certainly handle this mod.

              Good luck.

                Comment

                • robnix
                  email robnix@gmail
                  • Jan 2006
                  • 2094
                  #5
                  thanks for the input everyone. I'll be able to do some more testing this weekend.

                    Comment

                    • Spider-TW
                      U R techno-literate!

                      • Oct 2006
                      • 3554
                      #6
                      Originally posted by smoothice
                      There have been classic valves clocked at 18-20 bps.
                      20 bps Classic

                      The trick is that to get any marker to shoot fast it has to have some recharge time. Electro frames guarantee that, your fingers don't. Walking an electro will not train your fingers to keep a regular interval at all, so some of your problem may go away with a little practice.

                      The other thing that happens is that the MPA-3 doesn't hit the sear the same way as a normal trigger. Without a sear stop, the on/off pin gets shoved all the way up. This is probably not the way the valve was operating before, and in a non-RT valve the pin doesn't get kicked back out as easily. That can hang you for millisecond too.

                      The Electrician has a post on sears stops too. When you search for those posts, look in all of Automags.org, because I think some are in "The Workshop" forum.

                      The main question though: When the MPA-3 hits the sear and the valve doesn't fire, is the sear moving?

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