Mass of paint-distance

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  • eric
    Go Bucks
    • Aug 2002
    • 526
    #1

    Mass of paint-distance

    One of Manike's posts on PBN got me thinking about this.

    Now we all know that 300fps is 300fps and one gun isnt gonna shoot farther(barring spin which most guns dont do) but what about the mass of the paint.

    Do the masses of different types of paint vary that much? A heavier ball at 300 fps would have a lot more inertia then a lighter one, making it travel further.

    Has anyone tested masses and how they effect distance?


    Send your angel to www.theangelguy.com
    Theeeeerrre GREAT!
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    • bjjb99
      Registered User
      • Dec 2001
      • 318
      #2
      High-mass paint is less susceptible to forces that are not proportional to mass. In the case of paintballs, these are primarily axial and lateral drag forces caused by interatcions with the air through which the paintball travels.

      A high-massed paintball will travel somewhat farther than a low massed paintball when the two are fired at identical exit velocities and initial trajectories. Furthermore, a high-massed paintball is less likely to be deflected by lateral wind, vortex shedding effects, and the like. Shot-to-shot precision should increase.

      However, high-massed paint carries with it increased energy and momentum, and thus delivers more "punch" to the target upon impact. Safety issues could arise if paintball masses increase significantly. An extreme (and absurd) example would be getting hit in the mask by a paintball sized steel ball moving at paintball speeds... ouch.

      BJJB

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        • eric
          Go Bucks
          • Aug 2002
          • 526
          #3
          Yes but it would be hard for compaines to produce paint that would be so heavy its dangerous.

          Anybody done any testing on this idea?


          Send your angel to www.theangelguy.com
          Theeeeerrre GREAT!

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            • athomas
              Of course it works-its AGD
              • Jan 2002
              • 8039
              #4
              It also requires more energy per shot to shoot a ball with a higher mass. I would give up some efficiency and use heavier balls if they were safe and gave me better shot control.
              Except for the Automag in front, its usually the man behind the equipment that counts.

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                • AGD
                  The man from AGD

                  • Oct 2000
                  • 5916
                  #5
                  Paint is different according to what they fill it with. Before the ASTM regulations they were all over the place. I think it has calmed down now but I'm not positive.

                  AGD
                  sigpic

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                    • QUINCYMASSGUY
                      Registered User
                      • Dec 2002
                      • 914
                      #6
                      I've always been very curious to know what a much smaller, heavier paintball that had paint that, when mixed with air, expands more so you still get a good splat but a much smaller ball with about the same weight, way less wind drag and about the same efficiency.
                      Feedback: http://www.automags.org/forums/showt...hreadid=105565
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                        • athomas
                          Of course it works-its AGD
                          • Jan 2002
                          • 8039
                          #7
                          The only problem with expanding paint would be if any splattered into an eye or something. If it expanded when contained by soft tissue it could cause injury.
                          Except for the Automag in front, its usually the man behind the equipment that counts.

                            Comment

                            • Redkey
                              Registered User
                              • Jan 2002
                              • 176
                              #8
                              ASTM F1979-99

                              A less than interesting read when compared to other ASTM test procedures. It's also a pretty unprofessional ASTM when compared to those used by either the automotive or aerospace industries.

                              the only requirements on the fill are that it should have a pH between 4.5 and 7.5 and should be compatible with polycarbonate. Also, paintballs cannot contain environmentally hazardous materials as defined by some govt regulations.

                              Max weight is 3.5 grams. Diameter can be between 0.650 and 0.709 inches.

                              They also have a requirement that 10 of 10 balls fired at 280 fps +/- 20 fps must break on a plywood target 80 feet away. With the velocity of each shot being measured to within +/- 20 fps.

                              Most of the ASTM talks about testing polycarb after exposure to the paint... the goal here is to make sure it will not degrade lenses over time.

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