"Death from above": Electo-Mortar

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  • WetPaint
    Registered User
    • Apr 2004
    • 25

    #1

    "Death from above": Electo-Mortar

    I play a field sometimes called "mounds" which is a set of earth berms with a bit of grass on top. It often turns into trench warfare, with one or both teams camped out behind the furthers mounds (About 100 ft apart).
    One tactic I've considered is to loft balls into the air so they fall from above on top of the opponents. Unfortunately, if you've ever tried to spray water from a hose in a high arc, you know it's very difficult to get it to land in a given spot. You have to make very small angle corrections and wait for the results.

    With an assistant, you could make an adjustable stand and test fire it on the field until the shots land at the correct range, but then it would work only for that distance.

    So, one thought led to another, leading to this high tech approach: The Electro Mortar (EM):

    Start with any marker, perferrably one with very consistent velocity, and ideally, an electro-trigger and a force feeder such as the Halo or warp.

    Add to this the EM box, which fits over the end of the barrel. Inside the EM box is:

    1. Microprocessor
    2. Photo-optic chronograph
    3. Angle measurement device (solid state accelerometer)
    4. LCD display.
    5. Fire signal LED, or auto-fire output.
    7. Thumbwheel range adjuster.

    To use it, you first pop up and aim the rangefinder at your opponent's bunker and press the button to lock in the distance. The LCD confirms the distance measured.
    The processor knows the velocity of the paintballs and the distance by direct measurement, and the ballistic characteristics of paintballs in ROM. With this data, it can calculate the elevation angle required to rain paint from above at the measured distance.

    You then brace the tank against the ground and adjust the angle until the light comes on, and begin firing.
    In the deluxe model, you plug a cable into a jack on your electo marker that's wired in parallel with the trigger switch. While holding two fingers on safetry switches, you simply adjust the angle until it begins firing at a preset rate. The thumbwheel is used to fine tune the range if you have a spotter on the sidelines to call out the actual impact point.
    I suppose it would work in speedball games, as long as your opponents stayed put long enough.

    And, No, I have absoutely no intention of producing such a thing. Still, I wonder if it would work.
  • trains are bad
    Registered User
    • Oct 2003
    • 1751

    #2
    It would. Anything can be done, given time, money and determination. The question is, is it worth it?
    TRB's feedback

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    • Rokudon
      play Maple Story, its fun!
      • Sep 2004
      • 163

      #3
      one problem i can find in this, WIND. think, even in old day wars the main problem with artillery shelling was wind (not to mention air temp, but thats more centered around the sniper). add some sort of wind measuring device (along with direction), stuff a palm PC in there instead.. and make some software to run it. anyway, just my point ( and i knwo you're not making it, just the way i type)

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      • bjjb99
        Registered User
        • Dec 2001
        • 318

        #4
        Terminal Velocity and Breakage Likelihood?

        Paintballs raining from the sky are going to be moving right around a paintball's terminal velocity of approximately 67 feet per second. I can see a paintball moving at this speed breaking if it hits a guy's head, mask, or gun, but breaking upon impact with any other part of his body is going to be fairly unlikely.

        As a test, have someone lay on the ground and drop paintballs on them from about 60-70 feet in the air. That's about how far a paintball will have to fall to reach its terminal velocity. The roof of an office building with cooperative owners might suffice.

        BJJB

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        • Predator-KMK
          Registered User
          • Jul 2004
          • 16

          #5

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          • frop
            Easily Irritated
            • Feb 2004
            • 751

            #6
            how about making an actual mortar, not just a lobbing calculator? you know, firing tube, drop shells in, etc. but instead of firing a single shell, set something up like shotgun shells, where it'd be filled with a bunch of paintballs.
            Origninally posted by warbeak2099
            Definately extra lube. I keep two bottles at all times. Can't leave home w/o your lubricant.



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            • Predator-KMK
              Registered User
              • Jul 2004
              • 16

              #7
              Originally posted by bjjb99
              Paintballs raining from the sky are going to be moving right around a paintball's terminal velocity of approximately 67 feet per second. I can see a paintball moving at this speed breaking if it hits a guy's head, mask, or gun, but breaking upon impact with any other part of his body is going to be fairly unlikely.

              As a test, have someone lay on the ground and drop paintballs on them from about 60-70 feet in the air. That's about how far a paintball will have to fall to reach its terminal velocity. The roof of an office building with cooperative owners might suffice.

              BJJB

              As far as I know a projectile thrown parabolically has the same velocity in the beginnig and in the en of its trajectory

              http://www.physicsclassroom.com/mmedia/vectors/bds.html (read all)

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              • bjjb99
                Registered User
                • Dec 2001
                • 318

                #8
                Originally posted by Predator-KMK
                As far as I know a projectile thrown parabolically has the same velocity in the beginnig and in the en of its trajectory

                http://www.physicsclassroom.com/mmedia/vectors/bds.html (read all)
                ... then you must be living in a vaccuum, literally.

                My apologies... just a bit of physics humor.

                The website you listed gives a treatment of projectile motion in the absence of air resistance. As soon as you include effects of the air on the projectile, the concepts presented in the website you mention often no longer apply.

                BJJB

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                • Rokudon
                  play Maple Story, its fun!
                  • Sep 2004
                  • 163

                  #9

                  i'm sorry, but that's funny... similar to this design (with the exception of the caliber being shifted one decimal point...). my point? you need custom ammunition to run it. as they say, there would not be enough velocity to do it. if there is, you would need to rain it to get a targetting point.

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                  • WetPaint
                    Registered User
                    • Apr 2004
                    • 25

                    #10
                    Originally posted by bjjb99
                    Paintballs raining from the sky are going to be moving right around a paintball's terminal velocity of approximately 67 feet per second. I can see a paintball moving at this speed breaking if it hits a guy's head, mask, or gun, but breaking upon impact with any other part of his body is going to be fairly unlikely.

                    As a test, have someone lay on the ground and drop paintballs on them from about 60-70 feet in the air. That's about how far a paintball will have to fall to reach its terminal velocity. The roof of an office building with cooperative owners might suffice.

                    BJJB
                    I experimented by shooting PB's straight up over my home deck (large lot) the one that hit the deck splattered nicely. Head, visor, mask, shoulders, pods, all should make nice, hard targets. I still see left/right aiming as a problem though, unless a sight could be rigged.

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                    • TheTramp
                      Registered User
                      • Jan 2001
                      • 4019

                      #11
                      Originally posted by frop
                      how about making an actual mortar, not just a lobbing calculator? you know, firing tube, drop shells in, etc. but instead of firing a single shell, set something up like shotgun shells, where it'd be filled with a bunch of paintballs.

                      You hit the nail on the head.

                      Just use an air cannon to launch 30-50 old paintballs. They'll spread out and cover a fairly large area. As there'll be a lot of paint comming down, the chance of hitting a hard part (gun, mask, pack, etc) of the other guys is pretty good.

                      It's not perfect but can have good results and will be fun no matter what.
                      "Relax. Don't worry. Have a Home Brew."
                      -Charlie Papazian

                      Feedback: http://www.automags.org/forums/showt...threadid=40134

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                      • Rokudon
                        play Maple Story, its fun!
                        • Sep 2004
                        • 163

                        #12
                        tramp's got a point. shotgun mortar. or stuff a paint grenade in one... altho it might be a bit messy

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                        • frop
                          Easily Irritated
                          • Feb 2004
                          • 751

                          #13
                          Originally posted by Rokudon
                          tramp's got a point. shotgun mortar. or stuff a paint grenade in one... altho it might be a bit messy
                          If you're concerned about seting off an armed grenade, just basically make a larger scale LvlX setup to more progressively accelerate it. I thought about shootin grens too, but I also thought getting hit by one shot from a mortar would be EXTREMELY painful, not to mention probably physically dangerous
                          Origninally posted by warbeak2099
                          Definately extra lube. I keep two bottles at all times. Can't leave home w/o your lubricant.



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                          • undescriptive
                            Battered and Bruised
                            • Apr 2004
                            • 279

                            #14
                            I was going to modify one of my old pumps I have lying about into a "grenade" launcher...

                            The basic Idea was to have a shell made of cardboard with s ides that split apart when it leaves the barrel making it safe as you don't have "solid" parts flying at you.

                            The payload would be a water balloon filled with paint solution

                            the rounds would have to be made before hand, but are likely to be quite good fun on the field :) especially if you chop a pump to be an underslung grenade launcher

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                            • TheTramp
                              Registered User
                              • Jan 2001
                              • 4019

                              #15
                              Originally posted by frop
                              I also thought getting hit by one shot from a mortar would be EXTREMELY painful, not to mention probably physically dangerous

                              I totaly agree. That's why I only go for the morter effect with paint balls as apposed to the shotgun effect.
                              "Relax. Don't worry. Have a Home Brew."
                              -Charlie Papazian

                              Feedback: http://www.automags.org/forums/showt...threadid=40134

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