Spurt Cannons

Discussion in 'Weapons & Pneumatics' started by Chris Easterbrook, Sep 19, 2008.

  1. Chris Easterbrook

    Chris Easterbrook Well-Known Member

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    Is there anywhere you can buy spurt cannons as Battlers does not have them in their cataloge anymore?
     
  2. TheMackster

    TheMackster Member

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    Can't you just file down the pin on a regular piston cannon to allow 2-3 BBs at a time to get thru before it fires?

    Or, failing that, for a "fire everything in one shot" spurtgun can't you just remove the selector valve entirely and feed the air and all BBs directly to the gun?

    Mack
     
  3. GregMcFadden

    GregMcFadden Facilitator RCWC Staff

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    You can remove the piston to spurt all of them. These can be made very easily using home depot or lowes parts (if they exist up near you)

    Sometimes you can shorten the piston to get multiple rounds per shot but I have never had good consistency trying that.

    -Greg
     
  4. TheMackster

    TheMackster Member

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    Hhmm, on that note Chris. I'm picking up my drill press next week specifically to experiment with making cannon so I'll see if I can rig some spurt guns while I'm at it. I wanted some for my cruiser anyway. :)

    Mack
     
  5. GregMcFadden

    GregMcFadden Facilitator RCWC Staff

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    For spurt only, you can skip the selector mechanism entirely, just build the breech with the magazine atached directly to it. you may be able to get better performance by puttiong 1/8" line to the cap rather than the 1/16ID
     
  6. Chris Easterbrook

    Chris Easterbrook Well-Known Member

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    Hey Greg how is the new canister mag coming?
     
  7. GregMcFadden

    GregMcFadden Facilitator RCWC Staff

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    Working well. Justin has been playing with them and some have made it down across the pond to the Aussies. Currently I am designing a tripple variant. the twins are 2" Diameter , the tripples will be 2.5"
     
  8. Chris Easterbrook

    Chris Easterbrook Well-Known Member

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    Ae you planning to sell them once you get them perfected.
     
  9. GregMcFadden

    GregMcFadden Facilitator RCWC Staff

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    Yeah. They are basically there now, I just want to get justin his set and have him play with them a bit. I have not changed the design in quite a while.
     
  10. Bob Pottle

    Bob Pottle Well-Known Member

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    Mackster,
    I've been building spurt guns for several years. I've got a few designs, some of which fire 3 BBs or 5 BBs per shot, and others the full magazine load. One design is a light weight model for use in destroyers or CLs. They'd been displayed locally at the Maritime Museum of the Atlantic model boat show (Halifax, NS).

    Chris E.,
    The one installed in Joy Rodgers Mogador (NABS) was built by me.

    I can build them for NABS or NATCF members (or show members how to do it) but don't export any.

    Bob
     
  11. Chris Easterbrook

    Chris Easterbrook Well-Known Member

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    We have found out that any Battlers connon can be converted to a spurt cannon with ease. I think that is what I will be doing. The converson should only take about 30 mins or so. I am planning to covrt one soon and will let everybody know the results.
     
  12. Jay Jennings

    Jay Jennings Well-Known Member

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    Bob,

    I am still very interrested in learning how to make guns. Maybe we will be able get together this year and have a teaching/learning session. We didn't have too much luck with it last year and could probably get a few people into it.
    Please let me know if and/or when we can schedule something,
    J
     
  13. Bob Pottle

    Bob Pottle Well-Known Member

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    Jay,
    I'll be busy getting Steve's HMCS Ontario battle-ready and helping Ian rearm HMS Hood for the next 2-3 weeks. The first weekend of November should be open for a cannon building session. Maybe we can get together at Steve's workshop - my workspace is too cramped.

    On Sunday Steve and I talked about the I-400 hull mold. The three of us need to discuss that project.

    Bob
     
  14. Jay Jennings

    Jay Jennings Well-Known Member

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    Sounds like a plan, count me in. Can you post the list of items we will need again please, I have no idea where the previous list went, there seems to be a small black hole in my basement, things somehow go missing and I don't ubderstand why. Would it be ok if Mack came along as well? I know he wants to learn to make guns.
    J
     
  15. Bob Pottle

    Bob Pottle Well-Known Member

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    Jay,
    I posted the list of parts and material for BB cannons on the NABS site in late April or early May. Perhaps the Moderator for the NABS site can recover the list from the archives. If not I'll make up another one.

    Bob
     
  16. BoomerBoy17

    BoomerBoy17 Active Member

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    how much do you charge for spurt cannons Bob?
     
  17. Jay Jennings

    Jay Jennings Well-Known Member

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    I will check and see if I can find it and then let you know.
    J
     
  18. BoomerBoy17

    BoomerBoy17 Active Member

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    Thanks, they seem like a cool feature for cruisers. Especially a 1 unit spurt gun that fires 3 at a time or so.
     
  19. Bob Pottle

    Bob Pottle Well-Known Member

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    Boomerboy,
    I only sell BB cannons to members of the clubs I belong to in Halifax. I don't export due to potential customs and liability issues in the U.S.

    Spurt guns that fire all BBs in the mag at once are easy to build. Use an L fitting instead of a T fitting to connect the magazine to the upfeed tube. Solder a 1/16" brass tube at the loading end of the magazine only. There's no need for another CO2 feed port because there's no interrupter (clevis pin) to be lifted.

    The spurt guns that fire 3 or 5 BBs per shot are more complex. They require an interrupter pin that's tapered almost to a point and has a 1/16" CO2 port drilled vertically through it. Barrel, breech and magazine are in line with a T fitting between mag and breech, and the interrupter pin sitting in the center, downward arm of the T.

    The horizontal configuration allows this light weight spurt gun to be mounted inside a DD's superstructure or in a casemate main armament mount (as in Russian CL Krasni Krim/Profintern). It takes up very little space.

    The length of the breech behind the O-rings is made to hold the number of BBs to be fired with each shot, so that the last BB is halfway over the tapered interrupter pin. Say the gun is to fire 5 BBs per shot. BBs 5 and 6 are each halfway over the center arm of the T fitting.

    When the CO2 enters the bottom of the T the tapered interrupter drives up between BBs 5 and 6, CO2 enters the mag via the port drilled through the interrupter and BBs 1-5 are fired. The interrupter drops back into the bottom arm of the T and BBs 6-10 roll forward into the breech. (The magazine is slightly sloped so the BBs will roll into the breech.)

    A one unit spurt gun can be built to fire 5 salvos of 3 BBs each or 3 of 5 BBs each, and a 0.5 unit spurt gun can fire 2 salvos of 5 BBs, or 3 of 3 BBs and a final single shot.

    These cannons are easy to make but require careful measurement to make sure the interrupter pin will drive up exactly between two BBs in the magazine/breech.

    Bob
     
  20. BoomerBoy17

    BoomerBoy17 Active Member

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    Thats why i would buy one instead of making my own.