Cannons, the teaser

Discussion in 'Weapons & Pneumatics' started by GregMcFadden, Aug 28, 2018.

  1. daisycutter

    daisycutter Active Member

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    Cool, I would love to see it. Do share as it is always fun to see new ideas. If you want to keep it to yourself I understand as well
     
  2. GregMcFadden

    GregMcFadden Facilitator RCWC Staff

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    I will be putting files of some sort out eventually but not until I am certain they are fully baked
     
  3. bsgkid117

    bsgkid117 Vendor

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    How are you firing two guns off of one solenoid? I thought the classic issue was if the tweaks weren't perfectly identical, one BB would leave the breech and all remaining pressure would vent causing a no-fire on the second gun? Maybe I'm just short on coffee today, but I'm curious to see how you figured that out.
     
  4. GregMcFadden

    GregMcFadden Facilitator RCWC Staff

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    I solved that little problem a long time ago. it really comes down to tolerancing and keeping everything in the pair identical along with judicious use of gas in a slightly different way than normal fast gun cannons work.
     
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  5. GregMcFadden

    GregMcFadden Facilitator RCWC Staff

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    it is really really ugly but it will work as a tech demo until more parts come in. Specifically some short 1/4-20 setscrews... once it works, better tiedowns for the C turret will get rid of much of that above deck claptrap


    IMG_20180907_163743.jpg
     
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  6. NickMyers

    NickMyers Admin RCWC Staff

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    I am excited to have this shooting at my superstructure tomorrow
     
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  7. Maxspin

    Maxspin -->> C T D <<--

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    Two battle into the new printed cannon. I only put it in the bow side mount. I will be replacing the aft side mount for the next battle!!!
     
  8. Maxspin

    Maxspin -->> C T D <<--

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    Greg has talent. That thang was nasty!
     
  9. Maxspin

    Maxspin -->> C T D <<--

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    After last weekend’s battle, I was impressed enough with the printed cannons to put more of them on my boat. I had placed it in the least effective position, in the bow sidemount.

    I moved the proven very effective bow sidemount to the aft position, and will put the “new cannon in the bow position.

    It struck me how modular these are!!!

    No worrying about magazine clearance issues and mount position. No worry about cannon mounts. They just drop in!!! (Almost that easy)

    From this
    0623181453a.jpg

    To this
    0831181704.jpg

    Having a malfunctioning cannon? I can swap out the cannon 3 minutes pond side!!!
     
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  10. Lou

    Lou Plastic magic -->> C T D <<-- Admiral (Supporter)

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    Where is the magazine?
     
  11. NickMyers

    NickMyers Admin RCWC Staff

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    vaguely...
    upload_2018-9-13_9-54-45.png
     
  12. Maxspin

    Maxspin -->> C T D <<--

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    What Nick said. That's all there is to it 0913180536.jpg
     
  13. SteveT44

    SteveT44 Well-Known Member

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    Have these been pressure tested to destruction?
     
  14. GregMcFadden

    GregMcFadden Facilitator RCWC Staff

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    I have taken them to ~250psi but I can't go over that with equipment I have available (relief valve pressure on strike regulator). Practically speaking, proper internal fill layout ~70-80% prevents catastrpohic failures, as there is no ready unzip possibility in the plastic when done properly. It is also 3d printed so it will be heavily dependent upon properly setting up the printer.
     
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  15. SteveT44

    SteveT44 Well-Known Member

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    250psi works for me. Nice work on this project btw.
     
  16. GregMcFadden

    GregMcFadden Facilitator RCWC Staff

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    One other side note for big gun folk. the only practical difference to make these run 3/16" bearings is a change in barrel tubing, o-ring seat and O-ring out to a -107 from -106
     
  17. GregMcFadden

    GregMcFadden Facilitator RCWC Staff

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    upload_2018-9-14_23-2-5.png

    I am almost ready to put the required parts out there to print the 1 unit cannon. the down angled thread is on a spherical joint, so it can be repositioned within reason. The horizontal sections of tube could use a bit o geometry at the top to aid with printing, but I have not had issues printing them sofar, so I have not gotten around to fixing that. I will be providing the fluid space model, meaning you have to draw your turret around it and boolean subtract
     
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  18. GregMcFadden

    GregMcFadden Facilitator RCWC Staff

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    first round of testing on the twins worked great! need to put a few hundred more test rounds through it while tweaking more but so far so good. once this tests out, it means that I have twin half units, twin 1 units, and single 1 units built in a way that is easy to configure and work with.

    https://photos.app.goo.gl/XNAqHnJLFG6g4aFGA
     
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  19. Maxspin

    Maxspin -->> C T D <<--

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    :woot:
     
  20. Maxspin

    Maxspin -->> C T D <<--

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    What is this? I see an adjustable angle plug in cannon. Greg is a genius I tell you!!!
    self positioning.jpg