My Little Mortar

Discussion in 'Cannon' started by rcbif, Oct 9, 2007.

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  1. Oct 9, 2007 #1

    rcbif

    rcbif

    rcbif

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    Here's my little mortar I been working on. Had a kid in machine tech at school make me the barrel to my specs. It's[url] 2.25in[/url] in dia, 4in long with a 3/4 in bore. Made the carriage myself with some inspiration from Heinrich's and 54mountain's mortars. It's painted battleship grey and is adjustible. I'm getting some bushings for the trunions and a few other things before it can fire. Feel free to make sugestion as this is the first cannon I've made I put alot of work into. Got a few questions but only one I can remember is how are cannons colored black? are they painted or blued/browned? Also does anyone have experience with[url] cannonfuse.com[/url]?I needsome fuse and was wondering if they are any good. :hmm:

    [​IMG]
     
    Last edited by a moderator: Oct 27, 2018
  2. Oct 9, 2007 #2

    Darkgael

    Darkgael

    Darkgael

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    I have ordered from[url] cannonfuse.com[/url] - perfectly satisfactory.
    About color - in addition to my KISS GB mortar, which I did not color, I also have a "store bought" GB mortar from Beaufort Naval Works - it is painted black.
    Pete
     
    Last edited by a moderator: Oct 27, 2018
  3. Oct 9, 2007 #3

    54mountain

    54mountain

    54mountain

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    I just plugged my bore and used 5 light coats of cheap flat black paint,
     
  4. Oct 9, 2007 #4

    TheDoubleD

    TheDoubleD

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    Your trunnions should be the same diameter as your bore. All those bolts are going to do is snap off. They should be at welded in place.

    You also need some caps squares "Trunnion caps" or the tube is liable to bounce out and become a projectile.

    You did a heck of a fine job on your base. It looks great.

    Paint the tube black.
     
  5. Oct 9, 2007 #5

    rcbif

    rcbif

    rcbif

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    Darn, anyone else think the trunnions are going to be a problem? I dont have acess to a welder.

    Could I could use a larger bolt or maybe find a tougher grade bolt maybe? :hmm: Those bolts are 1/4in fyi.
     
  6. Oct 9, 2007 #6

    rifleshooter2

    rifleshooter2

    rifleshooter2

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    Yep larger trunnions other than that nice first mortar. :applause:

    Andy
     
  7. Oct 9, 2007 #7

    Darkgael

    Darkgael

    Darkgael

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    Yep again. Larger trunnions. You could try bolting a trunnion across the base of the tube - as it the GB mortars seen in other posts but that would certainly change the appearance of what you have and require alteration of the carriage. The GB mortar is about 2.5" wide and the trunnion is 3/4" which is what you need ideally.
    Pete
     
  8. Oct 10, 2007 #8

    TheDoubleD

    TheDoubleD

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    The problem with the bolts besides being to small is the thread portion is at the shear point. If you are going to make trunnions in that postion on the tube you need a boss that bears the shear force. That requires a recess to support the boss. The thread simply holds the trunnion in the hole. Threads have limited resistance-strength to shear.

    Trunnion bar across the bottom is fairly simple to do.

    [​IMG]
     
  9. Oct 12, 2007 #9

    rcbif

    rcbif

    rcbif

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    What kind of paint should I use? Spray or brush? I'm hopefully going to be able to go to my dads shop to weld the truinions in place. I'm pretty good at welding, I've been praticing in autotech but It probally wouldnt be a good idea to weld my cannon there. :grin:
     
  10. Oct 12, 2007 #10

    TheDoubleD

    TheDoubleD

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    I hope you are going to try and weld those zinc plated bolts.

    You would better off drilling those threaded bolt holes out to the diameter of the bore and slipping in unthreaded round stock and welding that in place.

    The best however would be a bottom mounted trunnion bar.
     
  11. Oct 12, 2007 #11

    rcbif

    rcbif

    rcbif

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    yep, that's what I'm doing. I drilled the holes to 1/2in and I'm welding in some bolts in that I cut the lower threads off so It's pretty much just a threadless bolt. 1/2in is the biggest bit I have so hopeffully that holds.
     
  12. Oct 17, 2007 #12

    rcbif

    rcbif

    rcbif

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    what kind of paint to use anyone? Will any metal spray paint work? :confused:
     
  13. Oct 18, 2007 #13

    Titus

    Titus

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    Thats so cool :thumbsup:
     
  14. Oct 18, 2007 #14

    TheDoubleD

    TheDoubleD

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  15. Oct 18, 2007 #15

    54mountain

    54mountain

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    In regard to paint just about any flat enamel spray paint will work I just used some I picked up at walmart for .99cents a can.
     
  16. Oct 18, 2007 #16

    rcbif

    rcbif

    rcbif

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  17. Oct 27, 2007 #17

    rcbif

    rcbif

    rcbif

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    It's done now. Welded 1/2in rod in place, and added paint. Any suggestions as far as cleaning? Soap and water I'm guessing, are you supposed to oil cannons? :confused:

    [​IMG]

    [​IMG]

    [​IMG]
     
  18. Oct 27, 2007 #18

    54mountain

    54mountain

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    I clean an oil mine just like i do my rifles. Looks great now just grab some balls and have some fun :thumbsup:
     
  19. Oct 27, 2007 #19

    Slake

    Slake

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    I see you've already painted it but just for futher uses if you have a John Deere dealership near by Deere has a paint they call Blitz Black that is great stuff in either a rattle can or qts
     
  20. Nov 9, 2007 #20

    jeepwj992002

    jeepwj992002

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    Holy crap Eric!! You certainly have the bug for sure! Nice mortar! :thumbsup:
     

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