new guy new cannons

[Double D]

Ernie didn't say it he quoted it!

[RocklockI]

Well then , he had the stones to quote it ! I'm sure he's blind in one eye now for it  too .

some folks are blind in both eyes and do not know any better .

[dan610324]

sorry dd if I caused such an mess by my ignorance in the english language
but now I used the lexicon and learned that "skit" ( the swedish word )  is the same as excrement ,
so I will try to remember to use that word in the future , or is feces better ??
Im willing to do almost anything to not upset the american families who are reading this
I suppose that even americans  ....   at least swedes do

[carronader]

I think one of the best qualities on this forum is the true Passion shown on Safety , I for one would rather see a ' vulgar ' word when used in such an important subject than a few ... tsk tsk's . There should be " No Compromise on Safety "   ......' dirty word '   I thought this is an adult forum. 
 Anyway , it's so difficult to tell with Olaf Ravenbreath if he is using less than Sunday School language , not so long since these guys put away their Horned Helmets.

[dan610324]

what do you mean by  "put away"  ??

WE STILL USE THEM   

[carronader]

Can't be much call for getting the boats out now Dan . All those plump , rich little coastal Towns in England are very much in a sad state now , and the food's terrible. Dragon was on holiday last week  , was dragged off to Rye ( East Coast ) some Russian forum said it was ' quaint '. Going downhill more like , pokey little castle......3 repro cannons.....and 2 which look like authentic barrels. Supposed to be old Pirate haunt . Website should be prosecuted for fraud. Standard  old church , been burnt out inside  proly your ancestors many many years ago.......usual tourist 'antique shops' about it really. 2  x 32 pdr check out as proly authentic - length..weight etc. it's just that even under all that paint the marks look a bit too clean and sharp    could be just my natural distrust of East Coast and English.

[carronader]

some detail on 32 pdrs.  No plaque on 32 's   I'm taking it they're presenting these as authentic George 3.

[little seacoast]

Those do look suspiciously nice for the age and being outdoors.  Perhaps it's the "quaint" that keeps away damage and degradation, powerful stuff you know.
I rather like the pokey castle, is that a stoned up arrow slit and wall damage on the tower in the last shot?  Perhaps additional doses of quaint will help it grow into another Edinborough Castle in time. 

[Double D]

I suppose I could go on for hours about the bad language, I sometimes find the terms more useful to describe certain conditions or feelings. Sometimes I find my self a bit tongue tied try to say things without using some of those very expressive terms.   It's just the policy of GBO to not use it. It's one of the conditions put upon us to use the site, I accept  that,  so lets don't.

[dan610324]

sorry dd , but thats the only way I could translate that very commonly used swedish expression for an extremely bad welding

and it sure was of an extremely low quality, dont think I ever seen something like that before

[carronader]

Douglas , foreigners shouldn't be allowed on here anyway.   yup it's an arrow slit   can't really call it an embrasure ( that's for cannons usually )   arrow slit will do for me.

[Cannoneer]

sorry dd if I caused such an mess by my ignorance in the english language
but now I used the lexicon and learned that "skit" ( the swedish word )  is the same as excrement ,
so I will try to remember to use that word in the future , or is feces better ??
Im willing to do almost anything to not upset the american families who are reading this
I suppose that even americans  ....   at least swedes do

                                                                                                                                                                                                                               

[1Southpaw]

I was in a "skit "once , it is like a very short play , or perhaps more like a few paragraphs from an Act .
  Don't recall any one getting all in a wad over the "skit" material.   

It was in an elementary school to boot .

Long live "skit "   ,   for some times life is skitty .......

Sorry no black powder can to illustrate how much skit I am in . 

Fear not to quote long as the material is properly credited . 

[dan610324]

boom and south

now you are naughty boys

[carronader]

then there's the old Scottish term  skitters     you really don't want to know    it's that Southpaw Douglas   I really can't resist it    you need to get him neutered or something    he's such a bad influence.   Bad Southpaw.

[RocklockI]

Thats was a skiddy skech too , you crazy buckroo .

1Southpark keepem coming .

[partsproduction]

 I've come across some seamless heavy wall tubing many times, stuff with the wall more than bore diameter thick, commonly called Shelby tubing. Most of it is 1018, but can be gotten in stronger alloys like 4140. A little study and it can be found.

 I've been thinking of making a cannon for many years, and it never once occurred to me to weld the breech plug in, only to thread it at least a minimum of 1 1/2 diameters deep. What is  common practice? I'm sure I'd never trust any weld.

 Why are people calling it a "breach" plug? Is that the correct spelling?

 The practical way to make a tube without casting, how to install the trunnions? I've kicked that one over for many years in my head. Thread it full diameter into just short of the bore (With a larger shoulder into a counterbore) and weld it? The amount of recoil force it will be required to withstand is fierce, and the end of threaded part should be squarely in hard contact with the flat bottom of the hole I figure. That's a lot of careful machining. I figure to make it contact the trunnion band shoulder at the same time as it contacts the bottom of the flat bottomed hole, to spread the forces over the larger shoulder of the trunnion while resisting expansion from the bore at the other end.

 Rifling, there's no way I'd make one without rifling it, so I'd need to make my own rifling machine. The amount of twist, that's a science, not a guess.

 The point is that as I mull these things over in my head I always end up admiring what others have done instead of doing it myself, but that could change. I have a large French lathe with a 3 1/8" hole through the headstock and 60" between centers.

 If I do make one it will be able to take the pressure. No doubt about that part.

[RocklockI]

Welcome aboard parts pro !

[seacoastartillery]

 I've been thinking of making a cannon for many years, and it never once occurred to me to weld the breech plug in, only to thread it at least a minimum of 1 1/2 diameters deep. What is  common practice? I'm sure I'd never trust any weld.
    
    Listen up everybody.  Partsproduction definitely has his head screwed on straight.  He understands, as every gunsmith who is worth a darn does, that you do not need to weld over a properly threaded breech plug!  Ever!  Welding is O.K. as long as you have also heat shrunk the breech plug in first or cross drilled and tightly fitted a strong pin first AND, AND remembered to NOT GRIND off 3/4 of your weld as you finish shaping the Cascabel area (Rear of Breech)!  Seen that Large error more than once.  We use threaded only breech plugs, 1.3 X (the bore diameter).  1.5 would be O.K. too.
[/i]

    Why are people calling it a "breach" plug? Is that the correct spelling?  Who knows; they are wrong, enough said.  It's an artillery 'breech'.  Period.

 
    Rifling, there's no way I'd make one without rifling it, so I'd need to make my own rifling machine. The amount of twist, that's a science, not a guess.  We like the sound of that; take a look at our extensive article (thread) 'How to make a Rifling Machine A to Z'.  It may give you some ideas.  They are simple machines and inexpensive too.  Click on link here:  http://www.gboreloaded.com/forums/index.php/topic,108012.0.html

Good luck!  We are betting you will build a SAFE cannon and a nice looking one too.

Mike and Tracy

[partsproduction]

 Actually I did read your thread about a rifling machine right after posting. I have a friend who made a rifling machine years ago with a sine bar, interestingly, one could easily do progressive rifling by using a curved bar. His machine was made for BP rifles, and he said the work was done with a "saw" that was shimmed up occasionally. (If I remember right)

 Do you think my idea of the trunnion being seated into a same sized threaded hole and run down tight to the square bottom and simultaineously to a larger shoulder counterbored into the barrel is right? Would welding that be unreasonable? The idea is that it would never need to be removed and a properly dressed weld would look like a cast radius. This is all in lieu of actually making the sand mold and doing it "right" (Thought I believe a rolled 4140 tube of equal thickness would be stronger than even a cast steel tube.) I do worry about loss of strength in the areas where the holes are, even filled with a threaded trunnion.

 In your thread you put it all in perspective when you spoke of not deluding oneself into thinking it could be done fast, it would be a long term project, at least the first one. 

[RocklockI]

Actually I did read your thread about a rifling machine right after posting. I have a friend who made a rifling machine years ago with a sine bar, interestingly, one could easily do progressive rifling by using a curved bar. His machine was made for BP rifles, and he said the work was done with a "saw" that was shimmed up occasionally. (If I remember right)

 Do you think my idea of the trunnion being seated into a same sized threaded hole and run down tight to the square bottom and simultaineously to a larger shoulder counterbored into the barrel is right? Would welding that be unreasonable? The idea is that it would never need to be removed and a properly dressed weld would look like a cast radius. This is all in lieu of actually making the sand mold and doing it "right" (Thought I believe a rolled 4140 tube of equal thickness would be stronger than even a cast steel tube.) I do worry about loss of strength in the areas where the holes are, even filled with a threaded trunnion.

 In your thread you put it all in perspective when you spoke of not deluding oneself into thinking it could be done fast, it would be a long term project, at least the first one. 

thread and weld imho .......i

[Double D]

Check the Safe loads and Cannon plans sticky and click on the link to the N-SSA Rules PDF. Look in the section on cannons and find the description on how to shrink fit and weld a breech plug.

Breach or Breech?  We don't stand on formalities, spelling errors and bad grammer are overlooked---good thing, I'd be in a lot of trouble...but it is breech.

I like threaded and welded trunnions. I like the way you suggest.  Just make the rim boss the threaded section.

[Victor3]

  Do you think my idea of the trunnion being seated into a same sized threaded hole and run down tight to the square bottom and simultaineously to a larger shoulder counterbored into the barrel is right?

I do worry about loss of strength in the areas where the holes are, even filled with a threaded trunnion. 

 Keep in mind that the thinnest section between the bore and a flat-bottom trunnion pocket will only be at a line parallel to and at C/L of the bore. Material is progressively thicker away from center. Pressure half way up the bore is greatly reduced compared to the chamber area. Properly designed to handle pressure at the pockets, your method of mounting trunnions will be no problem.