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dan610324
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« Reply #180 on: March 28, 2008, 03:39:24 AM » |
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Im not  my thoughts was to use it for moose hunting in long distance ;-)) ;-)) |
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Dan Pettersson
a swedish cannon maniac
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lance
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« Reply #181 on: March 28, 2008, 09:33:28 PM » |
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dan610324
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« Reply #182 on: March 29, 2008, 01:57:54 AM » |
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DON'T DO IT it would be an disaster for the whole mankind , of course it would be an nano world war . never threaten me again  then I will build an longdistance gun in 0,1 mm caliber . with that Ill easily wipe out your whole continent with one round  ok maybe time to get serious again , whats the smallest commercial available fuse is there anything smaller then 1 mm ?? I know I have seen 1 mm fuse .
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Dan Pettersson
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better safe then sorry
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lance
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« Reply #183 on: March 29, 2008, 01:13:55 PM » |
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Dan, the smallest fuse i have is 1mm . What i did for the pico-gonne is to make the vent as a priming cup. The top is big enough for a 1mm fuse, the bottom of the vent that makes contact with the bore is just a pin hole. Let me know how many thousands of shots you can get from a pound of powder.
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dan610324
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« Reply #184 on: March 29, 2008, 02:04:16 PM » |
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approximately 0,2 grain including priming powder FFFFFFFFFFFFFFFg for each round , that means approximately 75 000 rounds per kilo , OK 33 863 shots with an pound . I lost a few grains when milling it down from ff to ffffffffffffffffff ok serious again , could you guesstimate what size from the priming cup to the bore ?? what would be the smallest size that still will be sort of reliable ?? would it be possible to get ignition from an hole of 0,1 mm ?? of course I cant use ffg then ;-) |
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Dan Pettersson
a swedish cannon maniac
interested in early bronze guns
better safe then sorry
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GGaskill
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« Reply #185 on: March 29, 2008, 02:29:53 PM » |
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Just needs to be bigger than your largest powder grain.
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GG
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Cat Whisperer
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« Reply #186 on: March 29, 2008, 02:45:56 PM » |
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just an theoretical question ,
lets say I would build an cannon with an 1 mm bore ,
how large can the touch hole be without loosing to much power that way ??
Theoretical is right! 0.039" is ROUGHLY the diameter of the head of a pin .... So to put the original question back in the game, what ratio of bore diameter to fuse hole is needed to only loose, say, 1% of the energy? Obviously smaller is better. |
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lance
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« Reply #187 on: March 29, 2008, 04:39:15 PM » |
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Dan, i would say it's possible to have a small vent like you want. So here's an experiment you can try. Get a group of different sized HYPODERMIC NEEDLES. Plug one end, drill-file-grind a vent in the side of the needles. Of course you have to make PROJECTILES too!
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seacoastartillery
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« Reply #188 on: March 29, 2008, 04:47:16 PM » |
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Comments deleted. TK
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« Last Edit: April 16, 2008, 03:14:41 PM by seacoastartillery »
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They sends us along where the roads are, but mostly we goes where they ain't:
We'd climb up the side of a sign-board an' trust to the stick o' the paint:
We've chivied the Naga an' Looshai, we've give the Afreedeeman fits,
For we fancies ourselves at two thousand, we guns that are built in two bits - 'Tss! 'Tss!
From......"The Screw Guns" by Rudyard Kipling
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dan610324
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« Reply #189 on: March 29, 2008, 05:25:12 PM » |
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Dan Pettersson
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Terry C.
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I see what you did there...
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« Reply #190 on: March 30, 2008, 11:03:36 AM » |
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A little bling for the micro... Rummaging through my junk, I found a brass torch hose ferrule with a 7/16" ID that matches the OD of my micro-gonne tiller... I had to ream the end hole for the ferrule to slip over the 3/8" pilot on my tiller, otherwise it was a perfect fit.  The ferrule slips on and then the barrel is screwed into place. The lip on the ferrule is clamped between the rear of the tiller socket and the shoulder cut into the wood.  There are numbers stamped into the brass that I usually turn toward the bottom. I didn't do it this time because I was in a hurry and forgot. Under normal circumstances the numbers aren't noticeable, anyway.  You may remember that I was having problems with my old two megapixel Samsung camera recently. It finally gave up for good last week. So now I'm on the learning curve of a new one, a six megapixel HP. It has the potential for great photos but I'm going to have to get the feel of it first. I'd used the old camera for so long it had become second nature. |
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Cat Whisperer
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« Reply #191 on: March 30, 2008, 11:11:33 AM » |
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That brass is a NICE touch!
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MikeR C
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« Reply #192 on: May 29, 2008, 08:05:56 PM » |
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I was sorry to see this thread kinda peter out. The pic below is of the breach loader this thread got me started on. It shoots firecrackers.   I have drawings I will post in a new thread... Thx MikeR C |
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« Last Edit: May 29, 2008, 08:25:43 PM by Double D »
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EL Cazador 66
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« Reply #194 on: May 29, 2008, 08:35:54 PM » |
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OUTSTANDING!!!
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MikeR C
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« Reply #195 on: May 29, 2008, 09:32:40 PM » |
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My original idea came from the bottom cannon in this sheet...
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rays89
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« Reply #196 on: June 18, 2008, 04:19:10 PM » |
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Well I had to put my 2 cents in. Sorry now powder can but I do have normal size fingers http://youtube.com/watch?v=D4C5R55mrZM |
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rays89
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« Reply #197 on: June 18, 2008, 04:22:05 PM » |
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Heck I am going to toss the other 98 cents in cause I don't have change. Its a little larger with a one inch bore http://youtube.com/watch?v=rtgTJvRtdLI |
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EL Cazador 66
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« Reply #198 on: June 18, 2008, 04:23:42 PM » |
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Sweet! can you post a few close up pictures.
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