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Author Topic: Brass rod for small cannon?  (Read 942 times)

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Offline Mike Scott

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Brass rod for small cannon?
« on: October 10, 2011, 06:48:26 AM »
What type of brass rod stock would be a good choice for a small bore cannon (probably 1" diameter rod for about a .30 caliber cannon)?
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Offline GGaskill

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Re: Brass rod for small cannon?
« Reply #1 on: October 10, 2011, 10:03:44 AM »
C36000 is pretty strong and with that small a bore, should be OK.
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Offline Mike Scott

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Re: Brass rod for small cannon?
« Reply #2 on: October 11, 2011, 04:47:22 AM »
Thanks.  And I think I have decided to build a "firecracker" cannon this time.
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Offline irishman

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Re: Brass rod for small cannon?
« Reply #3 on: October 11, 2011, 06:16:28 AM »
Mike Scott,
 
     Go to 'backyard cannon fun' and look at the firecracker cannon there, read response after response.... 30,000+ views. It was designed by Rays89 and built by us for years. We have sold them all over the world. They are considered by some of the best and brightest on this board to be 'bullet proof'. They are made out of 3/4 stock, FC360. It should be noted that, altho, we are having discussion about a redesign, no specific diameter has been decided on.
 
                                        Michael
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Offline Mike Scott

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Re: Brass rod for small cannon?
« Reply #4 on: October 11, 2011, 12:25:21 PM »
What bore diameter is usually used for these?  Does the powder charge light the firecracker fuse?
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Offline Cat Whisperer

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Re: Brass rod for small cannon?
« Reply #5 on: October 11, 2011, 02:28:51 PM »
In my firecracker cannons, I'll load with a pinch of black powder, put the firecracker into the bore fuse-end first (after shipping it off), and use the fuse to ignite the main charge.  YES, the firecracker is lit by the blackpowder. 
 ;)
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Offline Mike Scott

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Re: Brass rod for small cannon?
« Reply #6 on: October 12, 2011, 06:12:27 AM »
The plan is coming together!  It's about time to order some metal. 
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Offline Mike Scott

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Re: Brass rod for small cannon?
« Reply #7 on: October 12, 2011, 06:50:27 AM »
Austin,  You have a PM. 
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Offline irishman

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Re: Brass rod for small cannon?
« Reply #8 on: October 12, 2011, 06:54:00 AM »
Quote from: Mike Scott on October 11, 2011, 12:25:21 PM
What bore diameter is usually used for these?  Does the powder charge light the firecracker fuse?

Mike Scott,
 
     THE TRADE SECRET IS:  use 19/64 (.296). Our extensive research has 'learned' us that this is the perfect diameter bore for the longest launch with standard Black Cats. 10 grains ffg Goex, firecracker fuse first, moderate tamp, light and BANG, BANG!
 
                                      Michael
 
OK! OK! JB, I'll spit it out! THE SECOND TRADE SECRET IS: for a 'Split Personality', put the crackers away. Load with 30 grains ffg, add wadding, tamp, tamp again, light and now you know what a split personality is.
 
                                                  Michael
 
 
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Offline Mike Scott

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Re: Brass rod for small cannon?
« Reply #9 on: October 12, 2011, 09:42:17 AM »
I promise I will not reveal the secret.  :) 
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Offline projector

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Re: Brass rod for small cannon?
« Reply #10 on: October 12, 2011, 10:09:54 AM »
It's a good secret, everyone takes notice...no one expects so much bang out of such a small thing.
 
I'm getting 50/50 results in the cracker getting lit.  maybe cheap crackers, maybe too much powder.
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Offline irishman

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Re: Brass rod for small cannon?
« Reply #11 on: October 12, 2011, 10:55:43 AM »
Joe,
 
     Try backing off the powder charge by one grain. You should be experiencing 98% or better. Package on way to you.
 
                                Michael
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Offline projector

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Re: Brass rod for small cannon?
« Reply #12 on: October 12, 2011, 01:50:35 PM »
I figured that...can't help myself.
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Offline keith44

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Re: Brass rod for small cannon?
« Reply #13 on: October 12, 2011, 10:26:30 PM »
projector, I have found that if launching the grey fused blackcat firecrackers use 2F (8 grains), if using green fused Blackcat "dynamite" firecrackers 12 grains of 3F does a great job  ;D
 
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Offline projector

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Re: Brass rod for small cannon?
« Reply #14 on: October 13, 2011, 09:12:04 AM »
Quote from: keith44 on October 12, 2011, 10:26:30 PM
projector, I have found that if launching the grey fused blackcat firecrackers use 2F (8 grains), if using green fused Blackcat "dynamite" firecrackers 12 grains of 3F does a great job  ;D

That could be the problem, cheap fire crackers.  I got sucked in by the "buy one get a million for free" deal at the fireworks store arround the 4th of July.  Call me cheap.
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Offline keith44

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Re: Brass rod for small cannon?
« Reply #15 on: October 16, 2011, 02:32:53 PM »
Quote from: projector on October 13, 2011, 09:12:04 AM


That could be the problem, cheap fire crackers.  I got sucked in by the "buy one get a million for free" deal at the fireworks store arround the 4th of July.  Call me cheap.

 
CHEAP   ;D ::) ;D
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