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construction materials

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Re: construction materials

Unread postAuthor: bigbob12345 » Thu Feb 28, 2008 10:28 am

roygaddis wrote:Not that anyone asked,but in my humble opinion the best expansion chamber is made from a large,(say 20 lb) fire extinguisher tank.The best barrel is made from a piece of 1" copper pipe about 4' long.The best propellant is oxygen and butane,and the best projectile is the bottom end of a ski pole wrapped with cord and topped with shrink tube.You won't blow it up,the smaller barrel concentrates more force,the propellant burns completely and the projectile will penetrate just about anything.Even rock.I've fired through both car doors and into a 55 gallon drum on half a balloonful of oxygen and two tiny shots of butane.C batteries work pretty good,too.Or you can use a 11/4" barrel and use those cheap,driving range golf balls -with the shell taken off- as projectilesThey will bounce back after going through a cinderblock and two bricks,though,so shoot from behind protective cover.

I highly disagree I belive the best chamber construction matieral is any metal rated to high pressure.
And the best propellent is helium.
And the best ammo is anything very heavy.
And the best barrel is a golf ball barrel
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Unread postAuthor: Jared Haehnel » Thu Feb 28, 2008 10:46 am

I think your going to find that opions vary widely on best bore diameter best materials or fuel for spud guns based on what we like to do with our spud guns...

I like distance so my guns generaly are more like cannons with larger bore and large chambers...

Some people like to just plink and there guns tend to be smaller with small bores to facilitate thier particular intrest...

Thats the cool thing about any hobby is the products often vary as widly as the hobbists who biuld them... there is no right or wrong only a way one prefferes to do it....

The real nice thing about this forum is that it brings together hobbist from all over world to share ideas, educate others, brian storm new ideas and make the hobby more fun to participate in...

So before posting an idea or an opinion you might want to post it in a way that you share the information rather then tell it the way it is. That way it helps us all to learn from your design an perhaps to include improvements to our own design or to suggest ideas that may help you to improve your design...

Any why I'm probably droning on but this is my "humble opinion" 8)
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Unread postAuthor: MrCrowley » Thu Feb 28, 2008 1:26 pm

Funny how the OP hasn't replied :roll:
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