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Califbill

wrote:
On Mon, 5 Oct 2015 20:17:53 -0700, Califbill billnews wrote:

wrote:
On Mon, 05 Oct 2015 19:59:11 -0400,
wrote:

On Mon, 05 Oct 2015 19:22:44 -0400, wrote:

On Mon, 05 Oct 2015 17:25:21 -0400,
wrote:

On Mon, 05 Oct 2015 17:05:51 -0400, wrote:

That might do something in 20 or 30 years but we need an answer now.
There are hundreds of millions of guns here now, if they stopped
making them tomorrow.

===

Before too long someone will figure out how to make an automatic
weapon on a 3D printer. Control that.

As soon as they make a 3d printer that works with steel "ink".
Right now all they can make are the parts that don't see the pressures
and the impacts. Guys have made the frame and some other parts.
OTOH those parts that can't be plastic are generally consumables so
they are not serialized or controlled. (barrels, firing pins,
extractors, springs and such)

===

Even the 3D printers of today can be used to make high precision
templates which an amateur machinist can use with jigs, routers,
Dremel tools, etc. to turn out everything that's needed. It's just a
matter of time before the plans show up for downloading along with a
couple of "how to" videos on YouTube.

If you have a lathe and a milling machine you can make pretty much
everything but the barrel, assuming you are making a rifled bore.

I made a smooth bore .22 that worked from a car antenna and a bunch of
fiberglass wrapping. It was chucked up in a cap gun with most of the
hammer filed away. The problem was the brass came out the back almost
as fast as the bullet went out the front.

My dad owned a major machine shop. We made a few breech loading cannons,
mostly Jetex fuses through the drilled out bolt. Would put a 5/16 ball
bearing pretty much through a 4x4.

I still have my cannon. It was a souvenirs deal with a cast iron base
and a solid brass barrel. I drilled it out to a clean 1/4", put a
sling shot ball in it with a little bit of paper towel wadding and use
the material from kitchen match heads for powder. You just broke the
white tip of a kitchen match off in the touch hole (before you load
it) and touched it off like the old style cannons with one of those
long fire place matches. I am not sure about a 2x4 but it would go
through 1" (3/4) white pine.
I saw it in the garage the other day in a drawer with some of my other
dangerous old stuff.

Did anyone else have a Henleys formulas book? I had the old red one
until it fell apart and I found a reprint with a black cover some time
in the early 70s.
Screw Tropic of Cancer, That was something that should have been
banned. I am surprised I am still alive,

Berges blasting powder was neat tho. (potassium chlorate, potassium
chromate, sugar and a pinch of wax).
Potassium chromate and sulfur (AKA fulminating powder) is what goes in
"torpedoes". Those things you thrown and they explode. Just use a few
chunks of fish tank gravel, a pinch of the powder and wrap it in paper
mache'
When it dries out, you got ya sumpin.

The potassium chlorate is the only one that is hard to by but our
chemistry teacher had an account at Fischer Chemical and I used to
help him out, picking up a few things for him. Everything was cash in
those days so I just added a bottle to the order ;-)
I still may have a little in that drawer. I think there is some zinc
powder in there too. Great rocket fuel when mixed with sulfur but
potassium nitrate and sugar works too. You have to melt that and it is
a little scary the first time you do it
.Rocket motors are co2 cylinders drilled out to 1/4" and you put them
in a Bering cigar tube. Shoot them out of a 1" pipe and say goodbye. I
don't think we ever found one.
I never had much luck with the gun cotton and I was smart enough not
to try nitroglycerine

We used gun powder for the cannon. Dad's buddy was the range master for a
military range the NG and FBI used, so dad got lots of very cheap ammo. We
would disassemble.06 rounds.