homemade bowling ball firing mortar!

[Swoop]

http://www.docsmachine.com/nonPB/mortar.html


quoted:

Ah, serendipity. Being in the right place at the right time.
As it happened, this fine and sunny September Sunday morning found me and a few others at the local gun range, sighting in- or trying to- some rifles. Some were cooperating, some weren't. A normal outing to the range, really...

Until this fellow pulls up and starts unloading a big 'ol hunk o' pipe.



I thought he was going to bury it as a new target stand or something.... 'til I saw the Bowling Balls. It could only be what some call a "punt" mortar! I'd seen similar handmade ones on the 'net and in magazines... naturally, we all completely forgot about our own rifles for the moment.



The Gun Range is a nice place- raised, covered shooting line, plenty of tables, well-kept grounds. The first line of targets is at 100 yards, with small berms and pipe target stands at 200, 300 and 400 yards as well, plus a trail/road to drive up to 'em if you need to. And at 500 yards, right at the base of the stand of trees off in the distance, is a full-size steel cutout of a moose, painted day-glo orange. Above, the guy with the mortar is pouring in some three ounces of Fg (coarse) Pyrodex black powder...



This thing is huge! Probably weighing some 150 pounds, half-inch-nominal wall pipe with a massive two-inch-thick breechblock welded on one end. The touchhole or fuse passage leads to a small "chamber" in the center that holds the powder in a single spot, rather than letting it cover the whole 8.5" bore.



Crude, yes, but it works. The owner is reluctant to do any additional welding on the pipe, for fear of making a weak or brittle spot, so he just stacks up whatever's handy to hold it, oh, 'bout there or so. This thing's so cool I want to make the guy some adjustable legs like the old 4.2" Chemical Mortar had....



Three ounces of Pyrodex, an old garage-sale-special bowling ball, an old chair and some sewer pipe... Fire in the hole!



He's not running, but he ain't dawdling either! Let's see, the fuse burns at about one minute per foot, there's about six inches there... dum da dum... carry the three...



HOLY FREAKING BATTLESHIP MISSOURI! By the time the shutter snapped, the ball was, in relation to this picture on your screen, about six monitors up and climbing. It was whistling. I lost track of it since I was trying to get the picture, but the guys say it cleared the treeline by probably another hundred yards.

[Swoop]

Let's do that AGAIN! Rod out the fuse hole, make sure there aren't any errant embers, pull the mortar up out of the divot it created, weigh out another charge of powder, another bowling ball... This time I was watching downrange with the camera pointing at the cannon... Holy Creeping God, ladies and gentlemen! That ball was screaming out of there! I'd wager it landed over 600 yards downrange.

I should have brought out my Radar Chrony. I'd guess that ball wasn't moving over 700 fps, possibly as low as 400 fps, but jeez, think of the mass! That ball's what, eight to ten pounds?!? What's the Hatcher's Index of a projectile weighing fifty-thousand grains moving at 400 fps? "Body armor" against this thing is eight feet of dirt over a concrete bunker!



Think Grandpas' old thirty-thirty is a kicker? How about a hundred-plus-pound gun that pushes itself into the dirt six to eight inches each time it goes off? This is not a shoulder arm.

After all four balls were expended, we helped load it back in the guy's car. I noted that there were some divots from earlier shoots... he said he gathers up old balls whenever he can find 'em, then when he has a few, on a nice day he'll come out and blow 'em downrange. Says it always draws a crowd. I said "so there's already a few balls out there in the swamp, eh?"
"Oh, more than a few, yeah."

He says he also has a short cannon that takes small tomato-sauce cans and another mortar that takes soda cans. The soda cans, it seems, don't hold together well- the force of firing blows the can off the concrete fill, which then blows up in the air.

Besides, he says, NOTHING beats seeing that bowling ball howl downrange as far as the eye can see.

I agree. The pictures don't do this justice; this is something every Tinker or gadget freak should see in person at least once in their life.







I want one!

[JB88]

nice.  great description too.

[lazs2]

They let you have pyrodex in your country?

I am going to buy a repo 1858 remington revolver.. it shoots cap and ball and blackpowder (or pyrodex) and..

you simply call and order it and UPS delivers it right to your porch... just like in the old days when you could order any gun in the mail including a 20 mm semi auto cannon.

I watched the dentist down the street fire his 20 mm cannon (delivered to his door with no paperwork)  back in the 60's ... we shot it out at the dump at a junk washing machine...  very cool.

lazs

[Meatwad]

Now that was pretty neat!

[Jackal1]

I expect a bowling ball ban proposal in the near future.

[Chairboy]

Lazs, I can buy Pyrodex at my local Bi-Mart, which is a grocery/sporting supply store here in Oregon.

[Saintaw]

What kind of helmet do you wear when you are on the receiving end of this contraption?

[GtoRA2]

that was pretty damn awesome.

[FBBone]

Wow, he reinvented the cannon!  Wonder what he's working on now, the wheel?

Unimpressed.

[JimBear]

He wasnt applying for a patent, just having fun.  


What did you do today?

[lazs2]

chair... swoop doesn't live in oregon.

lazs

[Swoop]

nah I live in Englandistan.

[Chairboy]

I got the impression, lazs, that you were suggesting that finding a country where pyrodex IS available was unusual.  My mistake, I guess.

[john9001]

rep Reid say they will not seek a ban on bowling balls, however you will have to register them.