Author Topic: New Tools (Read 1884 times)

armorer77 · « **on:** July 22, 2010, 02:06:43 PM »

I just got a 2.5" drill bit . Look for a "can" sized howitzer in the near future . Armorer77

Double D · « **Reply #1 on:** July 22, 2010, 02:48:51 PM »

Quote from: armorer77 on July 22, 2010, 02:06:43 PM

I just got a 2.5" drill bit . Look for a "can" sized howitzer in the near future . Armorer77

Howitzer, oooh!!!!!

BoomLover · « **Reply #2 on:** July 22, 2010, 10:54:46 PM »

2 1/2 inch drill bit? Cool Tool! Gotta see those when they are finished....please post pics! BoomLover

gulfcoastblackpowder · « **Reply #3 on:** July 23, 2010, 12:45:23 AM »

I'm looking forward to seeing what you come up with.

Cannoneer · « **Reply #4 on:** July 23, 2010, 06:13:11 AM »

Are you going to keep us guessing as to what type of howitzer it is that you've got in mind, or are you still undecided?

armorer77 · « **Reply #5 on:** July 24, 2010, 04:04:45 PM »

The 8" Seige howitzer Model of 1840 looks like a good choice for this caliber .

I have a piece of 4.5" for this . Armorer77

Double D · « **Reply #6 on:** July 24, 2010, 04:32:46 PM »

I wouldn't be surprised if you contacted AOP that they might have the plans for that gun.

gulfcoastblackpowder · « **Reply #7 on:** July 24, 2010, 07:14:41 PM »

That would be really nice. I've always liked the look of Hern's Spanish Howitzer, and that 1840 is very similar.

GGaskill · « **Reply #8 on:** July 24, 2010, 08:08:50 PM »

AOP doesn't list the 1840 8" howitzer but he has a lot of material that has not been made into books. It is worth a call or letter to see if he has any material for it.

Full size overall length is 61.5" so scaled to beer can bore, it would be about 20.2" long (ratio is about one third.)

Turns out that the 61.5" measurement is from the muzzle to the front of the base ring (I think), so the true overall length is about 76" or about 25.25" in beer can bore.

armorer77 · « **Reply #9 on:** July 25, 2010, 11:30:50 AM »

The first one will be freehand , but thanks for the LOA

Terry C. · « **Reply #10 on:** July 25, 2010, 12:47:52 PM »

Round Shot and Rammers has a small scaled drawing of the 8" seige howitzer. If you can get some basic dimension to scale this to, it would be more accurate than trying to pull dimensions off photos.

Cannoneer · « **Reply #11 on:** July 26, 2010, 12:13:09 PM »

Armorer,

I had a feeling that you were going to pick the M1840 8-inch siege howitzer; great choice! I like the simple functional look of the M1861, but there's no question that your choice has a lot more interesting profile.

little seacoast · « **Reply #12 on:** July 26, 2010, 12:44:39 PM »

One of those in half scale and 2.25" would be very cool, any chance?

armorer77 · « **Reply #13 on:** July 26, 2010, 01:12:13 PM »

I am quite busy at work , but there is always a chance . Current tooling limits me to a 12" barrel depth . Armorer77

Double D · « **Reply #14 on:** July 26, 2010, 07:08:54 PM »

Quote from: GGaskill on July 24, 2010, 08:08:50 PM

AOP doesn't list the 1840 8" howitzer but he has a lot of material that has not been made into books. It is worth a call or letter to see if he has any material for it.

Full size overall length is 61.5" so scaled to beer can bore, it would be about 20.2" long (ratio is about one third.)

Wonder if that Length includes the knob.

GGaskill · « **Reply #15 on:** July 26, 2010, 10:02:44 PM »

That 61.5" came from cwartillery.org at Robinson's Battery. Round Shot and Rammers also lists the length as 61.5". However, RSR also lists the Napoleon length as 66" whereas my AOP folio for the Napoleon shows true overall length including the cascable as 72" with 66" being the distance from muzzle to the beginning of the curve around the breech. I vaguely remember reading somewhere that length was measured from muzzle to the front of the base ring; maybe in Gibbon.

Soooo, scaling the RSR drawing using 61.5" as the distance from the muzzle to the front of the breech ring, I would estimate that the true OAL of the howitzer is 61.5" plus about 15.5" more for the breech face and cascable giving about 76" OAL instead of the previously stated 61.5". and further scaling puts the base ring at 23", the muzzle ring at 20 7/8", the rear diameter of the central portion at 21 7/8" and the forward diameter at 20 7/8". Major lengths from front to rear are 18", 24 5/8" and 16". The rear section is cylindrical while the middle and front sections are tapered.

All the above dimensions are estimates from the RSR drawing. The breech face and cascable dimensions could be generated from the formulae in a typical AOP cannon folio.

Double D · « **Reply #16 on:** July 27, 2010, 04:59:29 AM »

Thanks George.

I have been scaling from the line drawing in RS&R. I found the 61.5 measurement also am using this as the base to scale from. I copied and printed the drawing out and measured from this slightly larger drawing.

Scaling for the print out I get base measurement of diameter 7.2 in diameter x 24 in long, and around 200 lb finished weight in popcan bore. Koooll!!!!

Even better, I have learned AOP has the drawings for this gun $20 +postage special order.

JeffG · « **Reply #17 on:** July 27, 2010, 08:38:39 AM »

Quote

Howitzer, oooh!!!!!

2.5? will you come and help me convince my wife I really, really need one?

Double D · « **Reply #18 on:** July 27, 2010, 08:44:53 AM »

Quote from: JeffG on July 27, 2010, 08:38:39 AM

Quote
Howitzer, oooh!!!!!

2.5? will you come and help me convince my wife I really, really need one?

Not much that scares me, The W word does!!

armorer77 · « **Reply #19 on:** July 27, 2010, 02:04:00 PM »

This is taking on a life of it's own . I can't start this immediatly , first is the $180 for a bar of steel to cut from . second my steady rest only holds 6.5" , third I need to install a hoist over my lathe to get 300+ lbs in and out of the chuck . I will have to cut the first one in GB bore and then I should be ready to move up to the big boy . I hope no one is too dissapointed . Armorer77

Double D · « **Reply #20 on:** July 27, 2010, 03:27:11 PM »

A golf ball gun would need a piece 4 3/4" x 16" and before you cut all the parts off that are not a cannon would weigh around 80 lbs.

I don't think any one would be disappointed in a golf ball gun made to these dimensions. My 1 inch Cairo gun is 4 inch at the breech and 21 inches long and it is a substantial gun.

armorer77 · « **Reply #21 on:** July 28, 2010, 01:19:04 PM »

That sounds doable . I think I will find aome other design for the "can" bore .

GGaskill · « **Reply #22 on:** July 28, 2010, 02:11:09 PM »

A mountain howitzer scaled/bored for beer cans would be 21 1/8" long and 4 5/16" diameter at the base ring. You would have to be careful about the trunnions as the wall thickness is pretty thin.

seacoastartillery · « **Reply #23 on:** July 28, 2010, 04:52:35 PM »

Before anybody less familiar with the use of large drill bits runs out and buys one at an auction or a used tool place and somehow adapts it to his Sears-Craftsman floor mount drill press in hopes of duplicating armorer77's work, heed this warning well: the quickest way to break ALL Your Fingers and Maybe and Arm or Two is to get wrapped up in your work which has ripped loose because your large bit grabs the work piece SUDDENLY, without warning, and a reflex action on your part compounds the problem by getting your clothing caught in your large bit which will wind the clothing and you up before you can say FECES!!

You are not ignorant of the dangers anymore! If you do not own a lathe of sufficient size, DO NOT attempt this type of work.

FYI,

Mike and Tracy

Terry C. · « **Reply #24 on:** July 29, 2010, 07:35:17 AM »

True dat!

The stress on the work increases exponentially with every incremental increase in drill diameter. I've had big drills twist parts out of heavy vises and gouge deep grooves in stock from the teeth on the chuck jaws.

I even saw a large (7" bore, about 8' long, about 300 pounds) cylinder barrel swing about 270 degrees and slam into the mast on a big radial drill when a 4" spade drill caught a good bite in the mounting boss. Operator thought it was "heavy enough to stay put."

He was wrong.

Luckily he did not get hit. IMHO should have been sent packing but he really was a good guy other than this momentary lapse in judgement.

dan610324 · « **Reply #25 on:** July 29, 2010, 08:14:19 AM »

thats an very very good advice
you dont know how powerful a geared 5 hp motor is
and when you get to know it it can be toooooo late

if you are a little sensitive to look at accidents and such things D O N T open this picture
and this picture is the least scary in a serie of five from this australian accident

I wasnt sure if I should attach it or not , but this is so important that people are aware about the dangers
not only in shooting cannons , BUT ALSO IN BUILDING THEM
we talk a lot about safety in the shooting ,
but this is for what I know one of the first times the dangers in building them have been mentioned

so be very careful out there folks
even a small drill press are much stronger than you are

<< picture removed by CW by request -- a bit too graphic >>

dan610324 · « **Reply #26 on:** July 29, 2010, 10:50:49 AM »

yeah it was a really strong picture
just hope that you folks who doesnt have a lifetime experience with machining
takes it very carefully when you use machines that you aint totally familiar with

Cat Whisperer · « **Reply #27 on:** July 29, 2010, 01:59:21 PM »

There are few things in life that stick with you more vividly than watching someone die or get injured.

Somewhere along the line we then make the decisions to DO things more safely.

Thanks, Dan, for bringing safety to the forefront. We don't have the time to make all the mistakes ourselves, and HAVE to learn from others' mistakes.

armorer77 · « **Reply #28 on:** July 29, 2010, 02:07:42 PM »

In this safety vien , I have made many mistakes , but I take great pains not to repeat them , especially the painful ones . Any machine can kill you if you fail to respect it . Armorer77

dan610324 · « **Reply #29 on:** July 29, 2010, 02:38:13 PM »

yeah , and after a serious or fatal accident you cant just regret it