Author Topic: Advice to a greenhorn? (Read 3266 times)

GGaskill · « **Reply #30 on:** January 01, 2023, 04:20:44 PM »

I like your Rook idea so much that I have drawn a pattern and bought steel.

GTS225 · « **Reply #31 on:** January 01, 2023, 06:22:10 PM »

A cosmetic detail I had in mind was to have a set of stairs "entering" the "tower" right where the touch hole is, whether it's fuse or powder ignition. Being as it's supposed to look like a castle guard tower, I thought that little detail would really set it off.

I trust you'll share pictures with us.

Roger

Double D · « **Reply #32 on:** January 02, 2023, 02:30:13 AM »

George that is awesome!

Can I copy?

Wes Pilley some years ago gave me a chunk of steel that would be perfect for this!

GGaskill · « **Reply #33 on:** January 02, 2023, 06:56:35 PM »

Anyone is free to copy it. I like the idea of a decoration around the vent. I was thinking of making light concentric circles up the side and repetitive vertical lines between them to simulate the joints between the blocks.

I can email the drawing to anyone who wants it.

GTS225 · « **Reply #34 on:** January 03, 2023, 02:45:16 AM »

Quote from: GGaskill on January 02, 2023, 06:56:35 PM

Anyone is free to copy it. I like the idea of a decoration around the vent. I was thinking of making light concentric circles up the side and repetitive vertical lines between them to simulate the joints between the blocks.

I can email the drawing to anyone who wants it.

Great minds think alike. My only concern with the faux block/grout lines is if that would engineer in fracture points, much like the old "pineapple" hand grenades of WW2. If the wall thickness was there, there wouoldn't be a worry. Then too, it's not like anyone is actually firing a projectile from a thundermug.

Roger

ulav8r · « **Reply #35 on:** January 03, 2023, 03:24:19 PM »

Quote from: GTS225 on January 03, 2023, 02:45:16 AM

My only concern with the faux block/grout lines is if that would engineer in fracture points, much like the old "pineapple" hand grenades of WW2. If the wall thickness was there, there wouoldn't be a worry. Then too, it's not like anyone is actually firing a projectile from a thundermug.

Roger

The grooves don't have to be deep, also they should not be square cornered at the bottom.

GGaskill · « **Reply #36 on:** January 05, 2023, 04:19:12 PM »

It's been raining a lot here and it's easier to sit at the computer than to shiver in the shop. Latest incarnation of rook thunber mug:

http://www gunneyg.info/images/RookTwo.gif

GTS225 · « **Reply #37 on:** January 06, 2023, 02:05:42 AM »

Quote from: GGaskill on January 05, 2023, 04:19:12 PM

It's been raining a lot here and it's easier to sit at the computer than to shiver in the shop. Latest incarnation of rook thunber mug:

I can certainly understand that, GG. I don't get much old car stuff done during the winter for that reason.
The lathe and mini mill are in the basement, so I have that.
Looking great on the drawings! Proportions are about perfect.

Roger

Double D · « **Reply #38 on:** January 06, 2023, 02:17:22 AM »

George,

I am probably going to copy that , skipping the brick work and steps. Will do the Crenulated top how ever.

GGaskill · « **Reply #39 on:** January 06, 2023, 05:33:50 PM »

Be my guest. I can email the dimensioned drawing if you like.

Double D · « **Reply #40 on:** January 08, 2023, 01:33:55 PM »

Don't need dimensions George, will use the MiF method. But thanks!

GGaskill · « **Reply #41 on:** January 08, 2023, 03:21:31 PM »

The one shown has a 1" bore.

GTS225 · « **Reply #42 on:** February 28, 2023, 05:51:43 AM »

Quote from: Double D on November 25, 2022, 02:25:28 AM

If you are not in a big hurry and would be willing to meet me along 1-35 some where, Wife and I drive to Minnesota several times a year.

If you want this round, and are willing to meet me along I-35, its yours. I think after the first of the year the wife and I may be headed north to see the great Grandson.

Whenever you're ready, DD.

Roger

Double D · « **Reply #43 on:** March 01, 2023, 08:41:00 AM »

Sorry Roger but the March trip has been turned into a family spring break cruise and Universal Studios Tour. I have been able to finagle taking the Grandson fishing instead. Snook, Redfish and tarpon. Sacrifices you make for the Grands. He is 30 something and does tournament fishing with his dad in MN. He takes me fishing when I come up.

Double D · « **Reply #44 on:** April 28, 2023, 07:28:51 PM »

Roger, check your PM's

GTS225 · « **Reply #45 on:** April 29, 2023, 01:56:00 AM »

Quote from: Double D on April 28, 2023, 07:28:51 PM

Roger, check your PM's

Got it. Working out details, and will get back to you.

Roger

GTS225 · « **Reply #46 on:** April 29, 2023, 01:57:02 AM »

Quote from: GGaskill on January 05, 2023, 04:19:12 PM

It's been raining a lot here and it's easier to sit at the computer than to shiver in the shop. Latest incarnation of rook thunber mug:

http://www gunneyg.info/images/RookTwo.gif

Hey, GG. Got any pics of the finished piece yet?

Roger

GGaskill · « **Reply #47 on:** April 30, 2023, 11:17:57 AM »

Weather has improved here but I have not started on it yet. If you remember the Zulu thread, you will remember I am not all that expeditious about projects like this. : - )

GGaskill · « **Reply #48 on:** May 03, 2023, 03:44:11 PM »

Your reply #46 motivated me to start on this. I have faced off the bottom and turned the seat for the base, faced off the top to length and turned the OD of the battlement. I want to drill the bore in this setup but the drills are at my AZ shop, so progress has come to a halt. I'll bring the drills back around the 20th and get back to work then.

GTS225 · « **Reply #49 on:** May 04, 2023, 01:02:41 AM »

I've started on a small mug, but this'll be a bit more traditional in appearance. (Stock wasn't big enough for a castle-ated version.) Got the piece cleaned up and slightly under 3" O.D.. Got a 1" bore finished, but want a 3/4" or 7/8" powder chamber at the bottom to maintain minumum wall thickness. Not sure whether to go with a simple round bottom or something a little more elaborate.
Maybe a chamber more like a mortar?
My Harbor Freight "Silver & Demming" drills go to 1", and did a rather decent job on the bore for me. (Went to 7/8" and finished it with a boring bar.)
Still not set on an outer profile, but I'm sure I'll have to round up a chunk of flat stock to fashion a baseplate out of.

Roger

Double D · « **Reply #50 on:** May 04, 2023, 01:49:19 AM »

Go 1 inch all the way.

If you fill just the powder chamber the larger bore will work like and expansion chamber and you may get a reduction in sound.

GTS225 · « **Reply #51 on:** May 05, 2023, 02:55:33 AM »

Quote from: Double D on May 04, 2023, 01:49:19 AM

Go 1 inch all the way.

Wouldn't that violate the wall thickness/bore ratio? If I have a 1" bore in a 2.9" diameter steel round, then the wall thickness around the chamber is less than 1".

Quote from: Double D on May 04, 2023, 01:49:19 AM

If you fill just the powder chamber the larger bore will work like and expansion chamber and you may get a reduction in sound.

This I understand. Pressure reduction as a given pressure in a given dimension tube or chamber passes to a larger dimension tube or chamber. Learned this in a hydraulics class many moons ago.
(But it should blow bigger smoke rings!

)

BTW....did you get my email?

Roger

GGaskill · « **Reply #52 on:** May 05, 2023, 07:21:58 PM »

If I have a 1" bore in a 2.9" diameter steel round, then the wall thickness around the chamber is less than 1".

Should not really be a problem if you don't launch lead shot.

GTS225 · « **Reply #53 on:** May 06, 2023, 12:39:09 AM »

Quote from: GGaskill on May 05, 2023, 07:21:58 PM

If I have a 1" bore in a 2.9" diameter steel round, then the wall thickness around the chamber is less than 1".

Should not really be a problem if you don't launch lead shot.

True. And I have no intention of launching any projectile, but the mug will still exist after I'm gone.

Just sayin'.....Roger

GGaskill · « **Reply #54 on:** May 06, 2023, 12:50:57 PM »

... the mug will still exist after I'm gone.

True, but the .050" lack of metal will increase the wall stress by less than 400 psi (25400 vs 25000.) That would be lost in the uncertainties regarding the metal.

But it is your choice.

If you look at the dimensions of War Between the States artillery, their safety factor was less with weaker materials.

Double D · « **Reply #55 on:** May 07, 2023, 02:41:09 AM »

George is spot on. The difference is barely relevant. The sound difference will be noticeable.

Always consider how the future owner might use it, but there are limits to even that. You can't fix stupid.

If some one drives a tight fitting projectile in that short barrel no matter your efforts, I have doubts anything would happen.

If they drop a loose fitting projectile in and fire it they face the real risk when the projectiles comes down.

Your reduced chamber is not going to resolve-remove those "stupids".

Go for the straight chamber, you will be very much more satisfied. That's what we do keep future unknown use in mind.

GTS225 · « **Reply #56 on:** May 07, 2023, 05:49:02 AM »

Thanks, gents.
I'll square off the bottom of the hole, and stamp in warnings on the bottom of the finished mug. Something along the lines of NO PROJECTILE, and a maximum powder charge. Can't really expect too much out of someone else who might decide to play idiot.

And I do have to concede this very valid point; "If you look at the dimensions of War Between the States artillery, their safety factor was less with weaker materials."

Roger

Double D · « **Reply #57 on:** May 07, 2023, 07:30:31 AM »

Don't put a maxium charge, but do put Black powder only. Powder energy varies greatly from grain size to composition to manufacturer as well as change from time

GTS225 · « **Reply #58 on:** May 15, 2023, 03:49:12 AM »

Double D.....check your PM's.

Roger

Double D · « **Reply #59 on:** May 17, 2023, 04:28:43 AM »

Checked!

Tag, your it.

Check your PM's