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Author Topic: Couldn't leave it alone  (Read 658 times)

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Offline Eyes Of Death

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Couldn't leave it alone
« on: January 24, 2008, 08:59:12 AM »
Couldn't leave it alone I had to add a elevation screw like the Dahlgren cannons that wear in garrison carriages.

out of the lathe with rounded edges starting to mill flat

clean up pass

finished!

Pre and post heating after welding.
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Offline seacoastartillery

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Re: Couldn't leave it alone
« Reply #1 on: January 24, 2008, 12:20:15 PM »
     What's the thread form, diameter and pitch of your elevation screw going to be?  Can you buy this or will you make it?
Looks like a very interesting gun!

Regards,

Tracy and Mike
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Smokin' my pipe on the mountings, sniffin' the mornin'-cool,
I walks in my old brown gaiters along o' my old brown mule,
With seventy gunners be'ind me, an' never a beggar forgets
It's only the pick of the Army that handles the dear little pets - 'Tss! 'Tss!

From the poem  Screw-Guns  by Rudyard Kipling

Offline Eyes Of Death

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Re: Couldn't leave it alone
« Reply #2 on: January 24, 2008, 04:30:51 PM »
I haven't given it much thought on a production run. Will stay with some thing standard as far as thread pitch most likely 3/4 acme at 6tpi. Hard to find taps fore acme in other than standard form. No plans just playing it by ear what looks good is good. Hears to nights project the pivot pin still needs to be milled flat like the other one and taped. Had help to night it slowed me down.

In the picture is a Parrott with the same modification.

The helper.
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Offline seacoastartillery

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Re: Couldn't leave it alone
« Reply #3 on: January 24, 2008, 09:16:38 PM »
     3/4" Dia. acme threads sound great; super strong and they work smoothly.  We can't wait to see these parts put together and functioning.  That's an interesting historical photo you picked to show the elevation screw.  The elevation screw, handle, collar and bottom yoke shown in your 1863 photo of Battery Rosecrans in the "parallels" on Morris Island, picturing Federal Siege operations in  Charleston's outer harbor are all per spec. on the copy of the 1862 drawing we have of this carriage.  At some time, a while before this photo was taken by Haas & Peale, this was a three gun battery with all three 100 Pdr. Parrott Rifles trained on Fort Sumter.  One big rifle, to the right of these two shown, blew up, shattered clear up to and beyond the trunnions, probably due to the explosion of a faulty shell.  This is a rare photo in that it shows Gen. Quincy Gilmore's seacoast gun crews in a "working" battery with all the mess that war always produces.

Lookin' good!

Mike and Tracy
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Smokin' my pipe on the mountings, sniffin' the mornin'-cool,
I walks in my old brown gaiters along o' my old brown mule,
With seventy gunners be'ind me, an' never a beggar forgets
It's only the pick of the Army that handles the dear little pets - 'Tss! 'Tss!

From the poem  Screw-Guns  by Rudyard Kipling

Offline Eyes Of Death

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Re: Couldn't leave it alone
« Reply #4 on: February 10, 2008, 03:13:57 PM »
I finished up the elevation screw now is redy fore paint.

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