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  #71  
Old 09-16-2020, 09:30 PM
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jimbean jimbean is offline
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hi all,
Some small progress, both cannons and the gratings.
Next is the structure that supports the roof.
cheers Jim
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USS Monitor 1:100-dscf2075.jpg   USS Monitor 1:100-dscf2076.jpg   USS Monitor 1:100-dscf2077.jpg  
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  #72  
Old 09-17-2020, 05:49 PM
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Michael Mash Michael Mash is offline
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Nice work with the guns Jim.
It looks like they were designed to slide forward and backward on tracks.
What was the purpose for that?
Mike

Last edited by Michael Mash; 09-17-2020 at 06:00 PM.
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  #73  
Old 09-17-2020, 08:27 PM
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thanks Mike,
Although they are monster guns, 11 in bore, they are not breach loaders
so have to be retracted into the turret to be loaded. The odd thing is that no
mechanism is shown to control the recoil.

I assume that it is just omitted on the model.
BTW the left one is a little crooked. I have to fix that.

cheers Jim
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  #74  
Old 09-18-2020, 01:43 AM
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Kevin WS Kevin WS is offline
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Nice build of the guns Jim.

See you picked up on the recoil question!

The design of the Dalhgren guns was actually quite advanced, the recoil being controlled by a built-in friction mechanism. This was adjusted by use of wheels to reduce or increase the friction. The wheels are shown on the model on the sides of the gun carriages just in front of the trunnions (see picture below). The system was very effective.

The use of the friction mechanism also provides the reason for the iron rail mounts - as opposed to one of the the more "normal" type of mountings used.

When the initial test firing was talking place, the wheel was were turned the wrong way, loosening the friction. The guns when fired then hit the back of the turret on recoil, leaving two dents on the turret wall that stayed with the ship!

So don't forget to model these if you want to be 100% accurate!!!!

P.S. Historians believe this was the first ever example of a revolving turret on a ship.
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Last edited by Kevin WS; 09-18-2020 at 02:11 AM.
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  #75  
Old 09-19-2020, 02:46 PM
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Thanks Kevin and for the information on the recoil mechanism.
I actually went hunting before reading your post and found only
one picture of a gun with a visible recoil and it was a rope.
Probably a test with the rope as a backup.
BTW I previously said that the roof support was next. Actually
this is the turret suspension, IE it hangs from the central pillar.
cheers Jim
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  #76  
Old 09-24-2020, 11:02 PM
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jimbean jimbean is offline
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The inner turret surface and the suspension structure.
There is a chicken/egg situation here.
Do you build the cannon and they try to make it poke out of the turret opening
or put the turret skin on and build the cannon to fit the opening.
Builders choice.
cheers Jim
Attached Thumbnails
USS Monitor 1:100-dscf2078.jpg   USS Monitor 1:100-dscf2079.jpg   USS Monitor 1:100-dscf2080.jpg   USS Monitor 1:100-dscf2081.jpg   USS Monitor 1:100-dscf2082.jpg  

USS Monitor 1:100-dscf2083.jpg  
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  #77  
Old 09-25-2020, 02:37 AM
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Butelczynski Butelczynski is offline
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Suspension structure-that's for the winch for bringing cannon charges from below thru now grated floor openings?Was powder magazine directly below turret?

I thought roof supports would be reinforced to have pulley system anchor for just that.

That's very fine work.Thank you again.
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