Need help with 3D IJN Yamato Turret Mechanism

renogaza · 02-16-11, 01:57 AM

Quote:

Originally Posted by Sailor Steve

WELCOME ABOARD!

This should give you some of the information you require.
http://www.navweaps.com/Weapons/WNJAP_18-45_t94.htm

thank you steve, i'm not sure if this is just what i needed
(because theirs quite a bit to read xD), your contribution
is much appreciated

photographs of other details would be good, as well as
detailed diagrams, thank you for any and all information
you can offer

Chad · 02-16-11, 08:45 PM

It looks like you're creating a VERY HIGH resolution model of the Yamato. Very impressive

Sledgehammer427 · 02-17-11, 03:51 AM

Renogaza from the looks of it the Japanese used a similar system as the US.

(Going from memory here, might be a little rusty)
The fulcrum point was just before the cutouts in the turret face.
The breech mechanism was probably an interrupted screw system

here's a picture of a US 16 inch gun turret, should be relatively close to the system the japanese used.

now, as for aiming.

on a good day the turret recieved information from the director on the foretop. This used radar to get precise range information and had a stereoscopic system as backup.
If the turret stopped receiving information from the fire control computer the turret would switch to local control. This was entirely stereoscopic, and thats why there are "wings" on the back part of the turret, this houses the lenses for the rangefinder withing the turret.
I had the good fortune to be inside the turret of a battleship at the last SUBSIM meet. I believe there are some pictures we got of the interior.

renogaza · 02-21-11, 02:17 AM

i found a person who designed a sratch built 1/100th scale model of the
guns i'm working on, can you compare if the design works/is valid and
can compete against the iowa guns?

heres the url:
http://www.modelshipgallery.com/gall.../jd-index.html

i'm just about done making the gun, counterweight and breach hatch,
i'll do the final finish on it later, now i need to do the gun chamber and
fulcrum-pivot point.. still trying to figure out the shell and powder bags
lifts and the storage rooms.

heres a couple of pics of the unfinished product:

http://img835.imageshack.us/f/yammy10.jpg/

http://img29.imageshack.us/i/yammy20.jpg/

http://img4.imageshack.us/i/yammy30.jpg/

http://img403.imageshack.us/i/yammysectioncut.jpg/

Gerald · 02-21-11, 02:19 AM

Sledgehammer427 · 02-21-11, 03:08 AM

That looks about as good as you can get it.

The model is spot on, But with no real reference pictures, you can only speculate.

I'd say your 3d model is very accurate.

Keep up the good work!

Subnuts · 02-21-11, 12:06 PM

The "Anatomy of the Ship" book on Yamato has a great number of schematics of one of the 18-inch turrets, but I don't have a scanner up and running at the moment. Maybe I could coax my camera into getting a few good shots...

In the meantime, here's a cross-section through the No. 3 turret I scanned a while back: http://www.flickr.com/photos/2741763...7623949245645/

02-16-11, 08:45 PM	#2
Chad ACE Join Date: Sep 2002 Location: Kansas City Posts: 1,274 Downloads: 60 Uploads: 0	It looks like you're creating a VERY HIGH resolution model of the Yamato. Very impressive __________________

02-17-11, 03:51 AM	#3
Sledgehammer427 Ocean Warrior Join Date: Jun 2007 Location: Drinking coffee and staring at trees in Massachusetts Posts: 2,908 Downloads: 287 Uploads: 0	Renogaza from the looks of it the Japanese used a similar system as the US. (Going from memory here, might be a little rusty) The fulcrum point was just before the cutouts in the turret face. The breech mechanism was probably an interrupted screw system here's a picture of a US 16 inch gun turret, should be relatively close to the system the japanese used. now, as for aiming. on a good day the turret recieved information from the director on the foretop. This used radar to get precise range information and had a stereoscopic system as backup. If the turret stopped receiving information from the fire control computer the turret would switch to local control. This was entirely stereoscopic, and thats why there are "wings" on the back part of the turret, this houses the lenses for the rangefinder withing the turret. I had the good fortune to be inside the turret of a battleship at the last SUBSIM meet. I believe there are some pictures we got of the interior. __________________ Cold Waters Voice Crew - Fire Control Officer Cmdr O. Myers - C/O USS Nautilus (SS-168) 114,000 tons sunk - 4 Spec Ops completed V-boat Nutcase - Need supplies? Japanese garrison on a small island in the way? Just give us a call! D4C!

02-21-11, 02:19 AM	#5
Gerald SUBSIM Newsman Join Date: May 2008 Location: Close to sea Posts: 24,254 Downloads: 553 Uploads: 0	Welcome Aboard! __________________ Nothing in life is to be feard,it is only to be understood. Marie Curie

02-21-11, 03:08 AM	#6
Sledgehammer427 Ocean Warrior Join Date: Jun 2007 Location: Drinking coffee and staring at trees in Massachusetts Posts: 2,908 Downloads: 287 Uploads: 0	That looks about as good as you can get it. The model is spot on, But with no real reference pictures, you can only speculate. I'd say your 3d model is very accurate. Keep up the good work! __________________ Cold Waters Voice Crew - Fire Control Officer Cmdr O. Myers - C/O USS Nautilus (SS-168) 114,000 tons sunk - 4 Spec Ops completed V-boat Nutcase - Need supplies? Japanese garrison on a small island in the way? Just give us a call! D4C!

02-21-11, 12:06 PM	#7
Subnuts The Old Man Join Date: Feb 2005 Location: Connecticut Posts: 1,658 Downloads: 14 Uploads: 0	The "Anatomy of the Ship" book on Yamato has a great number of schematics of one of the 18-inch turrets, but I don't have a scanner up and running at the moment. Maybe I could coax my camera into getting a few good shots... In the meantime, here's a cross-section through the No. 3 turret I scanned a while back: http://www.flickr.com/photos/2741763...7623949245645/ __________________ My Amazon.com reviews

02-21-11, 02:17 AM	#4
renogaza Swabbie Join Date: Feb 2011 Location: makati city, manila, NCR luzon, Philippines Posts: 7 Downloads: 0 Uploads: 0	i found a person who designed a sratch built 1/100th scale model of the guns i'm working on, can you compare if the design works/is valid and can compete against the iowa guns? heres the url: http://www.modelshipgallery.com/gall.../jd-index.html i'm just about done making the gun, counterweight and breach hatch, i'll do the final finish on it later, now i need to do the gun chamber and fulcrum-pivot point.. still trying to figure out the shell and powder bags lifts and the storage rooms. heres a couple of pics of the unfinished product: http://img835.imageshack.us/f/yammy10.jpg/ http://img29.imageshack.us/i/yammy20.jpg/ http://img4.imageshack.us/i/yammy30.jpg/ http://img403.imageshack.us/i/yammysectioncut.jpg/