Need help with 3D IJN Yamato Turret Mechanism

renogaza · 02-15-11, 08:59 PM

can someone help me acquire accurate and extremely detailed information
about the firing, loading, feedback and aiming mechanisms of the yamato's
guns?

i need to build a 90~100% accurate 3D cad/skp model of the yamato's
18.1in guns as an addition to my current project, i will accept any format.

i need info on how the barrel retracts from recoil, full barrel length, the
shock absorbers and hydraulics, the sealing method of the gun breach,
the gun breach door mechanism, breach door thickness, the bore length,
the bore type, fulcrum location, armor thickness, shell length to diameter,
size of cordite/"gun bag", no. of crew per turret, aiming mechanism,
aiming booth, fire control system, powerplant, shell delivery, cordite
delivery and lastly, turret exits

thank you for any and all the information you can offer

project details:

http://sketchup.google.com/3dwarehou...46&prevstart=0

or: http://www.mediafire.com/?tncl1z7wdnzf3yx

(pls download google sketchup 7 or 8 below to view the project):
http://sketchup.google.com/download/gsu.html

Sailor Steve · 02-15-11, 10:55 PM

WELCOME ABOARD!

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

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/

02-15-11, 08:59 PM	#1
renogaza Swabbie Join Date: Feb 2011 Location: makati city, manila, NCR luzon, Philippines Posts: 7 Downloads: 0 Uploads: 0	Need help with 3D IJN Yamato Turret Mechanism can someone help me acquire accurate and extremely detailed information about the firing, loading, feedback and aiming mechanisms of the yamato's guns? i need to build a 90~100% accurate 3D cad/skp model of the yamato's 18.1in guns as an addition to my current project, i will accept any format. i need info on how the barrel retracts from recoil, full barrel length, the shock absorbers and hydraulics, the sealing method of the gun breach, the gun breach door mechanism, breach door thickness, the bore length, the bore type, fulcrum location, armor thickness, shell length to diameter, size of cordite/"gun bag", no. of crew per turret, aiming mechanism, aiming booth, fire control system, powerplant, shell delivery, cordite delivery and lastly, turret exits thank you for any and all the information you can offer project details: http://sketchup.google.com/3dwarehou...46&prevstart=0 or: http://www.mediafire.com/?tncl1z7wdnzf3yx (pls download google sketchup 7 or 8 below to view the project): http://sketchup.google.com/download/gsu.html

02-15-11, 10:55 PM	#2
Sailor Steve Eternal Patrol Join Date: Nov 2002 Location: High in the mountains of Utah Posts: 50,369 Downloads: 745 Uploads: 249	WELCOME ABOARD! This should give you some of the information you require. http://www.navweaps.com/Weapons/WNJAP_18-45_t94.htm __________________ “Never do anything you can't take back.” —Rocky Russo

02-16-11, 08:45 PM	#4
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	#5
Sledgehammer427 PacWagon Join Date: Jun 2007 Location: Drinking coffee and staring at trees in Massachusetts Posts: 2,901 Downloads: 280 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, 02:17 AM	#6
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/