Search found 9 matches
- Sat Oct 01, 2011 7:28 am
- Forum: Naval Technology
- Topic: Armor Thickness – lbs and Inches
- Replies: 15
- Views: 51575
Re: Armor Thickness – lbs and Inches
The British after WWI decided to comply with the Washington Treaty absolutely. Thus, to prevent the ships from getting heavier than the maximums allowed, they specified NO PLUS tolerance in any steel thickness measures was allowed. As such was really impossible to achieve without drastic increases i...
- Mon Oct 26, 2009 10:30 am
- Forum: Naval Weapons
- Topic: 40 cm/45 Type 94 vs 16"/50 caliber Mark 7
- Replies: 17
- Views: 11536
Re: 40 cm/45 Type 94 vs 16"/50 caliber Mark 7
Note: The homogeneous armor penetration formulae/data set of M79APCALC is only partly mine. It is based on the major, long-duration work at the US Naval Proving Ground, Dahlgren, Virginia, during and after WWII by Dr. Allen V. Hershey and associates in the Ballistic Division. It is EXTREMELY accurat...
- Mon Oct 26, 2009 9:59 am
- Forum: Naval Weapons
- Topic: AP shells and sea water
- Replies: 22
- Views: 43390
Re: AP shells and sea water
I looked at the TOSA test results (position and size of holes in the hull, etc.) and the Japanese diagrams of underwater trajectories and, interestingly enough, the hit seems to have been a PERFECT example of a tumbling pointed shell, in that it made a hole in the hull in the form of a slot from a S...
- Mon Oct 26, 2009 8:53 am
- Forum: Naval Weapons
- Topic: Artillery shells dropped by planes
- Replies: 15
- Views: 28815
Re: Artillery shells dropped by planes
The Japanese bomb used at Pearl Harbor (and nowhere else, to my knowledge) was the 775 kg (1709 lb) 41cm (16.1" from the NAGATO and MUTSU guns) Type 99 (Year = 1939) Number 80 (Class Type, not sure of meaning) Mark 5 Bomb (that is, a bomb based on the British Mark 5 APC gun projectile, also use...
- Mon Oct 26, 2009 5:07 am
- Forum: Naval Weapons
- Topic: Range and Penetration Table for the 38 cm SK C/34
- Replies: 32
- Views: 11506
Re: Range and Penetration Table for the 38 cm SK C/34
This assumes KC n/A ("Krupp Cemented New Type" -- thick plate first used in SCHARNHORST) armor, with its 41% total face layer (59% unhardened back), straight-line hardness drop from the face behind the thin super-hard Cemented (carburized) layer to the back (most other face-hardened KC-typ...
- Mon Oct 26, 2009 4:27 am
- Forum: Naval Weapons
- Topic: Danger space, hitting space
- Replies: 18
- Views: 45150
Re: Danger space, hitting space
"Danger space" is the hull that can be hit at and above the waterline (upper hull side from the waterline up and the weather deck), though a downward-moving shell can hit the below-deck area sometimes, particularly at a high angle of fall. This puts reserve buoyancy and engine/boiler rooms...
- Mon Oct 26, 2009 2:18 am
- Forum: Naval Weapons
- Topic: Range and Penetration Table for the 38 cm SK C/34
- Replies: 32
- Views: 11506
Re: Range and Penetration Table for the 38 cm SK C/34
Hit on HOOD: The shell could penetrate the rather thin layers of spaced armor directly into the aft magazine if the fuze delay was long enough (the German base fuze of the time for its 38cm APC projectile was 0.035-second nominal average delay, giving it a distance of about 53 feet at 1500 ft/sec av...
- Mon Oct 26, 2009 1:49 am
- Forum: Naval Weapons
- Topic: MK-23 16 In. Naval Shell (Most Powerful Naval Shell Ever)
- Replies: 16
- Views: 51676
Re: MK-23 16 In. Naval Shell (Most Powerful Naval Shell Ever)
From the look of it, the shell is based on the outer shape and weight of the standard 1900-lb 16" High Capacity (HC) Projectile Mark 13 (pre-VT) or 14 (VT-capable with the nose fuze adaptor altered to allow the addition of a thin metal cover over the fuze for electromagnetic shielding during st...
- Mon Oct 26, 2009 1:17 am
- Forum: Naval Weapons
- Topic: Armor on USN Mk45 5" gun
- Replies: 4
- Views: 2292
Re: Armor on USN Mk45 5" gun
No armor. Just thin steel weather shield. Some other parts of these ships may have had kevlar, etc. added for some protection, but other than aircraft carriers, which have some light armor designed as such in specific spots, no current US Navy warship has anything that would be classified as "a...