[Needed] British Deck Gun 4"/40 Marks IV, XII and XXII

keltos01 · 04-21-10, 12:34 AM

HMS Thunderbolt with 4"/40 (10.2 cm) Mark XII in 1941
Photograph copyrighted by John Lambert

First introduced on the rearmed scout cruiser Foresight in 1913, the Mark IV armed many destroyers and flotilla leaders of World War I. The Mark IV developed a reputation during World War I for repeatedly jamming. The Marks XII, XII* and XXII were an interchangeable series of guns based upon the Mark IV, but specially adapted for "wet mountings" on submarines. The first Mark XII was issued to submarine L33 in October 1919.

4"/40 (10.2 cm) on Submarine L33
Note how the entire gun platform rotated with the gun, thus ensuring adequate working space
Photograph from the collection of Dave Perkins and used here by his permission

The Mark IV was constructed of inner A tube, A tube, jacket and breech ring and was partly wire wound. This gun had a horizontal sliding breech block with semi-automatic operation. The Mark IV* had a strengthened breech ring, but this distinction was discontinued after a short time. Mark XII had a tapered inner A tube, A tube, wire for about half the length, jacket over more than half the length and a breech ring. The Mark XII* and Mark XXII had monobloc barrels and had a manually-operated horizontal sliding breech block. The Mark XII* had no muzzle bell and the breech ring was shaped while the Mark XXII had a muzzle bell and a rectangular breech ring.

http://www.navweaps.com/Weapons/WNBR_4-40_mk4.htm

4" submarine deck gun, probably for a T class submarine - Image Date:c.1939

http://www.dockmuseum.org.uk/archive/browser.asp?subject=&title=&subtitle=&searchtype=1 &deepcriteria=submarine+deck+gun+1939

4" Mk XII submarine gun in workshop - Image Date:1944 :

http://www.dockmuseum.org.uk/archive...riteria=mk+xii

keltos

keltos01 · 04-21-10, 05:16 AM

Peabody and I are making the new British guns that will be used by the Class T boat. The boat's tower has been modified accordingly, removing the turret.

keltos

keltos01 · 04-23-10, 11:00 AM

Uploaded with ImageShack.us

Uploaded with ImageShack.us

New British 4 inch DG done Thanks to Peabody. The Class T now has her rightful gun with armored turret !

also : while the game is lacking the .303 machine gun, Peabody implemented the .50 machine gun as AA gun, which is a lot closer to RL than a single 20 mm AA !

I modified the tower according to a RL picture, the original tub was too big.

keltos

04-21-10, 12:34 AM	#1
keltos01 Silent Hunter Join Date: Feb 2008 Location: Milan Italy Posts: 4,999 Downloads: 114 Uploads: 18	[Needed] British Deck Gun 4"/40 Marks IV, XII and XXII HMS Thunderbolt with 4"/40 (10.2 cm) Mark XII in 1941 Photograph copyrighted by John Lambert First introduced on the rearmed scout cruiser Foresight in 1913, the Mark IV armed many destroyers and flotilla leaders of World War I. The Mark IV developed a reputation during World War I for repeatedly jamming. The Marks XII, XII* and XXII were an interchangeable series of guns based upon the Mark IV, but specially adapted for "wet mountings" on submarines. The first Mark XII was issued to submarine L33 in October 1919. 4"/40 (10.2 cm) on Submarine L33 Note how the entire gun platform rotated with the gun, thus ensuring adequate working space Photograph from the collection of Dave Perkins and used here by his permission The Mark IV was constructed of inner A tube, A tube, jacket and breech ring and was partly wire wound. This gun had a horizontal sliding breech block with semi-automatic operation. The Mark IV* had a strengthened breech ring, but this distinction was discontinued after a short time. Mark XII had a tapered inner A tube, A tube, wire for about half the length, jacket over more than half the length and a breech ring. The Mark XII* and Mark XXII had monobloc barrels and had a manually-operated horizontal sliding breech block. The Mark XII* had no muzzle bell and the breech ring was shaped while the Mark XXII had a muzzle bell and a rectangular breech ring. http://www.navweaps.com/Weapons/WNBR_4-40_mk4.htm 4" submarine deck gun, probably for a T class submarine - Image Date:c.1939 http://www.dockmuseum.org.uk/archive/browser.asp?subject=&title=&subtitle=&searchtype=1 &deepcriteria=submarine+deck+gun+1939 4" Mk XII submarine gun in workshop - Image Date:1944 : http://www.dockmuseum.org.uk/archive...riteria=mk+xii keltos __________________ "Honorable Builder of Sinking Ships" Last edited by keltos01; 04-21-10 at 12:48 AM.

04-21-10, 05:16 AM	#2
keltos01 Silent Hunter Join Date: Feb 2008 Location: Milan Italy Posts: 4,999 Downloads: 114 Uploads: 18	Peabody and I are making the new British guns that will be used by the Class T boat. The boat's tower has been modified accordingly, removing the turret. keltos __________________ "Honorable Builder of Sinking Ships" Last edited by keltos01; 04-21-10 at 06:04 AM.

04-23-10, 11:00 AM	#3
keltos01 Silent Hunter Join Date: Feb 2008 Location: Milan Italy Posts: 4,999 Downloads: 114 Uploads: 18	Uploaded with ImageShack.us Uploaded with ImageShack.us New British 4 inch DG done Thanks to Peabody. The Class T now has her rightful gun with armored turret ! also : while the game is lacking the .303 machine gun, Peabody implemented the .50 machine gun as AA gun, which is a lot closer to RL than a single 20 mm AA ! I modified the tower according to a RL picture, the original tub was too big. keltos __________________ "Honorable Builder of Sinking Ships"