Search found 20 matches
- Fri Dec 30, 2016 5:54 am
- Forum: Naval Weapons
- Topic: Plunging fire
- Replies: 22
- Views: 29674
Re: Plunging fire
By "belt" I presume you are both talking about the 320mm portion of Bismarck's main belt: http://www.kbismarck.com/proteccion6.gif The majority of the belt was located above the waterline (3.0/1.8 meters as designed, but 2.6/2.2 meters in practice), with the reasoning that shells are more...
- Fri Dec 30, 2016 5:32 am
- Forum: Naval Weapons
- Topic: Tirpitz' Radar
- Replies: 60
- Views: 55283
Re: Tirpitz' Radar
Could a FuMO 26 have picked up a squadron of Lancasters at 150km? Most likely. We have a base line for Seetakt picking up aircraft from the Dec 1939 air raid against the Wilhelmshaven anchorage. Seetakt picked up the bombers at 113 km. At that time the power output for Seetakt was only 2 kilowatts ...
- Fri Dec 30, 2016 4:43 am
- Forum: Naval Weapons
- Topic: Modern AAA
- Replies: 5
- Views: 9877
Re: Modern AAA
Gentlemen, I wonder about modern AAA effectiveness and I'm looking about data to guesstimate it. In 'Naval Antiaircraft Guns& Gunnery', Norman friedman states that - A simple, optic director improves the effectiveness fo Bofors and Oerlikon by 50%. - Late-war fire control and radar improve the ...
- Thu Dec 29, 2016 3:41 pm
- Forum: Naval Weapons
- Topic: Tirpitz' Radar
- Replies: 60
- Views: 55283
Re: Tirpitz' Radar
but I didn't know that they made radar sets late in the war that actually outperformed the late war allied sets so comprehensively. ☺ Snip Fritz Trenkle was of the opinion that the FuMO26 sets on Tirpitz were actually FuMO34 sets with 125kw of power. I'm not so sure. For one thing the modulators fo...
- Thu Dec 29, 2016 3:40 pm
- Forum: Naval Weapons
- Topic: Tirpitz' Radar
- Replies: 60
- Views: 55283
Re: Tirpitz' Radar
but I didn't know that they made radar sets late in the war that actually outperformed the late war allied sets so comprehensively. ☺ Snip Fritz Trenkle was of the opinion that the FuMO26 sets on Tirpitz were actually FuMO34 sets with 125kw of power. I'm not so sure. For one thing the modulators fo...
- Wed Dec 28, 2016 4:59 pm
- Forum: Naval Weapons
- Topic: Modern AAA
- Replies: 5
- Views: 9877
Re: Modern AAA
Gentlemen, I wonder about modern AAA effectiveness and I'm looking about data to guesstimate it. In 'Naval Antiaircraft Guns& Gunnery', Norman friedman states that - A simple, optic director improves the effectiveness fo Bofors and Oerlikon by 50%. - Late-war fire control and radar improve the ...
- Wed Dec 28, 2016 7:47 am
- Forum: Naval Weapons
- Topic: Best and Worst Torpedo WW2
- Replies: 23
- Views: 17223
Re: Best and Worst Torpedo WW2
The Km had issues with their torpedoes early on as well. The German torpedoes during the Narvick campaign (British operation Wilfred, the invasion of Norway at Narvick to cut of German iron ore supplies in 1940) were very unsatisfactory. 1 Magnetic pistol was unreliable. 2 Mechanical pistol was unr...
- Thu Feb 14, 2013 8:27 pm
- Forum: Hypothetical Naval Scenarios
- Topic: Could the Type XXI U-boat have won the war?
- Replies: 64
- Views: 27287
Re: Could the Type XXI U-boat have won the war?
I might add to the discussion that if the Type XXI was operational in 1943 then its impact would not be confined to the Atlantic or Arctic convoy battles, though those would be the critical battle areas. It is likely that a number of these subs would be sent further afield, into the Indian Ocean an...
- Thu Feb 14, 2013 8:16 pm
- Forum: Hypothetical Naval Scenarios
- Topic: Could the Type XXI U-boat have won the war?
- Replies: 64
- Views: 27287
Re: Could the Type XXI U-boat have won the war?
Thanks Dave, A.O.Bauer a Historian of German Electronics (including WW2) has written a paper in which he argues that the Germans produced between 500 and 1000 microwave radars. He notes that bombing severely damaged the Hareous Vacuum Schmelze works cutting of the supply of permanent magnets materia...
- Wed Feb 13, 2013 8:24 pm
- Forum: Hypothetical Naval Scenarios
- Topic: Could the Type XXI U-boat have won the war?
- Replies: 64
- Views: 27287
Re: Could the Type XXI U-boat have won the war?
If the TypE XXI could have been advanced two years, by which we mean entering trials service in early 1943, being debugged by mid to late 1943 with a large wave of production line u-boats entering service at that time it is in my opinion that the Arctic routes to Murmansk as well as the US to UK Atl...
- Sun Jan 20, 2013 5:51 pm
- Forum: Naval Weapons
- Topic: Question about RPC firing while turning the ship
- Replies: 37
- Views: 19827
Re: Question about RPC firing while turning the ship
Yes indeed, the gyroscopes via pickoffs passed their signal to magnetic amplifiers which operated electro hydraulic valves to operate the gun elevation via hydraulics (and presumably yaw as well) and controlled variable speed electric drives to operate the traverse. The gun mount was fully power con...
- Sat Jan 19, 2013 8:22 pm
- Forum: Naval Weapons
- Topic: Question about RPC firing while turning the ship
- Replies: 37
- Views: 19827
Re: Question about RPC firing while turning the ship
The distinction between gyro stabilising a gun mount and RPC (Remote Power Control) must be made, they are distinct. For instance the 10.5cm FLAK gun mounts on German capital ships were tri-axially stabilised and articulated. The gun mount could not only traverse and elevate but the guns could yaw i...
- Sat Dec 17, 2011 8:56 am
- Forum: Bismarck General Discussion
- Topic: Impact of dead radar on Bismarck's defence against Sworfish
- Replies: 2
- Views: 2141
Impact of dead radar on Bismarck's defence against Sworfish
On occaision much has been written on the impact on the Battle of the Denmark Straights of Bismarcks radar/s being out of action due to shock damage from a short battle with HMS Suffolk. Prinz Eugen took the lead to provide forward coverage since it was Bismarcks forward radar that had failed thus l...
- Sat Dec 10, 2011 11:42 pm
- Forum: Naval Weapons
- Topic: Fire Control in WWI
- Replies: 3
- Views: 3199
Re: Fire Control in WWI
It's worth looking at Carl Joesph August Michalke of Chorlotenbrug Germany 1897 patent for the selsysn.
These were used to transmit bearings within German ships. US Paten 684 579 was received.
http://www.google.com/patents/about/684 ... 5lAAAAEBAJ
These were used to transmit bearings within German ships. US Paten 684 579 was received.
http://www.google.com/patents/about/684 ... 5lAAAAEBAJ
- Wed Nov 30, 2011 11:48 pm
- Forum: Naval Weapons
- Topic: World War II Japanese radar
- Replies: 47
- Views: 57197
Re: World War II Japanese radar
The article Japanese Radar development prior to 1945 by "Shigeru Nakajima" has photographs of the M312 magnetron used in the type 22. These were water cooled magnetrons in glass tubes. There are also photographs of all metal magnetrons developed in 1941 (not fielded due to metals shortages...