Technology and Operations  
This forum is for discussing technological & operational matters pertaining to U-boats. 

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1 year ago
Don Prince
Hello Brian, The new design Schnorchel was completed by the Norwegian's after WWII on U-995 (Kaura S 309). The new design Schnorchel has an exhaust pipe extending above the deck near the bridge/tower on the Starboard side. There was an intake bend that extended from the Schnorchel fulcrum and created a blister on the port side of the outer hull casing for the intake line. The origin Schno
Forum: General Discussions
1 year ago
Don Prince
Hello Raf, Where are these levers in question located? For example; U-570 had the older type lever switchboard and U-995 had the newer rotary type switchboard, or are you referring to levers located somewhere else in the e-room... Regards, Don_
Forum: Technology and Operations
1 year ago
Don Prince
Hi Ken, I don't see any real reason to encrypt the messages source because the transmissions is within sight and not broadcast. If they wanted encryption, then I would suggest the 4 rotor Enigma. I don't believe the US gave the Russians or the Chinese the US manufactured Bombe by the National Cash Register Company during the latter part of WWII. Regards, Don_
Forum: Technology and Operations
1 year ago
Don Prince
Hi Robert, On the Type VII U-Boat there was no source for steam heating onboard and that is because the water boiler heating source was at the harbor. The hookup was on the port or starboard side of the U-Boat near a small access door in the aft casing. The steam heating installation was fitted in the early wartime U-Boats and abandoned (1941) by the mid-years of the war. Regards, Don_
Forum: Technology and Operations
2 years ago
Don Prince
It is my sad duty to inform you all that I have lost a very dear friend; Maciek Florek (SnakeDoc) has passed away on August 2, 2017. Maciek was an expert on U-Boats and he often shared his knowledge with all of us. A friendship is forever... Kind regards, Don_
Forum: Technology and Operations
4 years ago
Don Prince
Hello Lamptester, And the rest of the story.... Regards, Don_
Forum: Movies and Films
4 years ago
Don Prince
Hello Moviedude, The Type VIIC U-Boat had 2 dual e-motors which could be run as generators to recharge the batteries. The e-motors ran the U-Boat while submerged, and a few times while surfaced (i.e., when reversing was removed from the diesel engines). One dual unit configured as parallel armatures / generators which charged the batteries configured in parallel for high amps, and in serial
Forum: Technology and Operations
5 years ago
Don Prince
I messed up the URL try this again....
Forum: General Discussions
5 years ago
Don Prince
Maciek is absolutely correct... The rudder control device in the sft torpedo roon is only a mechanical steering device. However, in the control room the rudder steering control device (BBC) is electrical only, and the 2 plane control devices (BBC) are electrical and there is a mechanical wheel. The steering control devices (BBC) in the tower and on the bridge are electrical only. I have pos
Forum: General Discussions
5 years ago
Don Prince
Type VII U-boat... Rudder Control Station 1. Control Room 2. Conning Tower 3. Bridge Dive Plane control Station 1. Control Room Reference... Regards, Don_
Forum: General Discussions
5 years ago
Don Prince
Hi John, That looks believable... There have been many documented instances where U-Boats have been rammed by warships or Merchant ships, or attempts were made to do so. I don't know of it happening the other way where the U-boat did the ramming. Regards, Don_
Forum: General Discussions
5 years ago
Don Prince
The interior photos of U-995 E-Maschine Control Panel have the rotary type devices and not the switch type. There would have been no reason to change out the new controls for the older type. Those look to be correct considering U-995 was commissioned 16 September 1943. Regards, Don_
Forum: Modeling and schematics
5 years ago
Don Prince
Wow... U-210 fate - Sunk 6 Aug, 1942 in the North Atlantic south of Cape Farewell, Greenland, in position 54.24N, 34.37W, by ramming, depth charges and gunfire from the Canadian destroyer HMCS Assiniboine. 6 dead and 37 survivors. The U-boat (type VIIC) was rammed, not the other way around! The sub bow in the photo is DEFINITELY NOT a type VIIC! Give it up, the whole article looks to be a
Forum: General Discussions
5 years ago
Don Prince
I wouldn't use a sub to ram a canoe, let alone a trawler... There is just too much that can go wrong with such a tactic. What if the trawler blew up and took out the entire bow section of the sub, or even possibly sank the sub? The captain had better hope she sinks, because he would face hell when he got back to home port for being an idiot! I believe Ken is correct; the sub bow looks
Forum: General Discussions
5 years ago
Don Prince
Possibly U-203, the physical structure looks about right... Regards, Don_
Forum: General Discussions
5 years ago
Don Prince
According to this web site 1156 U-boats were built and 761 were lost. During the war, 2779 ships were sunk (14.1 million Tons) by U-boats. The ratio is about 3.65 to 1. However, one has to understand that most of the losses (607) happened from 1943 through 1945, why was this? The US was providing aid to England from the very beginning of the war in 1939, but President Roosevelt made it
Forum: General Discussions
5 years ago
Don Prince
Kurt Baberg was not awarded the RK according to uboat.net own listing... I also checked Wikipedia and he is not listed there eighter Regards, Don_
Forum: General Discussions
5 years ago
Don Prince
Jon, On the Uboat.net main screen select "U-Boat Types," then select the IXC and the IXC/40 and you can see what was physically different. Type IXC Displacement: (tons) 1120 (sf) 1232 (sm) 1540 (total) Length: (m) 76,76 oa 58,75 ph Beam: (m) 6,76 oa 4,40 ph Draught: (draft) 4,70 m Height: 9
Forum: Modeling and schematics
5 years ago
Don Prince
I searched the internet "U-Boat VII max depth" and found this entry.... Regards, Don_ ****************************************************************************** There is a patch available on subsim.com to correct the depths. From that forum: Absolute Maximum Crush Depths (no U-boat should ever, ever, EVER be able to go beyond these depths without being crushed): Ty
Forum: Technology and Operations
5 years ago
Don Prince
Hi Mark, This was a link back in 2000.... Note U-175 was a Type IXC Regards, Don_ ******************************************************************************* RE: Max Depth Posted by: Rainer Bruns () Date: June 22, 2000 02:13AM On Jan.30,43 U-175 plunged to a depth of 310m after DC attack by a Catalina before surfacing without control at 12/08N 20/30W. After returning to Lori
Forum: Technology and Operations
5 years ago
Don Prince
Marcelo, There is an Official WWII German Maunal which was translated to English on the Uboatarchive web site that has all the info you are looking for in the General section... Go here... Regards, Don_
Forum: Technology and Operations
5 years ago
Don Prince
I assume you meant Type VII... Don_
Forum: Technology and Operations
5 years ago
Don Prince
Look at this article... Regards, Don_
Forum: Technology and Operations
6 years ago
Don Prince
I believe the Naval Visor cap construction has a cover which is removable; at least the reproduction cap that I have is so. There is a metal ring that was remove from the U-Boat commanders cap to allow the crushed look. Regards, Don_
Forum: Technology and Operations
7 years ago
Don Prince
Hello Jay, Be very cautious about purchasing medals with a history (providence) unless the medal came from a reputable dealer or a family member of the recipient. There are a huge number of fakes German medals, daggers, and etc., that are being sold as originals. You may want to go to one of the German medal collectors web sites and ask a member to upload photos of your medal to verify it�
Forum: General Discussions
7 years ago
Don Prince
Hi Tim, I did my U-96 tower floor to match the deck color... This document actually has photos of U-96, and it was authored by Mr. Dougie Martindale as well. Regards, Don_
Forum: Modeling and schematics
7 years ago
Don Prince
Hi Tim, I agree with you about the bow and stern tone matching the deck. That's how I did my version of U-96. FYI - In addition, I removed the top deck mounted net cutter, but I left the lower bow net cutter in place. I have read that the Germans would not have wasted the manpower or acetylene to cut off the lower net cutter teeth... Regards, Don
Forum: Modeling and schematics
7 years ago
Don Prince
Hi Tim, I used a dark gray which matches the lower part of the hull and saddle tanks for my build of U-96 with the deck and metal plates on the bow and stern. Mr. Dougie Martindale has written an excellent article and it is available on the internet which extensively covers U-Boat colors. Best of luck on your project... Regards, Don_
Forum: Modeling and schematics
8 years ago
Don Prince
Hi Mark, This link is to a book which describes the device as a plunger or stalk.... Regards, Don_
Forum: Technology and Operations
8 years ago
Don Prince
Mark, I believe this information is available on this web site at the following link... Regards, Don_
Forum: Technology and Operations
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