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TYPE VII / Re: VIIc U-404 1:34
« Last post by Morog on 11 Aug , 2017, 11:16 »



TYPE VII / Main compass housing on Conning tower
« Last post by David83 on 10 Aug , 2017, 12:31 »
Dear Experts

i am wondering is there any pictures existing how the mother compass in this forward housing on the conning tower looks like .
would be much interested to see it i dont found any pictures of this compass .

Thanks Uboot experts

br David
Don, we are just on the way to the high mountain theater raining and temperatures hoovering around 8 centigrade, open air theater for 6 hours and 3 hours driving. Indeed my wife deserves the effort, we actually married in 1953 when I still was the chief of U 995 KNM Kaura and got a week off for marrying. Reverting in a small week.
TYPE VII / Re: U Boot in Focus #14 out now
« Last post by falo on 08 Aug , 2017, 23:49 »
Hello Dougie,

again thanks for your helpful information.

I have ordered a copy of UiF'#14 today and will keep you updated about the U 481-article and U boat operations in the baltic sea during WWII.

Hello Mr. Tore and All,

Thank you for the quick response about re-supplying the lube oil and the fuel oil to a U-Boat Type VII C.

I have made changes to the following pages: 123, 151, 171, 178, and 243 (replaced a photo). I changed these pages with new 3D images from Simon who has done outstanding work! The latest version of Skizzenbuch has been uploaded to Dropbox...

Mr. Tore - Your wife has been with you for over 50 years, and she deserves your full attention! Keep focused on the most important relationship in your life, and the rest will fall into place...

Kind regards,
TYPE VII / Re: U Boot in Focus #14 out now
« Last post by dougie47 on 08 Aug , 2017, 15:09 »
Hello Falo,

Well spotted on the lack of containers. According to page 10 of my article "List Of U-Boat Modifications & Identification Features" the four containers (sometimes fewer) were a feature that were added in late 1944. I have been unable to provide a more precise time date than late 44. I reckon the UiF photos of U 481 in the summer and autumn of 1944 show the boat before any life containers were added to the foredeck.

One photo (probably from 1945) shows U 481 with one singular container on the foredeck. I presume that was added sometime in late 1944 or so.



I guess it would probably be easier to have a look at plate 14 and 9 simultaneously as plate 14 only indicate inlet and outlet of the fuelling and lubeoil supply. I have tried to combine the two on my image below. You`ll see that both  hose connections for fuelling inlet and lube oil supply are situated almost at the top of the pressurehull eg nearly at the center. Contrary to my memory the downpipe and strainer for the lubeoil supply is on the port side of the engine room front door whereas the fuelling pipe is on the starboard side going under the floorplates to the strainer before crossover to the distribution valvebox.
Hopefully the image is selfexplanatory.
TYPE VII / Re: Tores mailbox VIIC and VIIC/41 operation and technical details
« Last post by SG on 08 Aug , 2017, 05:21 »
I just read about Maciek, and am shocked and deeply sad. The Forum has lost a precious source of information, a most fine researcher, one of its cornerstones in fact. He seemed to know every single part of a Uboat, and he was always available to provide information, even the apparently unanswerable information, for the ones in need. A major blow to the Uboat enthusiasts worldwide and to my morale. But, as Don said, we'll catch up with him sooner or later and will have the most pleasant technical conversations about uboats in those vast oceans up there somewhere, i have still a lot of unanswered questions to ask.
Farewell Maciek, you will be greatly missed!


I am right now up in the mountain for a couple of days under slight pressure of my wife to  attend som Plays, thus limited access to my papers.
However the lube oil of the VIIC GW engines without lubeoil centrifuges are based on a so called dry sump principle which means each mainengine has generally its own separate system with system tank. Normally you don`t fill up the systemtanks directly by shore supply, you top up or fill the lubeoil storage tanks I or II (port &stb) and take a possible luboil supply to the system tanks from the storagetanks.  In case of need you can indeed use the aux luboil/fueltransferpump to distribute the oil internally.
You never take fresh luboil from ashore directly through the engines, always to the storage tanks through the course filters.
As to the lubeoil filling pipe, I  guess the external hose filling cap is slightly to the starboard almost on the top of the presurehull. The downpipe inside the pressurehull follows the starboard side of the fore enginroom bulkhead door and the coursefilter ( nuts and bolts) underneath the floorplate starboard side having a crossover to the valvestchest on the port side. So use Simons drawings as far as I remember they are correct. I`ll revert as soon as I can find my images.
Hello Mr. Tore,

I have a question for my own personal knowledge about resupplying fuel and lub oil to the U-Boat.
1. I assume they can use the resupplying port's pumping pressure, or use the U-Boats Aux lub oil pump to fill the lub oil tanks.
2. Do they press lub oil through the diesel engines, or do they fill the lub oil tanks by pressing clean lub oil through the diesel engine's normal supply lines?

Last question...  My U-570 Plate 9  (fuel oil) and Plate 14 (lub Oil) show the filling lines on the port side. However, the attached photos and Simon's drawings show the U-Boat accepting the resupply on the starboard side.  Are the plates wrong?

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