Author Topic: Pressure hull forward cap  (Read 326 times)

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Offline bianco64squalo

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Pressure hull forward cap
« on: 28 May , 2017, 23:26 »
Hi everybody, I'm working on forward section of U-552; I post a couple of photos of forward pressure hull cap, one of a real U-Boat and one of my model, not yet finished....I'd like to know, exactly, the devices and the shaft passing through all the holes visible on the cap, because I intend to scratchbuild all the connections from the cap to the respective devices....
Any help is welcome.
Thanks in advance.
Filippo

Offline bianco64squalo

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Re: Pressure hull forward cap
« Reply #1 on: 28 May , 2017, 23:36 »
Here another couple of photos.
Some question:
- was the U-Boat in the photo with red signs an U-Boat Type VIIC ?
- the red circled object was present in all U-Boat tubes ?
- were the ribs indicated in red present in all U-Boat tubes ?
Thanks in advance for help.
Filippo

Offline SG

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Re: Pressure hull forward cap
« Reply #2 on: 29 May , 2017, 02:22 »
Reply to question one: yes it's a type VII

Offline bianco64squalo

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Re: Pressure hull forward cap
« Reply #3 on: 29 May , 2017, 11:09 »
No one other help ?

Offline SnakeDoc

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    • Torpedo Vorhaltrechner Project
Re: Pressure hull forward cap
« Reply #4 on: 29 May , 2017, 13:03 »

Hi Filippo,

No one other help ?


You have asked the question 12 hours ago. I would suggest you more patience.


I'd like to know, exactly, the devices and the shaft passing through all the holes visible on the cap, because I intend to scratchbuild all the connections from the cap to the respective devices....


The description of the attached image:
1. shaft for anchor slipping hook
2. shafts for opening the muzzle doors
3. compressed air lines for launching naval mines
4. compressed air lines for operating the naval mines stop latch
5. pipes for draining the torpedo tubes
6. air lines for venting torpedo tubes


U-Boats not fitted with mines launching gear did not have 3) and 4)
However, U 552 could lay mines from her torpedo tubes (note in this KTB).


Here another couple of photos.
Some question:
- was the U-Boat in the photo with red signs an U-Boat Type VIIC ?


That's right, it is type VIIC U-Boat.


- the red circled object was present in all U-Boat tubes ?


I do not see any red circled object, you mean red rectangle? If so, this support was present between upper and lower pairs of tubes.


- were the ribs indicated in red present in all U-Boat tubes ?


Yes, the ribs were present in all U-Boat tubes.


--
Regards
Maciek


Offline bianco64squalo

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Re: Pressure hull forward cap
« Reply #5 on: 29 May , 2017, 13:51 »
Thanks Maciek, and sorry for my anxiety, but this is only a result of my U-Boat's enthusiasm and passion....unfortunately the informations I look for are not easily available on books and on internet, and so the passion is not sufficient for the purpose...so your support is so pretious for me, as experts of U-Boat as you are.,,,
Thanks again....I'll need your support again...
Cheers.
Filippo

Offline bianco64squalo

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Re: Pressure hull forward cap
« Reply #6 on: 30 May , 2017, 05:15 »
Hi Maciek,
I appreciate your Knowledge and competence in U-Boat's subject: can I ask you from where you got your konwledge? For example, how can you be sure to assign a specific utilization for all the forward pressure hull cap's holes ? I didn't mean that I put in doubt your statements, but only that I'd like to know where I have to search to obtain only a part of your competence...
In the scratchbuilding of 1/48 Trumpeter's U-552, I would have the possibility to try the replication of many and many particulars: what I miss is the necessary documentation....
Thanks for your attention, and mostly for your help...
Filippo

Offline SnakeDoc

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Re: Pressure hull forward cap
« Reply #7 on: 30 May , 2017, 05:41 »
Hi Filippo,


some time ago I was very interested in the way of operation of the German torpedo tubes.
Tubes used by US Navy were clearly described in the following document.


As you have noted, there is no similar document for German tubes. I researched this topic and created this article.
The best (however still scant) historical source on German torpedo tubes is British Report on HMS Graph together with plate illustrating the torpedo systems.


I was analyzing many photos of the torpedo tubes, gathering pieces of information from KTBs and interrogation reports, found one document related with tubes in British National Archives. All this put together gave a logical description and function of the torpedo tubes systems.




--
Regards
Maciek

Offline bianco64squalo

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Re: Pressure hull forward cap
« Reply #8 on: 31 May , 2017, 02:10 »
Thanks Maciek,
your article is fantastic: I already read and printed it...