Author Topic: VIIC/41 - Schematices drawing  (Read 512087 times)

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Offline NZSnowman

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Re: VIIC/41 - Schematices drawing
« Reply #675 on: 11 Nov , 2010, 13:30 »
Does anyone know the dimensions of the pressure hull for the conning tower for a Type VII’s? I have 2950 mm for its length and I am after its width.

Thanks, Simon

Using measurements from the conning tower casing from a Type XXI (3540 x 2160 mm) I was able to scale down to a Type VIIC conning tower casing length of 2950 mm and got a width of 1845mm. Can confirm this?

When I compare this with what I previous estimated, it was only out by 5 mm (2950 x 1850 mm), if my figures are correct it look like the Type XXI conning tower casing is a scale up version of the Type VIIC conning tower casing.
« Last Edit: 11 Nov , 2010, 13:31 by NZSnowman »

Offline NZSnowman

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Re: VIIC/41 - Schematices drawing
« Reply #676 on: 12 Nov , 2010, 18:56 »

Fig. 1. The Galley hatch from the top.


Fig. 2. The Galley hatch in its open position.


Fig. 3. In this photograph from uboatarchive.net of U-249, you can see the Galley hatch also in it open position.

Offline Pat

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Re: VIIC/41 - Schematices drawing
« Reply #677 on: 12 Nov , 2010, 21:27 »
Simon, I may be looking at it wrong, but I think I've found a slight error on the galley hatch drawing (and the CT hatch drawing on another thread).

The dog at the lower edge of the hatch is in the open position, as it should be for the hatch to be open as drawn.  But when you look at the lever mechanism that releases the dog, it is at it's lowest extent, meeaning that the collar that moves the lever in and out to pivot the dog, is as close to the inner wheel as it can go.  If I understand the mechanics of that correctly, it should go the opposite direction.

In otherwords, for the dogs to be open, the collar that works the lever should be close to the inner surface of the hatch, and when it is close to the wheel is when the dogs should be closed.

A very minor difference in the drawing, but a huge difference in how the lever mechanism works.

Offline NZSnowman

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Re: VIIC/41 - Schematices drawing
« Reply #678 on: 12 Nov , 2010, 21:56 »
Hi Pat, you are right, about the position for the dog. I was too lazy to redraw the u-boat pressure hull for that drawing so I just copy and paste it from a drawing where the hatch was in its closed position. The hatch is in the closed position but without the u-boat pressure hull drawn in. 

Offline NZSnowman

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Re: VIIC/41 - Schematices drawing
« Reply #679 on: 13 Nov , 2010, 01:36 »
Does anyone have any pictures of the Schnorchel piston?

Offline NZSnowman

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Re: VIIC/41 - Schematices drawing
« Reply #680 on: 13 Nov , 2010, 17:16 »
Does anyone have Vom Original zum Modell, Uboottyp IXC or the 'Construction designs plans' for the Type IXC?

I have a very poor scan of Plan 7, I am after the measurements from

Offline NZSnowman

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Re: VIIC/41 - Schematices drawing
« Reply #681 on: 14 Nov , 2010, 15:22 »
Does anyone have Vom Original zum Modell, Uboottyp IXC or the 'Construction designs plans' for the Type IXC?

I have a very poor scan of Plan 7, I am after the measurements from

Offline SnakeDoc

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Re: VIIC/41 - Schematices drawing
« Reply #682 on: 15 Nov , 2010, 03:49 »
Hi Simon

Thanks for the link to U-534 photos ;)

Does anyone know the dimensions of the pressure hull for the conning tower for a Type VII

Offline NZSnowman

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Re: VIIC/41 - Schematices drawing
« Reply #683 on: 15 Nov , 2010, 11:48 »
Thank, Maciek.

One thing I have been wondering about for a long time is. As we know that the Type VIIC/41 had better steel for the pressure hull. Do you think they used it for the conning tower also, hence, it was only 18 mm?

I also noticed this about the Type XXI that the main part of the conning tower is ellipse and the aft/fore parts are arc of circles. Wouldn

Offline DB Andrus

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Re: VIIC/41 - Schematices drawing
« Reply #684 on: 15 Nov , 2010, 15:16 »
Does anyone have Vom Original zum Modell, Uboottyp IXC or the 'Construction designs plans' for the Type IXC?

I have a very poor scan of Plan 7, I am after the measurements from

Offline NZSnowman

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Re: VIIC/41 - Schematices drawing
« Reply #685 on: 15 Nov , 2010, 19:30 »
Thanks DB Andrus :) I will post my results of the Schnorchel system when I finish it. It

Offline DB Andrus

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Re: VIIC/41 - Schematices drawing
« Reply #686 on: 15 Nov , 2010, 22:00 »
Thanks DB Andrus :) I will post my results of the Schnorchel system when I finish it. It

Offline FoxbaT

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Re: VIIC/41 - Schematices drawing
« Reply #687 on: 17 Nov , 2010, 12:14 »
Simon, i have a question about the small holes on the conningtower; are these holes on your drawing 100% correct? and are they on both sides the same?

I mean these holes:






On the U995 they are different, but i think not correct?





Hope you can help me with this,

Karel
« Last Edit: 17 Nov , 2010, 12:20 by FoxbaT »

Offline NZSnowman

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Re: VIIC/41 - Schematices drawing
« Reply #688 on: 17 Nov , 2010, 12:56 »
The holes are in the correct locations, they are for the air inlets (see below), and on both side. I believe there no standard pattern for there holes. I choose this pattern as it

Offline FoxbaT

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Re: VIIC/41 - Schematices drawing
« Reply #689 on: 17 Nov , 2010, 13:23 »
Many thanks Simon!!  ;)




Karel