Rear torpedo section VII / 3D model / 1/72

[SnakeDoc]

Hi Marko

here is the generator, i tried to match it to the one found on K

[SnakeDoc]

Hi Marko

im not sure if i understand you, could you please mark it on this render picture? should it be pivoted more towards the pressure hull?

I think, that Tore means, that emergency steering column can be set in to position: "stowed" (as on U-995) and "operational". See the following photos (U-505 and U-889 and U-190, although type IX boats, but the principle the same):

Oh, and if you have perhaps a photo of ceiling, i would be grateful, since i have to put something in there, now its so empty

Try this:
http://www.deutschland-panorama.de/museen/laboe_technisches_museum/ps/10_1051_02.php
http://www.kubische-panoramen.de/index.php?id_id=5375&p=i


--
Regards
Maciek

[SnakeDoc]

Hi Marko

Aha, thanks for pointing that out, well i pulled my bunch of drawings out again, and examined spare torpedo containers and loading hatches, and indeed as you said, rear torpedo hatch starts at the forward part of E-room, the component i have linked in the picture was rear torpedo container (again, you were right on that), so the panel in front of that one is actual loading compartment. I have rear spare torpedo container in resin from cmk, so i will use that one and will make loading hatch as a piece of E-room set.

That's right.


--
Regards
Maciek

[tore]

Hi Marko

im not sure if i understand you, could you please mark it on this render picture? should it be pivoted more towards the pressure hull?

I think, that Tore means, that emergency steering column can be set in to position: "stowed" (as on U-995) and "operational". See the following photos (U-505 and U-889 and U-190, although type IX boats, but the principle the same):

Oh, and if you have perhaps a photo of ceiling, i would be grateful, since i have to put something in there, now its so empty

Try this:
http://www.deutschland-panorama.de/museen/laboe_technisches_museum/ps/10_1051_02.php
http://www.kubische-panoramen.de/index.php?id_id=5375&p=i


--
Regards
Maciek

Rigth Maciek, interesting pictures you got.
Tore

[tore]

On a drawing, which is claimed to be copied from U 570, is an aft torpedoroom plan of an early VIIC where they show two E-compressors and a separat detail cut out showing a Junker compressor, could that indicate the the first VIICs had two E-compressors?. Anyhow the Junker compressor was a wonderful machine, totally balanced, it was however susceptible to carbon deposits on the dieselside which was upsetting the delicate balance and thus required a fairly frequent maintenace.
Tore

[NZSnowman]

Hi Simon

Here a nice close-up view of U-766 drive shaft 

Where did you find this cool picture?


--
Regards
Maciek

Sorry Maciek, I can not remember 

[SnakeDoc]

Hi Tore

On a drawing, which is claimed to be copied from U 570, is an aft torpedoroom plan of an early VIIC where they show two E-compressors and a separat detail cut out showing a Junker compressor, could that indicate the the first VIICs had two E-compressors?.

Interesting remark. I digged a little deeper and here are results:
The first boat equipped with the Junkers compressor was U-98. She was one of the first type VIIC boats ever. These were ordered as follows:

Yard No.	Boat No.	Ordered	Laid down	Launched	Commissioned
598	U-93	30.05.1938	09.09.1939	08.06.1940	30.07.1940
599	U-94	30.05.1938	09.09.1939	12.06.1940	10.08.1940
600	U-95	30.05.1938	16.09.1939	18.07.1940	31.08.1940
601	U-96	30.05.1938	16.09.1939	01.08.1940	14.09.1940
602	U-97	30.05.1938	27.09.1939	15.08.1940	28.09.1940
603	U-98	30.05.1938	27.09.1939	31.08.1940	12.10.1940
604	U-69	30.05.1938	11.11.1939	19.09.1940	02.11.1940
606	U-70	30.05.1938	19.12.1939	12.10.1940	23.11.1940

These orders were placed in the Germaniawerft AG in Kiel.


It looks like the first five type VIIC boats (U-93, U-94, U-95, U-96, U-97) where equipped with two electrically driven compressor, while all later with one electric and one diesel compressor. And that's why, on the plans from the U-570 there were drawn both versions of the equipment.
U-570 were ordered on 16.10.1939 in Blohm & Voss in Hamburg and laid down, launched and commissioned on 21.05.1940, 20.03.1941 and 15.05.1941 respectively. She was for sure equipped with the Junkers compressor (according to photos and reports).

Anyhow the Junker compressor was a wonderful machine, totally balanced, it was however susceptible to carbon deposits on the dieselside which was upsetting the delicate balance and thus required a fairly frequent maintenace.

I have got interesting quote from the book "Diesels for the First Stealth Weapon":

The author remembers his experience on a similar Junkers unit when a graduate student in 1954. One from a submarine and brought to America after 1945 was set up in Stanford University laboratory for experimental purposes. Not in the best of condition, it usually failed to start which meant cranking the pistons together again - and again. It was also extremaly noisy, and one can only imagine how it sounded inside a U-boat; the silence was deafening when it stopped. However, it was so finely balanced that a coin remained standing on edge while the engine was running. Thus fifty years later in Kiel it was a pleasure to hear one again albeit still as loud as remembered.

One of these compressors is shown in the Maschinenmuseum in Kiel-Wik, where it provides compressed air for starting the MWM RS 34 S engine (another submarine diesel).
http://www.youtube.com/watch?v=aH688UAAfUw&NR=1
http://www.youtube.com/watch?v=5eCq33orEaA&feature=related
http://www.youtube.com/watch?v=jg3iMp-7RcE&feature=related
http://www.youtube.com/watch?v=VhNbfunBLSs&feature=related


--
Regards
Maciek

[tore]

Junker compressor again.
In the navy workshop they actually once startet the compressor hanging in a wire and it was running withouth bouncing around. As you qoute Maciek it was very noisy, but so were the main diesels as well in the confined space. Ear protectors were unknowm in those days, no wonder my hearing is gone, but the Junker design was wonderful.
Tore

[Marko]

Erm, so if i am modeling the U-96, i should make 2 electrical compressors instead?

[SnakeDoc]

Erm, so if i am modeling the U-96, i should make 2 electrical compressors instead?

Well, I would do so.


--
Regards
Maciek

[tore]

Poor you Marko, but this is the result of good resarch as so many others have been doing before you and that is why this kind of work is interesting, no ready made desciption to follow and  each work becomes different and unique. Look at the enormous research and work of Simon during many years and Christophers challenging task! I`m very impressed by these guys and the tireless labours with foreverlasting alterations. Keep going you have an interesting project ahead of you.
Tore

[Marko]

He he, well im doing my best. We had another brief conversation today regarding printing, and at the moment machine needs few components replaced in order to gain accuracy, this will be done by summer, and then we will need test subjects anyways, so we decided that this could be ideal project.

back to the drawings, i've added a torpedo pulley, few smaller generators, or electric motors?, boxes, few locating pins for larger valve wheels, this compartment is detailed actually 70% with wiring and plumbing, so i wont be able to do much this ways, that will be added after print outs will be made, with copper, aluminum and lead wires, different diameters.

have i missed anything crucial perhaps? Did have this compartment any guiding rail for torpedo loading or was it handled pretty much by pulley? I have also made the torpedo loading hatch, but the actual hatch with its closing system will be taken from CMK's set, since i am unable to recreate it with this technology (would need photoetching)

[tore]

I`m not sure if you got the e-motor for the steeringgear in. It is a fairly large motor fitted atwarthship and connected to the geardrive where the rod from the emergency steering is entering. May be you recognize it on the posted picture.
Tore

[SnakeDoc]

Hi


I would also add the electric motor and steering gear for the aft diving planes and air fans for the main electric motors.


--
Regards
Maciek

[Marko]

well, i added the steering gear motor, at least i think i did, (cylinder 90