Tores mailbox VIIC and VIIC/41 operation and technical details

[TopherVIIC]

Wonderful find Simon! You have  a good eye!

[NZSnowman]

Sorry, just more pipes

Tore, added the new exhaust to crossover pipe.

Tore, I just noted that the pipe colour code for the cooling water to the E Room/Torpedo Room is worng, it should be Green-Yellow-Green not Green-Violet-Green.

[NZSnowman]

Tore, where is the yellow line in real life? Does it run on top to the engine?


I was able to find the orange line

[NZSnowman]

A small remark as to the cover of the luboil filter. You have generously fitted the cover of the casing with 16 bolts, I guess 8 would do. I believe the casing would be tested with some 6 bar and the relief valve would open at 4, so remember the poor maintenance fellows.

 

[NZSnowman]

Tore, here today update.

I also was able to corrected the openings into the OL Tanks.

[tore]

Simon.
3 bar luboil supply to servo.
A good question. I would have thought the supplypipe runs below the floorplating inboard. However if you see the pipeconnection on the servo it looks as if the pipe enters the servo from outboard. I have not been able to trace the pipe along the engine for sure. May be you have more pictures to check.
Tore

[tore]

Simon.
Orange luboilpipe.
Yes this is the pump bypassline with shut of valve.  The other end should connect to the 3 bar servo supply which seems to go  inboard as I thought, but it still does not match the connection to the servo coming from outboard.
Tore

[tore]

Simon.
Your last updated drawing.
Now you are entering into the small pipe stuff where the sky is the limit,   the manometer pipes are OK.
Tore

[NZSnowman]

Simon.
Your last updated drawing.
Now you are entering into the small pipe stuff where the sky is the limit,   the manometer pipes are OK.
Tore

Thinking about adding the spider webs next 

[tore]

Watch out  don`t get caught in the web.
Tore

[tore]

Simon.
3 bar luboil supply servo.
I am happy you found the supply pipe going on the outboard side of the engine. Your suggested revised systemsketch is of course according to you find. I have below indicated how I guess the details of the servo might be. After the branch off to the Roots blower bearings, I guess they enter on both sides, the supply pipe enter the servo as shown on the drawing. The two drainpipes runs from the servo separately ( not to have any pressure interference) and join further the maindrain from the blower before entering the systemtank valvechest and into the tank.The oil from the servo is not contaminated so I don`t believe it enters the dirty oil tank.
Tore

[NZSnowman]

• Added the missing Engine lubricating oil inlet pipe to the manifold.

[tore]

Simon
The maintance staff would thank you for the new luboil filtercover and are happy you have some 75 cm between the floorplate and gatevalve of the coolingwater crossoverpipe under the valvechest.
Tore

[NZSnowman]

Tore, are the blue highlighted areas the sea water cooling pipes within the exhaust?

[NZSnowman]

Tore, I noted that on U-995 and the shipyard drawings there is a release valve for the cooling water at the end of the exhaust pipe. However, it not marked on the Design and Specification Book, plate 13. Do you think the release valve was added to the system sometime after 1940?

http://www.uboatarchive.net/U-570Plate13.htm