Tores mailbox VIIC and VIIC/41 operation and technical details

[tore]

Simon.
Further to my previous post I show below my basis for the assumption of the pipearrangement for the transition piece and main drain.
Tore

[NZSnowman]

Tore, a few more pipes and tweaking of alignments

[tore]

Simon.
Slowly but steady approaching the complete arrangement.   I noticed the  frames at the group exhaustvalve hull outlet have a larger distance to accommodate a large flange and that the hullpassage is a bit different from what assumed. I shall try to figure out further details. Below I have tried to indicate the coolingwater pipes.
Tore

[NZSnowman]

Simon.
Slowly but steady approaching the complete arrangement.   I noticed the  frames at the group exhaustvalve hull outlet have a larger distance to accommodate a large flange and that the hullpassage is a bit different from what assumed. I shall try to figure out further details. Below I have tried to indicate the coolingwater pipes.
Tore

Tore, I can not understand the two new pipes you have added to my drawing

Are you jointing the new Main cooling water outlet exhaust manifold  pipe to a exiting pipe (Red; This pipe is between the transfer flange and manifold)?

[NZSnowman]

A small update today.

[tore]

Simon.
I am the first to admit it is not easy to sort out these pipes.   I have made a drawing trying to explain my assumption below. The drawing shows the port engine in order to make it easier to check with the u historia photo.
I guess it is bit easier when you add the larger flange of the transition piece towards the group exhaustvalve housing ( red dotted oval). The largest red circles indicate the pressurehull flange for the hull outlet on top of the group exhaustvalve.
From the exhaust manifold main cooling waterbend out  you have a branch off (1) purple pipe going to the inlet at the bottom of the transition piece( 2). Out of the transition piece at the top (3.) From (3 )green pipe goes to the bottom of the endpiece( 4) and out at the top (5). The pipe now light blue goes down to the pipe between the main coolingwater valve and the main overboard valve.
Tore

[tore]

Simon.
Further to my above post. To have a better understanding, remember the basic for coolingwater flow : inlet at the bottom and outlet at the top. On the photo below I have indicated the branch off from main coolingwater pipebend to inlet transition piece ( purple pipe).
Tore

[NZSnowman]

Tore, thanks for the photo & drawings.

How does this look?

[tore]

Simon.
This make sense to me!   How about adding the other flange of the transitionpiece?
Tore

[tore]

Simon.
Transition piece.
Just indicating the two flanges of the transition piece which I guess is necessary to locate the coolingwater outlet.
Tore

[NZSnowman]

I feel that because of the shape of the group exhaust valve casting you would see the other flange. From the photo, you can see that the nuts are under and inward of the casting.

[tore]

Simon.
I see. You know for sure much more about this than I do.
Tore

[tore]

Simon.
The group exhaust valve finishing touch.
Below is my assumption of the hullpassage for the group exhaustvalve. No doubt the outlet is flanged to the inner pressurehull and nuts are locked by lockingplates,see photo below. The only place the pipebend can bypass the external exhaust pipeflange is outboard as indicated on the sketch. For the crossing of the next next flange ( mufflervalve,) the bend leaves the exhaustpipe on the top and goes to the bottom inboard of the mufflevalve housing. Further in the same way for the other flanges.
Tore

[NZSnowman]

[NZSnowman]

Tore, the drain line with the sight glass. Are we missing it or is it not on U-995?

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