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Re: Deck vent for Stern Driving Tank
Posted by:
Don Prince
()
Date: January 28, 2009 03:59AM
Hello SnakeDoc,
The U-boat manual:
M.Dv 381 U-Bootskunde f.U-Boot Bauart VIIC-1940 Geheim
Naval Service Manual 381 U-Boat training for submarine type VII C edition - 1940 Secret
My poor attempt at a translation....
Page 38:
Wasserdichtes Heck und Back.
Der vorderste und hinterste Teil des Außenschiffes ist zur Dämpfung der Stampfbewegung des Bootes als wasserdichte Back bzw. Heck ausgearbeitet. Beide haben Flutschlitze und werden durch je eine Entlüfungsklappe entlüftet.
Water-tight Stern and Bow.
The foremost and rear part of the external ship is for the absorption of the pitching of the boat as waterproof bow and/or stern prepared. Both have Flooding slots and the air is exhausted by an air vent valve.
Low pressure plate 12 has an air line to eack tank (stern and Bow).
[www.uboatarchive.net]
It looks like the tanks are flooded in rough seas for horizontal stability...
Page 39:
Trimzellen.
Je eine im Bug- und Heckraum liegende Trimmzelle die 41,6 m voneinander entfernt liegen, sind durch eine Trimmleitung mit Trimmwasserzähler über ein Trimmventil und Trimmschalter miteinander verbunden. Das Trimmen erfolgt mit Druckluft oder mit der Hi Lenz und Trimmpumpe.
Trim tanks.
One in the bow and stern trim area the cells are 41.6 m distance from each other, are linked by a trim pipe with a water trim valve and a trim pitch switch. The trimming is done with air or with the Auxiliary bilge and trim pump.
It looks like water is moved between the two trim tanks (internal) to longitudinally balance the U-boat.
[www.uboatarchive.net]
You were correct about water not being moved between the Stern and Bow Bouyancy tanks. Water is moved between the internal trim tanks to balance the U-boat.
Comments???
Kind regards,
Don_
"A man's got to know his limitations..."
Harry Callahan, SFPD
The U-boat manual:
M.Dv 381 U-Bootskunde f.U-Boot Bauart VIIC-1940 Geheim
Naval Service Manual 381 U-Boat training for submarine type VII C edition - 1940 Secret
My poor attempt at a translation....
Page 38:
Wasserdichtes Heck und Back.
Der vorderste und hinterste Teil des Außenschiffes ist zur Dämpfung der Stampfbewegung des Bootes als wasserdichte Back bzw. Heck ausgearbeitet. Beide haben Flutschlitze und werden durch je eine Entlüfungsklappe entlüftet.
Water-tight Stern and Bow.
The foremost and rear part of the external ship is for the absorption of the pitching of the boat as waterproof bow and/or stern prepared. Both have Flooding slots and the air is exhausted by an air vent valve.
Low pressure plate 12 has an air line to eack tank (stern and Bow).
[www.uboatarchive.net]
It looks like the tanks are flooded in rough seas for horizontal stability...
Page 39:
Trimzellen.
Je eine im Bug- und Heckraum liegende Trimmzelle die 41,6 m voneinander entfernt liegen, sind durch eine Trimmleitung mit Trimmwasserzähler über ein Trimmventil und Trimmschalter miteinander verbunden. Das Trimmen erfolgt mit Druckluft oder mit der Hi Lenz und Trimmpumpe.
Trim tanks.
One in the bow and stern trim area the cells are 41.6 m distance from each other, are linked by a trim pipe with a water trim valve and a trim pitch switch. The trimming is done with air or with the Auxiliary bilge and trim pump.
It looks like water is moved between the two trim tanks (internal) to longitudinally balance the U-boat.
[www.uboatarchive.net]
You were correct about water not being moved between the Stern and Bow Bouyancy tanks. Water is moved between the internal trim tanks to balance the U-boat.
Comments???
Kind regards,
Don_
"A man's got to know his limitations..."
Harry Callahan, SFPD
