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08-17-16, 04:23 PM | #16 |
Dipped Squirrel Operative
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The levers at the top of the control room, are for a fast opening of the upper tank valves = rapid flooding. No time to turn a wheel, just pull those levers and tear open the upper flooding valves for a crash dive.
The VIIC boats had 5 ballast tanks. They were located inside and outside of the pressure hull. The tanks located in the saddles have two parts: port and starboard! The yare therefore doubly listed in the table below. According to the plans for type VIIc boats (from the Admiralty Technical Report on U-570), order of description: Tank number Between Frames Capacity (tons sea water) Fitted with No. 1 (single) Main Ballast tank (rear end of the boat) -10 to 0, external, aft of pressure hull above aft torpedo tube 31 Hand-worked vent, direct blow, exhaust blow - no Kingston valve, the bottom is open to the sea No. 2 (double) Main Ballast and Reserve Fuel Oil tank 17-34, external, in saddle tank 11.4 Two kingston operating positions working four kingstons, one T-wrench operated emergency vent valve leading into a duct to a common quick-opening lever-operated vent for No. 2 port and No. 4 port fuel tanks, one after-end auxiliary vent leading into a duct to a common auxiliary vent for port and starboard tanks, direct blow, exhaust blow, compensating and blow-out connections. Saddle tank fuel tanks are tested to only 15 lbs./sq. in. No. 2 Main Ballast and Reserve Fuel Oil tank 17-34, external, in saddle tank 11.4 As for No. 2 port, one T-wrench operated emergency vent valve leading into a duct to a common quick-opening lever-operated vent for No. 2 starboard and No. 4 starboard fuel tanks, one after-end auxiliary vent leading into a duct to a common auxiliary vent for port and starboard tanks. No. 3 (single) Main Ballast. tank, internal 40-49, internal, below control room 47.75* Four operating positions working six kingstons, direct blows, exhaust blows, two T-wrench operated emergency vent valves to port and starboard at the pressure hull to a duct which leads through the No. 2 Regulating tank at the end of which are two quick-opening lever-operated vents to the sea - tank tested to full diving depth so Kingstons could remain open at depth. No. 4 (double) Main Ballast and Reserve Fuel Oil tank 45 1/2-62, external, in saddle tank 13.5 Two operating positions working four kingstons, one T-wrench operated emergency vent valve leading into a duct to a common quick-opening lever-operated vent for No. 2 port and No. 4 port fuel tanks, direct blow, exhaust blow, compensating and blow-out connections. No. 4 Main Ballast and Reserve Fuel Oil tank 45 1/2-62, external, in saddle tank 13.5 As for No. 4 port, one emergency T-wrench operated vent valve leading into a duct to a common quick-opening lever-operated vent for No. 2 starboard and No. 4 starboard fuel tanks. No. 5 (single) Main Ballast tank (at the bow of the boat) 80-106, external, forward of pressure hull surrounding forward torpedo tubes 25.3 One hand worked vent, direct blow, exhaust blow - there is no Kingston valve in this tank the bottom is open to the sea Apart from those 5 'variable' flooding tanks, there were 'fixed' tight buoyancy tanks, 'variable' trimming tanks, fuel tanks being open to the sea at the bottom (Diesel swims on water) and fuel tanks being used for trimming - either by flooding them with seawater after being spent, or to be pumped around for trimming purposes. I guess it is easy if you look at one system at a time Generally the ballast tanks were blown out by compressed air stored in pressure bottles, not pumped out. Or, after surfacing or using a "Schnorchel" they could be fully blown out by the Diesels, having the advantage of the fatty exhaust fumes protecting the inner tanks from seawater. During diving, tanks could only be blown out by air pressure. The bilge and auxiliary pumps were installed to empty the bilge and for trimming, not for emptying ballast tanks. Air pressure in the bottles were replenished by the Junkers compressor. Ah whatever
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08-18-16, 12:09 AM | #17 | ||||||
Born to Run Silent
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08-26-16, 07:24 AM | #18 |
Planesman
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Would like to continue this interesting conversation. Going trough uboat manuals and i see three things.
1) Blowing 2) Venting 3) Flooding I know what blowing and flooding does. What does venting do? In many places it seems to be similar to flooding but then i see stuff like this in manual standing side by side "Vent valve for main ballast tank 3" "Flood valve for main ballast tank 3" What is the difference? |
08-26-16, 02:54 PM | #19 |
Watch
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Ahoi Gotmilk,
on VIIC is tank #3 the middle 'Tauchzelle' (bad translation 'diving cell' ) There are tanks to compensate torpedos, tanks to accelerate diving... but 'Tauchzellen' are for trimm... These tanks get a valve to let the air out off the top "Vent"; or to let the Water in from the buttom "flood"; also to "blow" compressed air into them... eg: go Dive: both open go Surface: 'Vent' close, 'flood' open and 'blow' out the water through the opened 'flood' with compressed air now comes trim: keep Periscope depth: 'vent' close, 'flood' open and the sub 'swims' under water on the pressured air inside that tank Last edited by Feldpost; 08-26-16 at 03:17 PM. |
08-27-16, 04:33 AM | #20 |
Planesman
Join Date: Sep 2007
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haha gotcha.
Thanks a lot. Last edited by Gotmilk; 08-27-16 at 04:47 AM. |
08-27-16, 10:31 AM | #21 |
Eternal Patrol
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08-27-16, 04:36 PM | #22 |
Dipped Squirrel Operative
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No, there are only five
(stand-in for Schroeder )
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08-28-16, 02:52 AM | #23 |
Born to Run Silent
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So, we are deciding to model three discrete sets of ballast tanks:
MBT #2 MBT #4 Negative tanks Sure, we could include all the tanks, including trim and torpedo compensating tanks but we only have 4 players (not a real human crew of 48), so it makes sense to design the game so that 3 or 4 guys can manage it without this activity becoming a burden that takes away from the gameplay. You know, finding a smart balance so that the players have some procedural activity without turning this into real work. Here's the current crash dive game procedure: 1. Order: "Alarm!" Alarm bell activated by Chief. 2. Chief switches from diesel to electric motors, then orders ahead flank. 3. Captain closes voice tube on the bridge, descends into conning tower. 4. Exec takes a depth sounding, reports depth under keel. 5. Exec marks on chart where boat’s location is at the start of the dive. 6. Captain closes conning tower hatch, says “Conning tower hatch is closed" 7. Chief silences alarm bell. 8. Chief sets dive planes to forward hard down. 9. Captain orders “Flood” 10. Chief opens the MBT #4 vent valves allowing seawater in the main ballast tanks. 11. Exec opens the MBT #2 vent valves allowing seawater in the main ballast tanks. 12. Chief opens the Negative vent valve allowing seawater in the negative tank. 13. Captain sets depth with order “Go to depth, xx meters.” (At the front usually to 80 meters) 14. Once the down angle indicator indicates the boat has a down angle, hold: 8 to 15° 15. Chief closes vent valve for negative tank and blows tank to control dive before desired depth is reached. After execution of the order "Flood" and the boat has a noticeable descending tendency, the negative buoyancy tanks are expressed (blown by compressed air), by the Chief, who will call out, “Express”. It is critical that the Chief perform the crash dive operation competently, otherwise the boat could dive out of control, below safe depth, or with a dangerous down angle. 16. The ordered depth is achieved by the Chief’s operation of the dive planes. 17. After the report of Chief: "Boat is at xx meters", the order always follows, Captain: "Close vents". 18. Chief and Exec closes MBT vents valve. 19. Exec checks bilge level and reports any leaks or problems, “No leaks detected, Herr Kaleun”. 20. Chief checks compressed air level and reports, “Compressed air at xx millibar, Herr Kaleun”. 21. Captain orders new speed, course as necessary. 22. Chief reports battery status, “Both batteries at xxxx amps, Herr Kaleun”. 23. Sonar reports any contacts.
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08-28-16, 03:31 AM | #24 | |
Grey Wolf
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08-28-16, 04:21 AM | #25 |
Born to Run Silent
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I have no idea what you mean.
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08-28-16, 05:05 AM | #26 |
Dipped Squirrel Operative
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I think this sounds too good to be true, this would be the first sub simulation ever to give you such control!
We err you cannot model each and every aspect of a rather complicated U-boat unless we had 50 trained online players, which will be unreasonable anyway, so this looks like a reasonable compromise
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08-29-16, 03:48 AM | #27 |
Born to Run Silent
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Thanks Kai. Yeah, any game requires some compromises to keep it manageable for the player(s), but at the same time include activities that are enjoyable, add to the gameplay, and are tactically necessary. We want to include more ship management activities, since we have 4 real people managing the boat instead of the solo single player; plus we think it will be more interesting that simply pressing the "D" key or other keyboard commands. This was the dev's original concept and one of the things about Marulken that got me so excited to work with them. They don't want Wolfpack to be another subsim in the mold of SH and most of the others before it. It's time to play a different way.
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08-30-16, 11:49 AM | #28 |
Grey Wolf
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#1. A lot of orders, included criticals (closing voicetube / tower hatch).
I'm afraid to ask: what with singleplayer / 2-players procedure of crash diving? #2. Remembering this scene of Duke Nukem 3D (1996)... Will we able to close toilet valve after using it to prevent fate like U-1206?
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08-31-16, 08:12 AM | #29 |
Dipped Squirrel Operative
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Yes, and there will be an olfactorial smell generator to be plugged into the USB port, for immersion. Dial-a-shtink.
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08-31-16, 10:59 AM | #30 | ||
Gefallen Engel U-666
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It wasn't a pig boat fer nuthin'!
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of a US Navy chief emptying the communal Engineroom steel can prior to towing (no one else would do it) a very large two-handled affair used aboard the captured U-505. Now that's reality! Any one with access to the photo please help (<thnx Firefighter)
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"Only two things are infinite; The Universe and human squirrelyness; and I'm not too sure about the Universe" Last edited by Onkel Neal; 09-01-16 at 02:49 AM. |
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ballast, tanks, valves |
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