Type VII C Submarine Engine Room explained | U-Boat Engine Room Tour
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- Опубликовано: 13 сен 2024
- I explain what I can identify in the Engine Rooms of U 995, a German Type VII C/41 WW2 U-Boat that is displayed at the German Navy Memorial in Laboe near Kiel. I never served onboard a Submarine but as a Ship Mechanic know a Thing or two about Ship Engine Rooms and Diesel Engines so this Video is based mostly on Guesswork. I didn't really think Things through when recording the Footage so there is some really shitty Camerawork in this Video. The Engine Rooms here are very similar to the ones that you can see in the Movie "Das Boot"
A few Additions of what I found out in the Meantime:
The Diesel Engines are MAN M6V 40/46 with a Bore of 400 mm and a Stroke of 460 mm. That gives a Displacement of 347 l.
The Diesel Engines are not reversible. That makes Sense though, because the Electric Motors can be reversed much quicker so Manouvering had to be done with them. Their lower Powere compared to the Diesels is no Drawback when manouvering.
When you can see the Machinist Johann in the Movie "Das Boot" opening Valves on the Engines where largr Flames are shooting out, he is opening the Indicator Cocks to check the Flame Appearance which indicates how clean and Efficient the Fuel Combustion in the Cylinders is.
I don't agree with RUclips hiding Dislikes. 194 Likes, 7 Dislikes, 2022-09-15. Just so you know what to expect from this Video.
Thank you for your videos, as a WW2 history buff, a huge Das Boot film fan and a new driver (practicing with a Diesel Volvo, a four-stroke car engine vs. a two stroke ship engine) my interests intercept nicely! I was also wondering about the flames from valves shown in the film.
@vaniljapulla These Engines are Four Strokes as well, otherwise they wouldn't have two Valves per Cylinder. There aren't many Two Stroke Diesels that Size; most are much larger Engines with very long Stroke to Bore Ratios. Take this 1961 Engine for Example: ruclips.net/video/tieAXy1Gpl8/видео.html
I've got a very detailed Video about that Engine coming up in May, very similar to my "Marine Steam Engine in Action Video", so it's worth to stay tuned. That is unless the Hafengeburtstag in Hamburg is cancelled again this Year, then I have to postpone that at least until July.
@@Genius_at_Work Possibly not so common in Europe, but in the US there is a huge following for Detroit/GM two-stroke diesels in trucks, buses, earth moving machinery large and small, boats, etc. They've been made in 1 cylinder up to 24 cylinder sizes.
Thank you for uploading this! It was the most informative uboat video I have watched so far! I recently because hyper interested in them from playing a virtual reality game where i am the captian of one. It is amazing how well they did the game because I am familier with the layout of the boat to the point where I know my way around on reflex run for whatever it is I need to do. I can recognize all the components and have a rough idea of how they all worked. It is cool to see the real life one compared to my virtual u boat! :)
I've recorded better Footage last September for an improved Video, but it's still unedited because I need to get my Shit together to script and record the voiced Part. Voiceover Videos always take me Ages to edit for that Reason.
I was a diesel mechanic on a US navy submarine and I agree with you I don't understand what the reason is to open the cylinder cocks when the engine is running other than to take pressure reading on the cyclinders which is something done occasionally and not frequently.
I was curious if the color of the flame would indicate anything. But i cant think of anything really that the flame intensity would tell you. Maybe somehow fuel consumption? Perhaps how much fuel is being let into the cyclinders from the nozzles?
Well if it wasn't blue there won't be enough Air in the Cylinder. This is what causes the thick black Smoke when the Engine has some heavy Load like when speeding up or-on a Ship-slamming into a Wave. If this also happenens without much Load you are either Way injecting to much Fuel or have a faulty Turbocharger or Valve Problems. There is a Video of a Tanker with damaged Turbochargers somewhere in RUclips, maybe I can find it.
Thank you for the video, very informative. My grandfather volunteered for South Africa in the Commonwealth in WW2 (North Africa), even though we came from Leipzig in 1700, haha! My father was a Navy diver at the time of the Angola war.
The valves on the top are compression releases. A very common device found on anything from chainsaw engines to something like this MAN engine. It makes the engine easier to rotate during startup by bleeding off some of the cylinder pressure during the compression stroke. The "flame valve" is to check combustion quality. A weak flame could mean anything from a dirty fuel injector to an incorrectly adjusted valve train.
Do you mean for turning the Engine before you start it up or for actually starting it up? Because I am familiar with opening the Compression Releases/Indicator Cocks/Drain Valves or however you wanna call them (seems to be very different between various Applications of an Engine) when slow turning the Engine but never heard of starting it up with them still open. I actually can't imagine that the Engine would have enough Compression at low RPM to start up then.
But several People have told about the Flames already. That's why I have included it in the (quite long) Video Description and have added German Subtitles where I explain that. I will also add that Explanation in ENglish tomorrow.
@@Genius_at_Work After watching this video here... ruclips.net/video/zLfa43_1WH8/видео.html . I have a revised explanation for you. Think of the compression release as means to allow the engine to be rotated much easier. You can hear the compression hiss sound as the older gentleman is turning the flywheel. I think the two of them are priming the oiling system before starting. The younger man in the front is operating an oil pump and the older gentleman is rotating the engine around to make sure the oil gets a chance to make it to all parts of the engine. The engine would be VERY difficult to rotate without those compression released open. You can hear the hiss of the open compression releases at 1:50. You can watch him open the compression release while the engine is running to check for cylinder compression. I have become accustomed to modern engines that close the compression release automatically once the engine obtains RPM right after start up. You still have to close them by hand on this old beast before start up.
@@jonkern9503 I am VERY familiar with the Things that you just described. In fact, you have linked the exact same Video which I have linked in the Video too (well, one of them). I've had to do this very Thing when starting up our old Deutz Engine in my Seaman School which also was a part of my Exam. That's what I was saying at about 04:15 Minutes. I have linked a Video of that very Engine in the Card in the top right Corner because I failed to take a Video of it myself. But maybe I will do that later because I still visit that School every now and then. Next I linked that Video that you have linked too. I also want to go there and film it the next Time they run it; it's almost next Door to me. And finally I have linked one of my Videos about a large Two Stroke Engine on a modern Cargo Ship. Also there we slow turn it with open Indicator Cocks before starting it up; I wanted to take a Video of that too but sadly the Footage that I recorded was total rubbish so I never uploaded or even edited it. But maybe I can make such a Video when I work again (I'm currently studying to get my Engineer Certificate).
But if you look at my Channel you will find a few Videos about two historic Cargo Ships, named Cap San Diego and Bleichen (two Videos each). They both are located in Hamburg and still seaworthy, I volunteer there every now and then on the Day Trips mostly on the River Elbe or Kiel Canal. They have the almost unique Opportunity to show the complete start up Procedure of a large Ship; usually they are on static Display and behave basically like a normal Building with Electricity, Water etc. coming from Shore. I want to make Videos that show starting up all the Pumps, pre-heating the Cooling Water (to get the Engines up to working Temperature, that's done with Auxilary Boilers), starting up the Generators and syncing the Grids (only on the Cap San Diego; the Bleichen uses direct Current), starting up the other Auxilaries like Compressors, casting off all the Shore Connections and then finally starting up the Main Engine. Without the Corona Virus I would already have done that on the Bleichen in May but now I have to post-pone it to next Year, the Cap San Diego most likely to in at least two Years. But maybe I can do a similar Video on much smaller Ships (talking at best 1000 kW) because I'm currently searching for a Job in this Summer Holidays, so it's worth to stay tuned.
@@jonkern9503 I just noticed that I forgot to pin your Comment with the Answer to the Indicator Cock/Cylinder Tap/Compression Release/whatever you wanna call them Question.
I understand the blue rods are the valves, but what do the other rods do that are between the blue ones (one per cylinder)
Hey, tolles Video. Jedoch sind mir bedauerlicherweise zahlreiche Fehler aufgefallen, die sich eingeschlichen haben. Ich arbeite tatsächlich beim Deutschen Marinebund und restauriere U995 und kenne so gut wie jedes Ventil und Kabel. Vielleicht kann man sich ja mal dort treffen, um eine Tour zu machen :) Hast du Discord?
Nein, aber ich bin mit dem Video auch schon lange nicht mehr zufrieden, und wollte deshalb ein neues machen. Das trifft sich ja ganz gut.
Its not a Gorge,
its a gaydge
eg. oil pressure gauge
Very informative! Thank You!
Tolles Video mein Freund. Du hast eine sehr schöne Kanal. Ich lass ein Abo da. Liebe Grüße aus Kiel.
Ich weiß auch nicht warum während dem Lauf der Maschine, die Ventile für die Indikation geöffnet wurden. Aber nicht nur Buchheim beschreibt das in seinem Buch, sondern auch Kaleun Schäffer in seinem Buch über die Unterwasserfahrt von U997. Leseempfehlung! Auf jeden Fall, erlaubte der Kaleun das Rauchen von Zigaretten bei Dieselfahrt im Maschraum, da ja sowiso die Ventile geöffnet wurden um die Zitat; "Indikation" zu machen wie er schreibt.
A reason i can think off, why they would open the indicator cocks, could be to blow out soot accumulation. I´ve sailed on ships where this was a problem when running on diesel oil.
That would make Sense, but I've never heard of that with Diesel, only with Bunker Oil.
It's a shame they had to ruin the original look by literally painting every possible surface they could find.
RUclips marked your Comment as Spam for some Reason. I don't get notified of that and check the Spam Filter every now and then only.
Anway, now that I have approved your Comment, they sort of have to paint over everything to prevent Corrosion. They just did a terrible Job at it, by just picking Random Colours and by constantly painting over and over again instead of chipping old Paint off. But IIRC they are planning to fix some Issues like that in the coming Years, when they fix the Bodge Job on the Bow as well.
Alarm!
Alle Männer vorwärts! Tauchpositionen!
Schnell, mach weiter so!
- Den Weg frei räumen.
- Lauf Lauf Lauf!
- Kampf Stationen!
- Aus dem Weg.
Bugflugzeuge hoch. Stern auf.
Bleib leise!
Meter runter. Einfach.
Sich verbeugen . Stern auf.
- Was ist mit den Torpedos?
- Jeden Augenblick.
Nicht mehr lange.
Great video. On the engines with the reversing cam, does the engine need to come to a stop before engaging the reverser lever?
At least the MAN Engines aren't reversible, a few Type VII had Krupp Engines, I don't know if these may have been reversible. Going astern required the Electric Motors. The Type XXI had the same MAN Engines, and a common Problem was Water getting sucked in through the Exhaust when the Electric Motors were going astern, but the Clutch between Motors and Engines was still engaged. Water getting sucked in could cause the Engine to hydrolock, potentially destroying it. This Mistake happened very often, because the Type XXI had the Exhausts of the Type XXI were placed much lower than the Types VII and IX, where Water couldn't get sucked in and thus going astern with engaged Clutches was no Problem.
Btw. I don't like the Quality of this Video anymore, hence I want to make a new and improved one, plus one of the Type XXI in Bremerhaven.
So if the max DC recharging rate was 120V the nominal value of traction batteries were 90V? That is huge...
Sir: I know nothing about submarines, so I'd be most grateful for a more detailed video if you choose to make one!
Fetzig:)
Just to let you know there's a u-boat 505 in the u.s.a. type 7 if you come to the u.s.a. you have to go to Illinois Chicago it is in a building in Chicago I hope you do come here and see it you can go in side it have a wonderful and great day by the way I had a uncle of mind how was a german partrooper in the battle of monte casino I am glad he made it out I am very proud to be a german I love the country and the people of Germany take care
Hey what's that big gauge at 7:28 between the two engines in the topside.
Didn’t quite get if there were any revers-gear type of arrangement for the propellers while running on the dieselengines? Or if the only possibility to put the props in reverse was to use the electric motors?
There isn't; going astern has to be done with the Electric Motors. But I found that out a couple of Weeks after I uploaded the Video by someone who commented on it on Facebook.
Do you know if the electric engines are original? They seem different...
They are original. Some Type VII Submarines were fitted with BBC Motors and others with AEG (I think but am not sure) ones.
@@Genius_at_Work Thanks :)
Just saw your Video; do you mean different compared to when you visited?
@@Genius_at_Work Nono :) Different from WWII, maybe changes done by the Norwegian navy in its service there.
@@BecksHobbyProductions Still original. But I've read that you want to visit U 2540 in Bremerhaven. Guess you know that it has different Diesels; originally it was fitted with the same ones as here but with even more Turbocharged to 1400 kW but has been refitted with V8 Diesel Generators in the 70s. So it was always using Electric Motors to power the Propeller, much like any modern Diesel-Electric Submarine does.
There's one thing I need some clarification on and that's those handles which you can see at 03:39. I presume one is a reversing lever, and I thought the other was the throttle, yet it seems to have two gated positions at the bottom of its travel and I'm wondering what that's for, or if those levers even do the functions I have described. If someone can help me out there, I'll be so grateful. Note: In Das boot, when the diesels are re-started, it seems as though when the guy pulls on that lever, the engines start. Is that just a red-herring or does that lever have something to do with starting as well?
Thanks. :D
The Diesel Engines can't be reversed; running astern had to be done with the Electric Motors. One possible Option is that one Lever controls the Fuel Racks which operate the Injection Pumps and the other one (which you saw in Das Boot) opens the Starting Air Valves.
I've had a suspicion that the 995 had been changed since WWII.
Not much. The Bow was replaced after some Time at the Beach in Laboe because it was rusting away, but all the other Changes are minor Technicalities like that Diesel Oil Filter. IIRC there were some Decoy Launchers added but I'm competent with Engine Stuff only so I can't really tell much about such Things. Keep in Mind that U 995 is a Type VII C/41, so it looks a bit different from your Average VII C in some Places, like the Snorkel, the four Liferaft Containers on the Forecastle Deck, or slightly different Bow Shape.
You can tell that the Bow was replaced because it is welded, unlike most of the Hull (minus the Saddle Tanks) which is riveted. There are Plans to add fake Rivets to the Bow to make it look less botched. Other Plans include fixing the Paint inside because as I said in the Video, it does look a bit Rubbish.
The Norwegians made a number of changes to the boat while it was in service with their Navy. Many of these changes were on the exterior of the boat, like the conning tower, compass housing, Balkongerat (sonar housing under the bow), and deck. There were also internal changes, but I do not know much about them. Eckard Wetzel has some great books on the subject. Unfortunately, it can be very hard to find photos of the boat from that time.
Speaking english on a german sub...
International Viewers, you know...
@@Genius_at_Work Maybe but you would have been kielgeholt back in these days for doing that.
@@Genius_at_Work Thank you very much for doing this! Engines and diesels I love. I'm not a kid anymore and trying hard to learn German but I have no one here to help. I will sub and thank you very much for creating this!!!
Well, it was not common to speak english. But on one german submarine there was a captain, who spoke fluent english, because he studied in the USA before the war. After surrender his boat in Argentinia, he could speak fluent with the american investigators.
🙄.. White...
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