Start Up of a WW2 Submarine Diesel Engine of a German U-Boat 🔊

Start up of a 6-cylinder diesel engine. The submarine engine RS 34 S was used in the Type XXIII submarines. Originally, it was designed by MWM as a diesel generator for the battleships Bismarck and Tirpitz. The engine has 108 liters cylinder capacity (18 liters for each cylinder) and 576 hp at 850 revolutions per minute.

These are the steps performed to start the engine:

0:08 - The young machine operator begins to pre-lubricate the engine.
0:32 - After reaching 2 bar oil pressure, the older machine operator turns the engine manually.
1:44 - The engine is turned by compressed air with cylinder taps opened to blow out water or oil, if present. The engine is still being pre-lubricated.
1:57 - The machine operator closes the cylinder taps.
2:14 - Water pump switched on (control cabinet in the background).
2:16 - Fuel valve opened.
2:18 - Injection pumps on filling: Probably, this means that the injection pumps are set to maximum as a basic setting (big wheel). The final fuel amount is set by the governer (small wheel in the background).
2:21 - Preheating
2:30 - Glowplugs are glowing.
2:34 - Engine start by compressed air.
2:55 - The machine operator checks the combustion by opening the cylinder taps shortly.
3:13 - Finally, he raises the RPM by adjusting the governor.

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[terrystephens]

I’ve seen several of these engines that were used in New Zealand for generating electricity for rural communities - I understand that they operated flawlessly for more than 50 years - a testament to German engineering.

[Milo_]

The sheer amount of brainpower, knowledge and engineering that went into building this is boggling. All without modern computers.

[the sheer amount of negative comments is unnecessary]

[cvinthe]

Mad respect and gratitude to these guys for preserving this historic gem and sharing its workings with the public.

[BBerckdano]

That’s the guy you want maintaining your stationary U Boat diesel. Absolute perfection.

[TheHillpeter]

I'm a Diesel mechanic.
Sounds so smooth sounding.
It's just amazing how they built everything without computers.

[murilovsilva]

Not only this engine is evidently very well maintained, you can see that this old man knows what he is doing. You can see it in the way he calmly works the procedures, adjusts what has to be adjusted, swiftly but never rushed. You can tell this man loves what he does.

[Mana-Chann]

Whenever you see a german mechanic turning knobs and switches..you know its the real deal

[keithglaysher]

The finest of German engines right there, I used to work for the UK agents for MWM. The sounds they make still makes the hairs on my neck stand up!

[jasonledbetter]

He truly adores this engine, every adjustment he makes and his calm demeanor.

[NovusDawn]

this thing is going on 80 years old and still starts and runs smooth as hell. Thing sounds like it just came off the assembly line yesterday. Shit was made to last back then.

[JungleYT]

Damned Germans... That runs smoother than most Diesel automobiles that I've heard

[groovejet]

Respect to the German Engineers for making something incredible

[rickeymitchell]

This engine is a work of art. The sound it makes is hypnotic and has quality that is tangible. My hat is off to German engineers of the time.

[oldpain]

That's a lovely sounding machine. There's something comforting about watching it come to life and start breathing. It's like a typewriter.

[MrCheckmateMarine]

I could listen to that all day. If you've never worked in or around a diesel machine you'll never understand it. A diesel engine, from the moment you start it, is just begging to run. The sound of it just tells you it wants to work and work hard. Raw power. Fun to be around. Great video

[wimjacobs]

Als voormalig machinist op de Nederlandse onderzeeboten van de Potvisklasse en de Zwaardvisklasse spreekt me deze filmreportage zeer aan. Zelfs de Bosch brandstofpompen zien er bekend uit.
De procedure bij het opstarten van de motoren (op onze Nederlandse dieselboten in de jaren ‘80 en ‘90) ging wel wat vlotter, alles gereedmaken duurde maar even.
Bij snuiveren, dat betekent de motoren onder water opstarten met de inlaat-mast net boven de oppervlakte, was het belangrijk te controleren of er geen water in de motoren was gedrongen. Daarom was het tornen met lucht heel belangrijk. Ondertussen werden koelwaterafsluiters, luchtinlaten alvast gereed gemaakt zodat ze onmiddellijk (deels automatisch) konden openen als het bedrijf werd opgestart. Na het opstarten, werden de gekoppelde generatoren direct belast zodat de hoofdbatterij werd geladen. Er was geen sprake van warmdraaien ze werden heel snel volbelast. Het waren 3 stuks twaalf cilinder Stork Werkspoor motoren, die leverderden 920 kW per stuk. Indien er externe dreiging ontstond werden machines volbelast gesnelstopt, alle afsluiters werd met hoge vaart dichtgezet, en indien nodig werd er direct weggedoken. U kunt zich voorstellen dat de motoren door deze behandeling geen lange levensduur kenden. We hielden de motoren wel op bedrijfstemperatuur als ze gestopt waren, evenzo probeerden we ze na te koelen, mits dat kon. ( Bij geruisloze vaart onderwater werden alle pompen afgezet) .Daarom werden de dieselmotoren elke drie jaar volledig gereviseerd. In de film gaat natuurlijk alles erg rustig en gecontroleerd, tenslotte willen ze de oude machine heel houden. In werkelijkheid waren de machinisten ( net als wij) natuurlijk jonge kerels, met 30 was je al heel oud. In de film Das Boot is te zien hoe het er werkelijk aan toe ging.

[alishanmao]

wow, this old guy knows every bit of this engine. he feels it :)

[sasha.escapo]

Вот это я понимаю музей. Действующий экспонат, а не крашенный пластик под стеклом.

[not-fedrayepps]

I work as a solar installer and I work with my hands everyday, after a while you can tell when something just flows. Watching this mans hands and the sureness in every touch has a reason. The smoothness in pulling that one particular wrentch out, adjuting and testing the airflow, awe inspiring...

[shanevermij]

If you have ever been on a conventional submarine, these are master pieces of engineering, brilliantly thought out and assembled, with even backup system for certain critical equipment. The engineers who design these machines are pure geniuses.