For anyone who doesn't know: this is basically how most automatic car transmissions work. Sure, there are some dual clutch and eCVT hybrids that work differently, but most traditional "slushbox" autos use a hydraulic torque converter.

Namings in the game seems straightforward enough. DE2 - Diesel-electric, 2 axles DE6 - Diesel-electric, 6 axles DH4 - Diesel-hydraulic, 4 axles DM3 - Diesel-mechanic, 3 axles

I love that suspension swaying, I can barely contain myself

Very cool video again, as always. I noticed 2 things in Your coupling habits, that I have learned differently in my time as a loco driver like 10 years ago. So my knowledge is a bit faded now but I think it still applies here: 1st: always couple the hook first, break lines afterwards. Because the hook is Your means to secure the cars. The lines do the opposite. And 2nd: never use the loco's coupling unless the car's is broken. Because repairing a loco is way more expensive than fixing a car. I hope that makes sense. TC & Thx 4 Your cool vids. :)

Very cool to play, as someone who drives the real Locomotive iRL (German V90 Family of Locomotive classes)

Finally the new diesel!

The torque converter also fills up when the throttle is up and empties when the throttle is down, so the "connecting" fluid is not uselessly sloshed around when idling

Finally seeing this locomotive in depth after all the teasers, wonder what the new steam locomotive is gonna look like.

DH4 requires a few additional licenses; I believe it is train length 1+2. So, it is a bit more expensive than DM3, which has no license-requirements. 30k for DM3 and 80k total for DH4.

The torque is higher when starting out because generally speaking Hydraulic fluid is non compressable. So the force or pressure of the fluid will be higher, therefore creating more torque exerted. As the wheel speed increases the pressure will drop in the hydraulic system as it takes less force to keep the wheel moving then to get it moving and then less torque is required.

That's the one, I've been waiting for: the diesel hydraulic loco. This kind of transmission really fascinates me. The fact, that you can use oil to transmit the power and torque to get a train moving... It's just so cool. It does take a while though to understand the principle...😅 Now, onto the loco: I must say, the simulation is quite good. I know the reallife example of these locos all too well (german V90/V60 for the cab). I work for DB Cargo and I'm currently learning how to operate the V90. There are of course some differences: The most important beeing, that the diesel engine can indeed return to idle speed while the loco moves, because the torque converter can be filled and emptied with oil. Also, in reallife, these engines are not equipped with dynamic breaking. Though, in some situations, we wish they were.:) But, as I said, the simulation here already is quite good. Well done, developers, well done. Thank you so much for bringing our reallife workhorse into this game! And thank you, Squirrel for showing it off!:)

Surprised they didn't model in that at idle it's still putting power to the wheels if only slightly. So if you backed off fully from the breaks it would roll in the direction you have selected if just a bit. (This doesn't factor in if the vehicle is heavy enough that the output provided at idle is enough to overcome the weight.)

Now this locomotive have me pumped up. just waiting for the release!

Looking fowards to commence training as the end of this month. Thanks so much for the explanations!

Wow, perfect timing! Just finished your DE2 / DE6 video, went back to the KZfaq home page, and saw you had posted this video. Cheers!

Don't be shy to add a picture / schematic / diagram when you explain something like the torque converter. Thank you Squirrel.

Finally we get to see a more in depth look at the interior! Crazy how much new stuff this update adds

FINALLY some good traction, Diesel Hydraulics are so fun to drive irl

these updated was well worth the wait

Thanks for doing all these videos they're very informative and I'm looking forward to this update!

Important to note, this loco is in theory compatible with DE2 through MU cable connection, possible to hook it up to DE2 and work with it. However this has a very different notch-torque mapping, in low notch almost no torque, you need to rev it up to work. Meanwhile DE2 needs to stay in low notch until amps go lower otherwise it overheats. Tried to take a 1000 ton 4 job consist from harbor to MF using a DH4 and a DE2 (was no other DH4 in the HB and I have no DE6 licence in the new game). No joy, stalled out on the first hill. Then gave it an other DE2, yet 2xDE2+DH4 (2x400+800=1600 ton rated) not able to move the train properly. The only way to move the train with 3 engines was to detach DH4 from the MU consist and control it separately using remote. I remember in Overhauled I did this trip, cca. 1000 ton train with 4xDE2, was just as painful as it is now :) (DE2 is not fit for road jobs...)

Thank you for going over all this I had a know how of how to run the engine but its good to understand why it works

I’m so excited to start driving some new trains!

I really don't know how but I had figured out it works like that. In my head made sense. Thank you for the teaching!

Great fun in VR. Looking forward to the new release. Thanks for the vid.

Torque converters are bloody clever, the secret is a stator disc that sits in between the turbine and the impeller. During stall ( the greatest difference in speed) the fluid coming out the turbine hits the stator, kinda creates a 'ground effect' kinda deal ( when helicopters/planes are close to the ground) then as the speeds start to match, the stator is 1 way clutched so it can start spinning with the fluid instead of sitting in the way

Great video, thanks a lot! Just the right amount of tech details for me to understand how this loco works, now I'm off to give her a spin on the tracks :)

The DM3 and DH4 are great additions to derail valley

It feels like this is going to be my go to locomotive, just because I feel it's neat.

I'd take dh4 over de6 any day. Clear view of the track and important dials like breaks are not way out of sight. A little disappointing the cab doesn't look like a German V100.

Thanks for a concise but comprehensive leeson on the DH4!

Thanks, can´t wait to the update. Thanks for the update. Nice Locomotive.

Excited to see the DM3, I love diesels with side rods!

I love how the locomotive is modelled after the german V100 Diesel Hydraulic Locomotive which is one of my favourite locomotives of all time! Amazing Video, im really hyped for the Update!

Nice run-through Squirrel.

I had no idea it was possible to have a dynamic brake on a diesel-hydraulic. Thanks for explaining that, so it sounds like it uses the "transmission" to turn the kinetic energy into heat, which is dissipated by the radiator fans. Very few diesel-hydraulic locos made it to North America, so it was always more of a novelty over here.

Another fantastic video!

As a beginner, I had mastered both the DE2 and the DM3, but this beast gave me a hard time driving uphill under load, even though it's simpler to drive than the DM3. The tutorial confused me saying "up to 700 rpm" but now I know that you can push it hard to the limits as long as it does not overheat. Thank you so much for this lesson, now driving the DH4 has become a piece of cake.

6:55 "Hows this engine work?" "Don't worry about it."

My new favourite machine I think … looking forward to it. Thanks much, awesome as usual!! Hope it’s just another shunter and copay is still $100.

Oh my god i want this game! KZfaq randomly dropped me but i started to watch and now i'm thinking to buy it on Steam. Geez this is the best and most detailed train sim i ever seen. I played a lot with Dovetail's, and earlier MSTS and Trainz but this is something different. I keep watching all the related videos.

This is my new favourite engine!

the torque converter's impeller and turbine are shaped so that when there is an rpm difference the oil will flow in a circle, so the oil goes from the impeller spinning fast, hits the slow moving turbine, and loops itself back through the impeller to be sped up again. The higher the rpm difference, the faster the oil loops and the more "times" it multiplies the torque.

DH4 has quickly become my favorite loco in Derail.

I find this one to be great when you just want kick back and enjoy the ride

My wait has ended now I’m happy

Woahhh love this one right away. Always thought the de6 is to big for me, this one looks phantastic mix from being more potent than the small ones but more handy than the big boy. What i dont like is that we dont have an engine oil and engine water temp, but i can still hope they will add some more stuff in the future (more brreakers, more gauges, more temps/mechanical gadgets to play with)

So think of a torque converter like 2 fans. Leave one off but turn on the other one and the fan that is off will start to spin a bit. Obviosly its a little more complicated but think that with some very thick fluid in there that moves a lot of mass. The spinning fan is the engine side and the fan thats off is the driven side (drives the vehicle)

What im seeing is that what people are calling a "slushbox" is actually a fluid/hydraulic coupling (the fluid itself is the connection, rather than a clutch) What squirrel said about the DM3 was actually a MECHANICAL or clutch coupling Hence why hydraulic and mechanical respectively "Slushbox" is slang for "i don't want to use the proper definition for it, because i see it like this" because when a torque converter is low on fluid, it will feel like "slush" in a "box", hence "slushbox" Think of it like this A CV joint is "constant velocity" meaning that it throughout the joint, it stays at a constant rotational velocity, rather than a "universal" joint regardless of its angle A "universal" joint can be used in almost all applications, so its use is "universal" because it has an infinite range of angles that the joint itself can handle compared to how a "CV" joint needs certain criteria or space to slide that may not fit in the same area, for the same required stresses applied A "torque converter" takes the engine's "torque" and "converts" it to hydraulic movement, which "converts" it to mechanical movement on the other side Etc.

If dropping the throttle makes the difference negative and begins to slow the loco, what is best practice to maintain speed? keep the throttle engaged slightly?

Ahhh can't wait!

Well I think dh4 is like Siemens desiro dmu because when you throttle up the rpm goes to one value and then drops and continues like a automatic gearbox.

alrighty now I want to play this

Gosh darn it. I'm hype for this game again... :D

Now it gets interesting. New Locomotives. XD Cant wait for the Other 2 new ones. And the Changes to the Steam trains in general.

There is a video on youtube explaining working od DH in detail (its just same but with visuals) its called "How diesel locomotive works part 2" or something

Something about the dials, gauges, and ometers pleases me, probably the background and needles.

Cant wait!

Had no idea how to operate this loco and ended up with $30K worth of damage to the gearbox. Thanks for the guide, now I now what to look out for.

Good Stuff ❤

What is the pulling capacity for this loco?

Hey squirrel love your vids especially your uts2 vids id love you played it again❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️💯💯💯💯💯💯💯

Have they over done the bouncing around of the train now? That seemed to be bouncing around an awful lot and I fear I am not going to be able to play it as it will make me car sick. Another great video, you explain things so well!! Thank you looking forward to the update

so you still start with the DE2 diesel-elec shunter but then you can move up to a DM3 then the DH4 and finally the massive DE6 interesting how we have the "endgame" diesel and "early game" diesel but both are D-E buit between the two we get a hymech and a classic diesel mechanical

10:15 you clever bastard

As someone who earns his money by shunting with the "BR 294" und "BR 296" of the V90-Family at DB Cargo AG in Germany I was freakin' excited when I saw that a loco based on my work place comes to Derail Valley... But man this thing is nothing like the real loco. Yea it's diesel-hydraulic. But that's it. The controlls, the dumb "omg you have to watch out for oil temp" thing are big downers.

Nice

It's a hydraulic, which means it has a camshaft that breaks on occasion

can't wait new meta quest 3 since I sold the 2 long time ago to play this again

I've been waiting for this update for years! Kinda sucks we aren't getting any new locations though.

this has a lot of simelarities of the V60 and BR290 from the DB

Will you be making a video about the SH282 as well?

What kind of load limit are you looking at as compared to the DE6? I'm assuming it will be in between both the DE2, DM3, and the DE6?

Squirrel end my suffering, IS THERE NEW STEAM ENGINES!!

3 days till simulator!

A question or two.. 1/ have they changed the weights these engines can pull and what is the max each can do? 2/ Does the remote control work with this engine? Thanks

Also, does the remote work for this loco?

I wish they would introduce campaign/missions and career mod and also achievments it would make the game even better :) btw very nice loco. I'll definitely pick this up after first few hauling missions. Is it going to be possible after the update to leave the train and change the rail switches in advance?

Yet another guide that leaves out essential information. what's the max load it can pull Squirrel? Might that not be important to know? All the loads in simulator have changed.

How viscus does the fluid need to be? And how far away is the input impeller to the output turbine?

Were you attached to that load of cranes when you showed the temp? Thing took off instantly under heavy load.

It's finally happening guys! STAY CALM!

This is a DB V90

anyone noticed, that its basicly an BR 100 from Germany? at least optical.

@squirrel How do we find out the pulling weight capability of the new and existing locos?

Friend pointed out it looks like the loco is "swimming" too much. Is that much suspension swaying normal?

Interesting, a blue lamp on the RPM gauge (who knows what that's for) but no lights for the actual gauges....

Where are the ingame engine books? I notice the licenses no longer tell you the haul rating of each engine anymore either. I remember the shunter *claimed* 400 tonnes (lol) and the 2-8-2 was rated for up to 1,000 tonnes but what about them all now?

How much weight can you pull on level and on a climb with this one?

Heaven above does this engine make a bunch of racket for the work out does

What about the ratings in terms of load capacity? in tonnes?

She's beautiful the DH4, can't wait for update even its going to melt my old gal of PC.

Thanks to the new "Simulation" update of "Derail Valley" we have a lot of more and more fun :) ! There is also a matter, that is present with all of the "fun" simulators. In real life, the temperature of the transmission fluid is very important but less important, than the engine coolant/oil temperature. In this simulation the "fun" factor i being aware, that something will break up eventually and our loco will blow up sky hi, so we won't be bored to death, as we must take care of running effort :) This is still great! SteamVR is waiting -.-

You really make me want to buy this game but I can't afford it 😢

Interesting new (to the game at least) mechanic, I like it. Does anybody know if the remote will work with this engine?

Some npcs, traffic, ability to get npcs as buddy in cab, ability to tell npcs what to do (changing tracks?) Some survival elements coffee water pub in city? Having an beer after an day at work, Ciggatertes maybe and food? More buildings , looks pretty empty at moment , I must admit it, this game it's best 👍 you really need to work, not like in other games where u put pantograph on reach 300 and that's all. And put some eastern European locomotive in 😂

I hope there is a way to turn down the bobble head action.

So uh I think you left the handbrake on on the wagons

It looks like the german DB BR 211 or something, is that loco it?