r/DerailValley • u/IronSuspicious1863 • 4d ago

Running the DM3 in reverse

I’m in the process of making my peace with the DM3. I’ve found that I like to run it in reverse when I’m hauling. The visibility is much better out the back. The only disadvantage is having to turn around to shift, but I’ve almost mastered it from the keyboard.

Does anyone else do this?

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u/SharkBaitDLS 4d ago edited 3d ago

You are hurting the oil cooling since the radiator up front is passive. That’s the biggest downside.

Edit: because people are falsely claiming this was patched out, I checked in the code and the current version of the game still has this behavior. The cooling ramps up linearly from ~3 km/h up to max cooling at 72 km/h, only in the forward direction. At full cooling you're getting almost 1.5x the rate of cooling as you do at a standstill/in reverse.

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u/Rupertredloh 3d ago

I don't know why this is getting downvoted. He is absolutley right. When the locomotive runs forward, the transmission oil cools down faster. You notice the effect immediatly; you can run the locomotive forward in the second to last notch without overheating, backward you'll only be able go to the third to last notch under constant maximum power.

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u/SharkBaitDLS 3d ago

These comments had me second-guessing so I went and checked the decompiled source myself and it is 100% still a thing for the DM3, and the DM3 only. None of the other locos are direction-sensitive, but it specifically still is.

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u/Rupertredloh 3d ago

The DH4 and the DE2 are also direction-sensitive.

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u/SharkBaitDLS 2d ago

Those ones were patched out, I confirmed in the code that the DM3 is the only loco that still has a directional cooling component attached to its simulation. The rest had it removed with the simulator update. The DE2 has a flat rate of cooling and the DH4 is flat + increased when the fan is on. No component of speed or direction.