Class 37 is now ready for beta testing! Open your Steam client and right-click on the game, then select Properties from the pop-up menu. From the properties window go to the Betas tab and choose beta from the drop-down menu (no password required).
The existing timetables have been extended with some new express and semifast passenger runs for the 37, as well as a couple of early morning newspapers runs.
Remember to use the filter at the bottom of the service selection menu to find the new runs. Note how the "Class 37" is incorrectly sorted after the "1xx" railcar classes:

How to drive
- If you find yourself in the wrong cab at the start of the run, press (P) to switch to the other cab (but release the handbrake first)
- Use the (6) key to return to the number 2 cab from an external view
- Hold down the (B) key to raise the securing pin in order to release the train brake controller from the shutdown position
- Train brake release can be sped up by holding down the release key (E) (a spring automatically returns the controller to the "running" position)
- Enable the "show which key to press" tutorial if you're not sure how to operate the locomotive
Other fixes
- Fixed duplicated vertices and faces in railcar models for improved looks and faster rendering
- Fixed Class 03 physics bug that made its transmission and brakes 2-3x too powerful
- Fixed various service pathfinding problems
- Fixed signaller holding signals at danger for too long under some circumstances
- Improved distant signal placement in route editor to better adjust to different line speeds
- Fixed peak service generation tool in timetable editor to leave out seconds from service starting times
- Fixed door creaking sound
- Adjusted interior sound muffling properties to make high frequencies less audible
- Widened text field caret to make sure it's always visible in all GUI scale settings
- Fixed right-click view menu popup sometimes not opening
Known issues
- BSK guard's door doesn't open
- RMB buffet vending stand is missing
- Siphon G doors don't open
- Sometimes you spawn in the wrong cab
- Wheel and rail sounds start clipping at high speeds when they're loud (this is also a problem with the Class 03 since the previous update)
Known Class 37 issues
- The loco uses hydraulic torque converter physics because diesel-electric traction is not supported yet
- The ammeter is only for decoration
- The spring loaded release position of the train brake controller might not engage properly under low frame rate
- The loco can't be used in rescue yet
- Cooling fan doesn't work yet
- The model and livery are not quite correct for the 60s setting
- Missing sounds: engine priming pump, turbocharger, compressor, exhausters, traction motors, various rattles
There will be at least one more beta version before the official release