Adds 3 new locomotives in total.

Locomotives:

Locomotive

Max speed: 259.2 km/h
Base game locomotive. Changed icon and reverse power to 100%.
Can be refitted to heavy and express locomotives.

Heavy Locomotive

Max speed: 205.2 km/h
Very high traction, can accelerate heavy trains to max speed very fast.
Very fuel efficient as it can replace 2 base locomotives.
Can be refitted to nuclear locomotive.

Express Locomotive

Max Speed: 324.0 km/h
Low air friction and weight allow this engine to go very fast.
Burns through fuel nearly twice as fast as base locomotives
Can be refitted to nuclear locomotive.

Nuclear Locomotive

Max Speed: 302.4 km/h
Runs on nuclear fuel cells. Acceleration is similar to heavy locomotives on solid fuel.
Warning destruction will trigger a nuclear explosion. Keep them save from biter attacks.

Thanks to Meppi's - Better Icons for icons fitting the new locomotive and cargo wagon design.

Changelog

0.6.1
- fixed item sorting
- updated description
- migration compatibility to Train Overhaul

0.6.0
- updated to Factorio 0.16

0.5.2
- rebalanced Express Locomotive, on rocket fuel it no longer accelerates 6+ wagon trains as fast as nuclear or heavy locomotives
- added missing 100% pushing power to Heavy Locomotive

0.5.1
- increased HP of heavy, express and nuclear locomotive
- added setting to disable nuclear locomotive explosion

0.5.0
- set pushing power to 100% for all locomotives
- added nuclear locomotive

0.4.2
- added 64x64 technology icon

0.4.1
- changed listed speeds from solid fuel to coal/wood

0.4.0
- release for Factorio 0.15
- rebalanced tech and locomotives
- changed fluid wagon icon to mach actual entity

0.3.2
- fixed possible errors with mods changing the base locomotive recipe

0.3.1
- fixed possible variable conflicts https://forums.factorio.com/viewtopic.php?f=23&t=43392

0.3.0
- added German locale
- changed base locomotive description to be in line with the added locomotives

0.2.0
- moved new locomotives to new technology
- changed description for better formatting
- gave both locomotives more power when pushing in reverse

0.1.0
- initial release