Ted S posted:
I'm pretty sure the byte 0x08 by itself tells a lot about the effective gear ratio, taking into account the driving wheel diameter.
I have 16 engines and I've looked at the bytes at RAM 0x08 and 0x09 to try to see some pattern.
All diesels have values like 0x54 0xAB, 0x54 0x85 and 0x55 0x45. These all have about 22mm wheels.
The 4 steam engines have these values
0-8-0 0x5D 0x64 27.55mm wheel
2-8-0 0x62 0x55 32.74mm wheel
Berk 0x50 0x23 36.27mm wheel
0-6-0 0x7B 0x90 27.11mm wheel
Maybe there are some hints in these numbers.