im doing a scince fair project and i need how fast is an sd40-2?
It depends on how it is geared…if it is geared for heavier freight service…perhaps 60-65 might be top end on it…light intermodal gearing could be 70-75 or more…
Maximum Speed Options With Gear Ratio
Top Speed* Minimum
Gear Ratio MPH Continuous MPH
62:15 65 11.1
61:16 70 12.0
60:17 76 13.0
59:18 82 14.0
*Based on rated RPM of traction motors.