A diesel locomotive is a type of locomotive in which the power source is a diesel engine. Several types of diesel locomotives have been developed, differing mainly in the means by which mechanical power is conveyed to the driving wheels. The most common are diesel-electric locomotives and diesel-hydraulic.
Examples
Diesel-Electric Locomotives: How it works
Diesel-Mechanical Locomotives: How it works
Diesel-Hydraulic Locomotives: How it works
GE C44-9W: "Comfort Cab" Cab design Example
EMD SW1500: A Diesel Shunter/Switcher
BR Class 03: a Diesel Shunter/Switcher with a connecting rod
