(Image courtesy: Jay Balakrishna, IRFCA)
For all ye rail fans out there, feast yourself on this brilliantly designed flash site, showing WDM2 diesel loco working internals. For those uninitiated WDM2 == Broad Guage – Diesel – Multiuse.
The naming convention in a glance :-
W = broadguage, Y = narrow guage
D = diesel, A = AC power/electric
M = multi-use, P = passenger use, G = goods only
http://www.irfca.org/docs/wdm2-interactive.html