Operating Direction
Normally, the long hood is the rear of the locomotive. For early hood unit models, this was not the case; railroads preferred to run with the long hood at the front and the cab at the rear (referred to as operating long hood forward or LHF), as in a steam locomotive; this followed crew preference for greater protection in a collision. Later, preferences changed to having the short hood at the front and the long hood at the rear for better visibility, especially when more powerful engines required larger, visibility-obscuring radiator units.
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