Cab Forward
A steam locomotive with the engineer's cab placed ahead of the boiler instead of behind it for visibility in tunnels and snow sheds.
Cab Signal ...
Cab forward
An articulated steam locomotive peculiar to the Southern Pacific, built with the cab in front for visibility in tunnels and snowsheds.
Cab unit ...
Malley Reference to the Mallet Articulated Cab Forward steam locomotives used by Southern Pacific railroad in the 30's, 40's and 50's.
Cab Forward - Articulated type steam engine, popular on Southern Pacific RR. Engines were reversed; cylinders toward the back, cab and smoke stack at front.
Cab forwards or Big-Boys would look silly pulling a local passenger, mixed or freight into this SMALL branch line terminal. Suitable motive power would be a ten wheeler or less for passenger and a light consolidation or mogul for freight.
 See also: Engine, Track, Locomotive, Unit, Truck
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