The BLH AS-16 was a diesel-electric locomotive rated at 1,625 hp (1,212 kW), that rode on two-axletrucks, having a B-B wheel arrangement. It was the successor to Baldwin's DRS-4-4-1500 model, and remained in production until Baldwin-Lima-Hamilton quit the locomotive manufacturing business in 1956.
6022–6027 were a cancelled order by the Reading Co., The 6 were built in 1953 with dynamic brakes and conventional mu (as opposed to BLW's air-controlled design). In 1956 the P-RSL acquired the units and had the dynamic brakes removed, BLW air-controlled mu installed, only №'s 6024 to 6027 had steam boilers installed.
The AS-16 was designed as an all-around useful locomotive, capable of freight or passenger service.
The engine had optional benefits such as a steam generator or dynamic brakes.
The AAR Type B truck warranted higher speed than its siblings, the AS-416 and AS-616, with their three axle trucks.