Union Pacific The ''Route of the Streamliners,'' started accepting delivery of Electro-Motive F3 locomotives in 1947. Intended for passenger service, an early delivery was numbered in the 900 series and entered in UP's locomotive classification scheme as FP-3 locomotives. In the early 1950s, the 900 series locomotives were renumbered into the 1451 number series. Displaced by more powerful E8 locomotives, several F-Units received freight pilots as they continued performing dual roles for Union Pacific. Many F3s were ultimately rebuilt to F9 specifications.Model Features ? Kato USA is pleased to offer a new production of N-Scale F3 locomotives with a revised, DCC Friendly mechanism that will allow drop-in decoder installation. This production features an all-new combination of details; it is the first time we will offer the F3 in a Dual Headlight version. Of course, each roadname will have appropriate Steam Generator detail according to each prototype railroad. Models will feature our smooth Kato mechanism with five-pole motor and flywheels, fully automatic magnetic knuckle couplers, and improved headlight color. For the first time, the Kato F-Unit will include Printed & Lighted Number Boards!