Pennsylvania No. 5547

==Pennsylvania Railroad T1a #5547==
PRR T1 #5547 is one of fifty production Locomotives of the T1-class 4-4-4-4 Duplex built at the Baldwin Locomotive Works. It was the test bed for the PRR's experiment of attaching Walschaerts valve gear to a T1 in order to improve the locomotive's performance. It was reclassified under T1a, becoming the only example of such.
==Gallery==
File:T1a.jpg
Category:Duplex locomotives
Category:Scrapped locomotives
Category:Steam locomotives
Category:American locomotives
Category:Freight locomotives
Category:4-4-4-4 locomotives
Category:Prototype locomotives
Category:4-4-4-4 steam locomotives
Category:Tender locomotives
Category:Passenger locomotives
Category:Unique locomotives
Category:Pennsylvania locomotives
Category:Four-coupled locomotives
Category:Locomotives
Category:Standard gauge locomotives
Category:Built in 1946
Category:Scrapped steam locomotives
Category:United States
Category:Baldwin locomotives