The sole K29s, PRR 3395, was constructed by the American Locomotive Company 's Schenectady works in 1911 as a demonstrator engine for the Pennsylvania Railroad. The success of the single experimental K29s lead to the development of the equally successful K4s class Pacific and L1s class Mikado locomotives. [4]

By 1913, PRR had placed another order with ALCO for a further improved type of Pacific, which it classed as the K29. This engine featured multiple improvements over the previous models, including a very large boiler and brick arch firebox.

The PRR inherited twelve "Pacific" locomotives when the railroad absorbed the Vandalia Line, in 1917. These ALCO built 4-6-2 locomotives weighed 263,000 pounds and had 80" drivers, 24 x 26 cylinders, a 200 psi boiler pressure and they exerted 31,824 lbs of tractive effort.

The sole K29s spent its entire operating life on the PRR's Pittsburg Division main line pulling limited passenger trains and being used as a helper engine. Rumors circulated stating the K29s was able to haul 13 full sized passenger cars unassisted on an uphill grade between Gallitzin, Pennsylvania and Altoona, Pennsylvania.

The lone example spent most of its life on the PRR's Pittsburgh division main line and was retired around 1929. Quick facts: K29s class, Type and origin, Power type, Buil...

72 blt by Alco and by PRR Altoona 1911-1913. Same as K2 except higher firing deck (77" vs 66") Pittsburgh, PA. Notes for classes K2, K2s, K2a and K2sa: all had 24" x 26" cylinders, 80" …

Jan 18, 2002 · The K4s evolved out of several other types of PRR locomotives, most importantly the experimental K29 Pacific, and the PRR's fleet of giant 4-4-2 "Atlantic" types, the E6s.

Of special note is the first locomotive illustrated, Pennsylvania Railroad K29 Pacific No. 3395. It was the only one of its kind constructed, but was the prototype for the ubiquitous K4 class — none of which were built by ALCo.

Nov 24, 2013 · How did the K29 get it's 'name' from the PRR locomotive designation scheme? Some have explained that in 'modern internet/computer/software' terms, it would have been 'K.2.9'.

The sole K29s, PRR 3395, was constructed by the American Locomotive Company 's Schenectady works in 1911 as a demonstrator engine for the Pennsylvania Railroad.