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Dear CZ,I do not believe that the Q2 was so powerful. It was based on the boiler of Pennsy 2-10-4 "J" class (based again on C&O T1), and if I am correct, Q2 tonnages were lower than that of the "J" . All had 69" dia. drivers,btw.Pennsy was surprised, that the 5001-class on the Sandusky-line was superior regarding higher HP ( ~200 ) at higher speeds in relation to their own "J" class. About the Q2-tests, I have to leave it for some people knowing much more about this, but the often mentioned 8000HP was more a performance stunt, than actual capacity under real conditions. The "J" left the Q2 behind, still running when all Duplexes were dead, although it was a '30 design (a very good one!)Very nice picture from N&W!Cheerslars
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