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Description
Another part of mrbill6ishere's ideas for me to go along with the other "what if locomotives of the Pennsylvania Railroad" is this 4-6-6-4 based off of the Q2 duplex that I have designated as a GG2. Interestingly, (although not shown here) was my fist attempt using the same sized wheels as the Q2 resulted in a locomotive that would have been slightly longer and bigger than the Union Pacific's Big Boy! however the drawing here has what I will call my standard Alco challenger frame. The reason I did not do the larger loco is due to the fact that the PRR's T1s, S1 and S2, and Q2s were already almost too big for most facilities especially in the Eastern half of the system. Along side it is my older (and slightly controversial) NYC 4-6-6-4 which might have also been made if the PRR made their own challengers.

Description
Another part of mrbill6ishere's ideas for me to go along with the other "what if locomotives of the Pennsylvania Railroad" is this 4-6-6-4 based off of the Q2 duplex that I have designated as a GG2. Interestingly, (although not shown here) was my fist attempt using the same sized wheels as the Q2 resulted in a locomotive that would have been slightly longer and bigger than the Union Pacific's Big Boy! however the drawing here has what I will call my standard Alco challenger frame. The reason I did not do the larger loco is due to the fact that the PRR's T1s, S1 and S2, and Q2s were already almost too big for most facilities especially in the Eastern half of the system. Along side it is my older (and slightly controversial) NYC 4-6-6-4 which might have also been made if the PRR made their own challengers.