Was the GP9 porthole window the same size as an E8 porthole window?
I can't imagine why not but stranger things have happened. Thanks in advance to all that respond.
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Since they were made at the same time, I would say yes, but cannot guarantee. We'll wait for Jack's answer.
Although I no longer have access to the EMD Number 90 Parts Catalog, I can only remember two different types/sizes of port hole "windows"; one was fixed, and the other was hinged in order for it to open. The hinged port hole window was located at the Hosteler Control station inside B Units, thus the Hosteler could open that port hole and look out for signals from a ground man.
FWIW, PRR GP9B's were phase III units. They had two 48" fans on top instead of the four 36" fans.
Fred
The most interesting thing about this question is ......why is it being asked? 
Originally posted by Breezinup:
The most interesting thing about this question is ......why is it being asked?
Answer: I obtained these off "Da Bay":
https://www.ebay.com/itm/O-Sca...p2057872.m2749.l2649
They fit perfectly for the Red Caboose GP9 Body. Yes I DID convert the fans to the "Big Three" 48 inch fans as well as sealed up the Number boards. Unfortunately, the Porthole window is more the size of an S gauge. From the Railfan and RR Drawings, it appears the porthole to be a tad small- but I want to be sure before I widen them out- hence my question. I have some Keil- line porthole windows that I would be using but like they say, "Measure twice- cut once!"
I wish I could post some pics by my Drives are maxed out with other pics and no longer accepts new pics. I am in the process of obtaining a Bigger external hard Drive so I can post some pics.
