09-07-2017, 06:08 PM
I found this from the Model Railroader forum:
Posted by cx500 on Wednesday, August 17, 2011 1:03 AM
The external differences are mostly in the body filters along the side of the carbody. The attached picture shows the RS-10 with 3 spaced body filters and then a twinned pair. The RS-18 has 5 equally spaced filters. But it is not that simple. On the RS-10 that twinned pair is for the dynamic brake, so units without that feature, or with it in the short nose, will not have it. Later RS-18s had two triple sets of filters at each end of the carbody, and there are other variations. The RS-10 had only a short period of production so there was little variation as delivered.
Then to complicate matters, CN had a program in the 1960s that essentially added carbody filters to both models and their fleet developed a very standardized appearance. A few units escaped, but very few.
On CN the long hood was the front for both RS-10 and RS-18. On CP the RS-10 was long hood front while the RS-18 was always short nose front. That affected the paint layout and items such as horn, radio antenna and bell placement.
That other company's magazine, RMC, had some useful articles on the subject back in 1994.
Posted by cx500 on Wednesday, August 17, 2011 1:03 AM
The external differences are mostly in the body filters along the side of the carbody. The attached picture shows the RS-10 with 3 spaced body filters and then a twinned pair. The RS-18 has 5 equally spaced filters. But it is not that simple. On the RS-10 that twinned pair is for the dynamic brake, so units without that feature, or with it in the short nose, will not have it. Later RS-18s had two triple sets of filters at each end of the carbody, and there are other variations. The RS-10 had only a short period of production so there was little variation as delivered.
Then to complicate matters, CN had a program in the 1960s that essentially added carbody filters to both models and their fleet developed a very standardized appearance. A few units escaped, but very few.
On CN the long hood was the front for both RS-10 and RS-18. On CP the RS-10 was long hood front while the RS-18 was always short nose front. That affected the paint layout and items such as horn, radio antenna and bell placement.
That other company's magazine, RMC, had some useful articles on the subject back in 1994.