For my sw1500 kitbash project, I have drummed up some 3d models of the radiator cores commonly seen on the later generation EMD end cab switchers. The Atlas rendition as produced is woefully lacking in even simple accuracy but certainly in detail. I have several versions drawn as there appear to be several combinations of cores utilized on the prototypes, depending on any number of factors. I will get these printed, and possibly try to cast them in resin ultimately. The goal is to have the core “fin” area of the assembly hollowed out, with the top face replaced with a piece of finely etched metal screen, which is intended to let the sound out. This screen will play the same role as the speaker fabric that Bob proposes to use on his switchers, but I hope the metal will more readily accept paint and weathering without losing the properties that make it appropriate for use.
I’m curious whether the earlier iterations of EMD switchers like the sw8/9 that Atlas depicts use the same radiator cores? It’s easy to discern the cores on the later switchers, but I’ve never found a picture from the right perspective to see down into the radiator area on the earlier models.
I also have 3d cad for the radiator fan area, which shares many features with the earlier EMD switchers.
If any of this is applicable to Bob’s switcher project, I’d be happy to share.