Re: previous posts on this thread;
Michael Allen's comment about the different color on the first car behind the locomotive: It is my understanding that these cars were extra water cars (water bottles) and were fitted with hand rails on top for safety while taking water.
ksivils comment about how useful these engines might have been on the Rio Grande narrow gauge had they been widened from 30 inch gauge to 36 inch gauge - the 2-10-2s weighed in at 53 tons compared to 78 tons for a K28 or 94 tons for a K36. While it seems that these engines would have been significantly less powerful, they did haul 1870 ton trains on a 10-hour 158 mile run. Unlike the Rio Grande engines they were stoker fired and had the efficiency improvements designed by LD Porta. I have never seen a tractive effort figure for these engines, but in any case they are mighty midgets.
Another comment regarded slipping drivers - I recall these engines did struggle and slip their drivers starting heavy trains.
Russo's last comment about the 1978 photos - Thanks.
Here is one more photo of a "mighty midget" arriving in Rio Gallegos