Even Bigger than a Mountain!!

Just like last week's feature locomotive, this locomotive was built for the Western Pacific Railway by the American Locomotive Company (ALCO) out of Schenectady, New York in 1938. But, as you can see, it is much larger

than last week's. The tractive effort of last week's locomotive was 40; this one is rated at 200. It is also a Mallet locomotive. You can see that there are two sets of cylinders driving the two sets of driving wheels. What happens is that the steam that is exhausted from the front cylinder makes its way into the second set of cylinders and drives the second set of drivers. This method of using the steam twice was invented by a French person with the surname of Mallet. This week the feature locomotive moved up from last week's 4-8-4 to this week's 4-6-6-4. Wait until next week!! This post card, too, was published by the elusive, Bob Fremming.