I know that the coolers and the pilots were changed. What exactly did the coolers do? Are there any good photos to show the difference in pilots? Were there any other differences?
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Originally Posted by jman08:
I know that the coolers and the pilots were changed. What exactly did the coolers do? Are there any good photos to show the difference in pilots? Were there any other differences?
Did you try the search function? This whole subject has been discussed at great lengthe over on the 3-Rail 027 Trains Forum.
You also might purchase the William Kratville book "Big Boy"; it will give you more information than you can understand.
Originally Posted by Hot Water:
Did you try the search function? This whole subject has been discussed at great lengthe over on the 3-Rail 027 Trains Forum.
I did and have read most the threads. I don't recall anyone saying exactly what the coolers did.
The cooling coils cool the air from the air compressors. On the first group of Big Boys they were originally mounted on the handrails on the pilot deck. While they worked very well they were prone to breakage, so on the second group they went with Wilson aftercooler units, which are smaller and less fragile.
Stuart
