Over the course of looking at thousands of photos and writing the books,
here is the list I complied of 17 VO-1000s that were equipped with the 4
stacks:
#9350, 9351, 9352, 9353, 9354, 9355, 9356, 9357, 9359, 9360, 9362, 9363,
9364, 9365, 9366, 9377, 9378.
As best as I can determine, the following VO-1000s retained the single
stack:
#9367, 9368, 9369, 9370, 9371, 9372, 9373, 9374, 9375, 9376, 9379.
There are 2 locomotives (#9358 and #9361) where I have not been able to
make a determination if they were ever outfitted with 4 stacks. My
information shows that these 2 engines were assigned to the St. Joe
Division for most of their service lives. I do not have photographic
proof that these 2 ever got 4 stacks.
Maybe someone from the mechanical side can help here. All of the
locomotives that retained the single stack were all built in the last
group the Q received. The built dates were November 1944 and December
1944. I have always wondered if there were some internal changes or
modifications made to the VO-1000s along the production run which
resulted in the later locomotives not having to be outfitted with the 4
stacks. I have never been able to get any good information on this.
The other question that I have never found the answer to is when the
change from 1 stack to 4 stacks actually occurred and where the work was
done. The earliest date I can supply is that #9351 had 4 stacks in May
1958. Many of the other 4 stackers were photographed in 1960 and 1961.
Does anyone have a photograph that can support an earlier date when a 4
stack locomotive appeared? I am only guessing that the work was done at
West Burlington.
I hope this helps everyone out. This is the best data that I have. I
look forward to seeing everyone in Dubuque.
Mike
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