EMD's first real model change following the FT was the F3. Upgraded
to a 1500 HP rating and featuring greatly improved brake, throttle,
and electrical systems as well as a new carbody, the F3 set the
pattern for the next decade of locomotive production. An F2 model
had been produced, but it was an interim model, essentially being
an F3 with an FT main generator and 1350 HP rating, intended for
operation with FT's. Santa Fe had no need for F2's and did not purchase
Santa Fe received its first F3's in November 1946 and deliveries
continued into 1949 when the F3 was superseded by the F7. Santa
Fe's passenger F3's comprised the 16 class (units 16LABC through
36LABC), all delivered in A-B-B-A sets, all set up for passenger
service and wearing the famous red and silver paint scheme. The
16 class F3's were subject to continuous improvement, both by EMD
during production and by the Santa Fe after delivery.
Early units 16LABC through 21LABC featured the classic F3 appearance
of raised radiator fans and slit type D/B opening in the roof, "chicken
wire" screening over the upper carbody openings, and three
portholes on the sides of both A and B units. They did not remain
in the as-delivered configuration for long, however, as the A-units
underwent a modification that eliminated the center port holes,
with the entire area between the two portholes being covered with
"chicken wire" screening. B-units emained mostly unchanged.
EMD soon made a production change that resulted in another appearance
change by the time units 22LABC through 29LABC were delivered. These
units featured low profile roof fans and two portholes on the A-units
with louvered filter openings between the portholes, but the "chicken
wire" screening over the upper carbody openings remained. These
and all subsequent passenger F's also featured stainless steel side
panels in back of, and below the portholes, whereas the earlier
units had painted panels.
The final delivery of 16 class F3's, units 30LABC through 36LABC
came from the factory with stainless steel grilles over the upper
carbody openings which eliminated the unsightly "chicken wire"
screening of previous production units, making them similar to the
later F7 in appearance.