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Engine number 2912 was built in January of 1944 for the Atchison Topeka and
Santa Fe Railroad by the Baldwin Locomotive Works, in Philadelphia, PA.. It
is commonly referred to as a "Northern" 4-8-4 engine, meaning it has four
lead trucks, eight drive wheels and four trailing wheels (those under the
Engine 2912 weighs
510,700 lbs. for the engine and 464,700 lbs. for the tender making a total
of 448 tons in working order (full of water and oil).
holds 24,000 gallons of water and 7,000 gallons of fuel oil. The oil used is
heavy oil similar to a light tar, the 2912 has always burned oil and never
used coal like some earlier models (namely the 3700 series) which were later
converted from coal to oil, using the bigger and longer tenders like the
There was 300 lbs. of steam pressure in the boiler when
There is a super heater in the boiler that increases the
heat absorbed by the steam so it can do more work, and a Worthington 6-sa
feed water heater that preheated the boiler water, the feedwater pump was is
on the fireman's side and it has an injector pump on the engineers side to
get water from the tender to the boiler. There are 220 3 1/2 in. flues and
52 2 1/4 in. flues. The super heaters sit inside of the larger flues. These
flues are 21 feet long.
is a total of 5400 sq. ft. of heating surface and an additional 2366 sq. ft.
of superheat area. The engine and tender together are 121 ft. 7 1/2 in.
long, 16 ft. high and 11 ft. 9 1/2 in. wide.
This is a standard
gauge engine which runs on rails 4 ft. 8 1/2 in. apart. The main driving
wheels are equipped with Timken Roller Bearings and the engine is also
fitted with Timken lightweight roller bearing rods, and Timken lightweight
Piston and Crossheads.
The valve gear is of the Walshaerts type. The
engine has 79,968 lbs. of tractive force (pull) and can develop 6000
horsepower or more. The rated tractive force is 66,000 lbs. but has not been
updated since the 3700 series and the 2900 series does have more power.
There was no silver paint used on the engine while it was in use. The
letters and all the tires (wheel rims) were painted with white paint, the
side rods were polished metal. Some other moving parts were polished metal
or painted white while everything else was painted gloss black.
engine probably never ran into Pueblo except on rare occasions, it being
built to run from Chicago to Kansas City, KA. And Kansas City to California
across the mountainous areas of CO., NM. AZ. And the California desert which
is by no means flat.
were six left in service in 1954, most engines being retired at that time
being replaced by the Diesel-electric or gas-electric engines at this time.
2912 was retired in 1954 and given to the city of Pueblo by the Santa Fe.