ALCO DL-109
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 A pair of Southern Railway DL-107s leads the Tennessean through Johnson City, Tennessee in June of 1950 |
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| Power type | Diesel-electric |
|---|---|
| Builder | American Locomotive Company (ALCO) |
| Model | DL-109/110 |
| Build date | December 1939 — April 1945 |
| Total production | 78 |
| AAR wheel arr. | A1A-A1A |
| Gauge | 4 ft 8½ in (1435 mm) |
| Length | 74 ft 6 in (22.71 m) |
| Prime mover | ALCO 539T* |
| Engine type | 4-stroke diesel |
| Aspiration | Turbocharger |
| Displacement | 8,822 in³ (144.6 L) |
| Cylinders | Twin Straight-6 |
| Cylinder size | 12 in × 13 in (305 mm × 330 mm) |
| Transmission | DC generator, DC traction motors |
| Power output | 2,000 hp (1,490 kW) |
| Locomotive brakes | Straight air |
| Train brakes | Air |
| Locale | North America |
The ALCO DL-109 is one of six models of A1A-A1A diesel locomotives built to haul passenger trains by the American Locomotive Company (ALCO) between December, 1939 and April, 1945 ("DL" stands for Diesel Locomotive). They were of a cab unit design, and both cab-equipped lead A units DL-103b, DL-105, DL-107, DL-109 and cabless booster B units DL-108, DL-110 models were built. The units were styled by the industrial designer Otto Kuhler, who incorporated the trademark 3-piece windshield design. A total of 74 cab units and 4 cabless booster units were built.
The different models were sequentially offered and all developed 2,000 hp (1,500 kW). The differences between the cab units DL-105, DL-107, DL-109 and between the booster units DL-108 and DL-110 were minor. The first unit built to ALCO Specification DL-103b, the Chicago, Rock Island and Pacific Railroad #624, was 4 ft 5 in (1.3 m) longer than the other cab units. The DL-103b had the two radiator sections positioned together at the end of the carbody, while all other units had a split radiator arrangement with one placed at the back of the unit and one situated in the middle. The DL-103b was built with twin straight-6-cylinder ALCO 538T diesel engines as prime movers; all other DLs in this series were built with the newer twin straight-6-cylinder ALCO 539T diesel engines. The DL-103b also had all-electric driven accessories, while the later models had belt-driven accessories.
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[edit] History
The New York, New Haven and Hartford Railroad received special permission from the War Production Board to purchase #0710–#0759 as dual-use (passenger/freight) locomotives; they were built between 1942–1945. The first 10, #0700–#0709, were delivered right after the attack on Pearl Harbor in December of 1941 from ALCO's Schenectady factory. The New Haven owned the most DL-109s, rostering 60 units in 1945.
There were three classes among the New Haven units noting some differences between the manufacture of each batch. The DER-1a (Diesel-Electric Road) units #0700–#0709 had the original design with a mass of vents on the roof, while the DER-1b (#0710–#0749) and DER-1c (#0750–#0759) had the simplified winterization hatches instead. The New Haven DL-109s could be found hauling passenger trains during the day and freight trains at night. The class was rebuilt once, replacing the plywood sides, removing the decorative side windows in favor of a steel screen, and several other changes.
Two DL-109s received a special rebuild to make them able to "MU" (multiple unit) with more than one other unit; originally they only had the MU cables on the rear meaning that only a back-to-back pair could be made. The two special units had cables put on the front so they could be used to make a 3-unit set for longer trains. One of the units had the nose rebuilt with an access door, raising the headlight and changing the contour of the nose.
The DL-109s eventually ran their last miles in the late 1950s in local commuter service around Boston. One special unit was retained through the 1960s in Boston as a power plant; PP-716 was converted to produce power for a test third rail in Boston. Eventually PP-716 became the last DL-109 on the face of the Earth and fell to the scrappers torch under the Penn Central.
The other railroad's DL-109s were primarily scrapped during the 1950s. One notable pair on the Milwaukee Road lived charmed lives. Units #14A, B were delivered in October 1941, and paired up to run the Chicago-Minneapolis Afternoon Hiawatha and overnight Fast Mail back to Chicago. The units, along with EMD E6 #15A, B performed wonderfully during World War II with consists of Hiawathas expanding up to 20 cars and standing room only. The paint scheme was designed by Otto Kuhler, who had designed most of the 1938 Hiawatha and EMD F7 locomotives. It had a yellow stripe up the nose and torpedo flank orange belts on the mostly grey body. This scheme did not last, and it was painted to resemble the other passenger unit EMD E6, #15A, B with the lightning bolt/grey scheme. After the War, they were repainted into the FM Erie-built locomotive scheme, and then in 1950, the Hiawatha orange-maroon band with black roof scheme.
The units on the Milwaukee logged over 3 million miles by 1953, and were overhauled. The motors and prime movers were sent to Alco for rebuilding, and the shopmen at the Milwaukee's in Milwaukee rebuilt the locomotives. They came out of the shops with facelifts, which the addition of EMD bulldog noses, and changed appearance which made them look like an EMD locomotive. The units then worked on secondary lines to Canton, South Dakota Green Bay, Wisconsin and Madison-Chicago trains until retirement; #14B was finally scrapped at Jones Island in Milwaukee in May of 1964. The Milwaukee employees called #14A "Old Maude."
[edit] Units produced
[edit] A units (cabs)
| Railroad | Quantity | Road numbers | Model |
|---|---|---|---|
| Atchison, Topeka and Santa Fe Railway |
|
50 |
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| Chicago, Milwaukee, St. Paul and Pacific Railroad |
|
14A, 14B |
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| Chicago and North Western Railway |
|
5007A |
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| Chicago, Rock Island and Pacific Railroad |
|
624 |
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| Chicago, Rock Island and Pacific Railroad |
|
622 |
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| Chicago, Rock Island and Pacific Railroad |
|
621, 623 |
|
| Gulf, Mobile and Ohio Railroad |
|
270, 271 |
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| Gulf, Mobile and Ohio Railroad |
|
272 |
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| New York, New Haven and Hartford Railroad |
|
0700–0759 |
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| Southern Railway |
|
6400, 6401 |
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| Southern Railway |
|
2904 |
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[edit] B units (cabless boosters)
| Railroad | Quantity | Road numbers | Model |
|---|---|---|---|
| Atchison, Topeka and Santa Fe Railway |
|
50A |
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| Southern Railway |
|
6425, 6426 |
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| Southern Railway |
|
2954 |
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[edit] References
- (1972). "DL109/110 Roster and Drawings." Extra 2200 South 9 (8) 19–22.
- ALCO 244 and 251 Diesel Engines. Pacific Southwest Railway Museum. Retrieved on March 9, 2006.
- Early Diesel Locomotive Engines. Will Davis. Retrieved on February 20, 2006.
- Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Kalmbach Publishing Co., Milwaukee, WI. ISBN 0-89024-026-4.
- Steinbrenner, Richard T. (2003). The American Locomotive Company: A Centennial Remembrance. On Track Publishers LLC, New Brunswick, NJ. ISBN 0-911122-07-9. pp. 174-178.
[edit] External links
- Alco DL109/110 Roster
- ALCO DL-109 Pictures from railfan.net
- ALCO DL-109: The Original Exotic Cab Unit article by Richard Biegaj.
| Diesel-electric locomotives built by ALCO | |
|---|---|
| Switchers: | HH series, S-1, S-2, S-3, S-4, S-5, S-6, T-6, SB-8/SSB-9 |
| RS series: | RS-1, RS-2, RS-3, RS-11, RS-27, RS-32, RS-36 |
| RSC series: | RSC-2, RSC-3 |
| RSD series: | RSD-1, RSD-4, RSD-5, RSD-7, RSD-12, RSD-15 |
| Cab units: | DL-103b, DL-105, DL-107, DL-109, DL-110, DL-203, FA, FB, PA, PB |
| Century series: | C415, C420, C424, C425, C430, C628, C630, C636, C855 |
| Diesel-hydraulics: | DH643 |
