| USATC S118 class | |
| Powertype: | Steam |
| Builder: | American Locomotive Company (338), Baldwin Locomotive Works (253+33), Davenport Locomotive Works (67+6), H.K. Porter, Inc. (25+5), Vulcan Iron Works (58+8) |
| Builddate: | 1942–1945 (for USATC), 1945–1948 (copies) |
| Totalproduction: | 741 for USATC, 52 copies |
| Whytetype: | 2-8-2 |
| Uicclass: | 1′D1′ h2 |
| Gauge: | |
| Leadingdiameter: | 260NaN0 |
| Driverdiameter: | 480NaN0 |
| Trailingdiameter: | 300NaN0 |
| Length: | 59feet |
| Weightondrivers: | 80000lb |
| Locoweight: | 119000lb |
| Tenderweight: | 96700lb |
| Fueltype: | Coal or fuel oil |
| Fuelcap: | 18000lb |
| Watercap: | 5000usgal |
| Firearea: | 27.7square feet |
| Tubesandflues: | 1256square feet |
| Fireboxarea: | 115square feet |
| Totalsurface: | 1371square feet |
| Superheaterarea: | 374square feet |
| Boilerpressure: | 1852NaN2 |
| Cylindercount: | Two, outside |
| Cylindersize: | 16x |
| Valvegear: | Indirect Walschaerts |
| Tractiveeffort: | 201001NaN1 |
| Factorofadhesion: | 3.98 |
| Operator: | USATC |
| Fleetnumbers: | 3000–3029, 130–249, 257–639, 661–788, 811–890 |
| Locale: | North America, South America, North Africa, West Africa, East Africa, Middle East, South and South East Asia, Australia |
The United States Army Transportation Corps (USATC) S118 Class is a class of 2-8-2 steam locomotive. Built to either, or gauge, they were used in at least 24 different countries.
Based on Australia's new C17 class locomotives, their specifications were forwarded to the United States where the United States Army Transportation Corps (USATC) drew up plans for a 2-8-2 with specifications similar to a C17 class. 741 were built in the period late 1942–1945 with a further 52 appearing between 1945 and 1948. They were built by Baldwin (253+33), Alco (338), Porter (25+5), Davenport (67+6) and Vulcan (58+8) in the United States. The first thirty were numbered 3000–3029, with subsequently locomotives numbered 130–249, and 257–889. Locomotives 640–660 and 789–810 were cancelled.
The S118 class were the most widespread of all the locomotives of the Second World War. The first twenty locomotives (3000–3019) were sent to Nigeria. Eleven, (190–200), were converted to gauge by putting 31NaN1 wide spacers (rings) between the wheels and the truck side frames on same length axles, and delivered to the White Pass and Yukon Route in Alaska. Twenty (216–235) were delivered to Queensland where they formed the Queensland Railways AC16 Class. Others were sent to North Africa, Gold Coast, Iraq, India, and Burma.
After the war, surplus locomotives were sold to Malaya, the Philippines (as Manila Railroad 850 class),[1] Siam, Cambodia, Cameroun, Tanganyika,[2] and the United Fruit Company operations in Costa Rica and Honduras.
Baldwin built 33 copies for the Indian Railways, Porter built two for the Chemins de Fer des Grands Lacs in the Belgian Congo, Vulcan built a batch of eight for the Piraeus, Athens and Peloponnese Railways (SPAP) in Greece (class Δ). Davenport built six with a higher boiler pressure for the Chemin de Fer Franco-Ethiopien de Djibouti á Addis-Ababa.
Several S118 locomotives still exist:
| No. | Builder | Post WW2 Owner | Current Owner | Location | Status | Image | Notes |
|---|---|---|---|---|---|---|---|
| 190 | Baldwin 69425 | White Pass and Yukon Route | Tweetsie Railroad |  Blowing Rock, North Carolina, United States | Operational | Named "The Yukon Queen". | |
| 192 | Baldwin 69427 | White Pass and Yukon Route | Dollywood | Pigeon Forge, Tennessee, United States | Operational | Named "Klondike Katie". | |
| 195 | Baldwin 69430 | White Pass and Yukon Route | City of Skagway | Skagway, Alaska, United States | Displayed | ||
| 218 | Baldwin 69453 | Queensland Railways | Zig Zag Railway |  Lithgow, New South Wales, Australia | Under overhaul | Named "The Yank" | |
| 221 | Baldwin 69456 | Queensland Railways | Queensland Rail | Ipswich, Queensland, Australia | Operational | Mainline Certified | |
| 1798 | Baldwin 74011 | Northeast Frontier Railway |  New Jalpaiguri, India | Operational | Post war copy | ||
| Δ-101 | Vulcan 4700 | Piraeus, Athens and Peloponnese Railways | OSE |  Myloi, Greece | Dumped | Post-war copy, later SEK No. 7101 | |
| Δ-102 | Vulcan 4701 | Piraeus, Athens and Peloponnese Railways | OSE | Myloi, Greece | Dumped | Post-war copy, later SEK No. 7102 | |
| Δ-103 | Vulcan 4702 | Piraeus, Athens and Peloponnese Railways | OSE | Myloi, Greece | Dumped | Post-war copy, later SEK No. 7103 | |
| Δ-104 | Vulcan 4703 | Piraeus, Athens and Peloponnese Railways | OSE | Kalamata, Greece | Displayed | Post-war copy, later SEK No. 7104 | |
| Δ-105 | Vulcan 4704 | Piraeus, Athens and Peloponnese Railways | OSE | Kalamata, Greece | Dumped | Post-war copy, later SEK No. 7105 | |
| Δ-106 | Vulcan 4705 | Piraeus, Athens and Peloponnese Railways | OSE | Tripolis, Greece | Dumped | Post-war copy, later SEK No. 7106 | |
| Δ-107 | Vulcan 4706 | Piraeus, Athens and Peloponnese Railways | OSE | Myloi, Greece | Dumped | Post-war copy, later SEK No. 7107 | |
| Δ-108 | Vulcan 4707 | Piraeus, Athens and Peloponnese Railways | OSE | Corinth, Greece | Stored | Post-war copy, later SEK No. 7108 | |