Baldwin Class 10-12-D

Baldwin Class 10-12-D
No. 778, preserved at the Leighton Buzzard Light Railway
Type and origin Power type Steam Builder Baldwin Locomotive Works Build date 1916 - 1917
Specifications Configuration: ​  • Whyte 4-6-0PT  • UIC 2′C n2t Gauge 600 mm (1 ft 11+5⁄8 in) Leading dia. 1 ft 4 in (0.406 m) Driver dia. 1 ft 11+1⁄2 in (0.597 m) Wheelbase Coupled: 5 ft 8 in (1.73 m) Loco weight 14.5 long tons (14.7 t) (see text) Fuel type Coal Fuel capacity 0.75 long tons (0.76 t) (see text) Water cap. 476 US gal (1,800 L; 396 imp gal) Boiler pressure 178 psi (1.23 MPa) Cylinders Two, outside Cylinder size 9 in × 12 in (229 mm × 305 mm) Valve gear Walschaerts (slide valves)
Performance figures Tractive effort 6,328 lbf (28.15 kN)
Career Operators War Department Light Railways, North Western Railway, Welsh Highland Railway, Glyn Valley Tramway, Snailbeach District Railways, Ashover Light Railway Nicknames 'Yankee' Preserved Nos. 608, 633 (Australia), 778, 779, 794, Current owner Ffestiniog Railway (608) Dreamworld (633) Leighton Buzzard Light Railway (778) Statfold Barn Railway (779) Welsh Highland Heritage Railway (794) Disposition 4 known preserved. 1 Preserved in rebuilt form. More known to exist abandoned.

The Baldwin Class 10-12-D was a class of narrow gauge 4-6-0PT steam locomotives built by the Baldwin Locomotive Works (USA) for the British War Department Light Railways for service in France during World War I. They were built in 1916–1917 to 600 mm (1 ft 11+5⁄8 in) gauge.