PROTOTYPE Hinkley Locomotive Works, Boston, 1878 Gauge of track 2-ft "Forney"Tank Locomotive SCALE 1/3.2 GAUGE 7-1/2" (190.5mm), 7-1/4" (184.Imm) DRIVING WHEELS Diameter 220mm (8-21/32") CYLINDERS Bore :65mm (2-9/16") or 60mm (2-23/64") Stroke 110mm (4-21/64") Drain:4 cocks (hand) SLIDE VALVES Travel 20mm (25/32") Steam Lap 4mm (5/32") Exhaust Lap 0.5mm (1/64") Port Opening 6mm (15/64") VALVE GEARS STEPHENSON'S type BOILER Material : All copper, silver soldered throughout Twin pop type safety valves Hydraulic test pressure : 16kg/cm2 (228lbs/in2) Working pressure (MAX) : 8 kg/cm2 (114 lbs/in2) Water capacity : Approx. 33 lit. (8.7 U.S. gal.) Grate area : 225mm x 265mm (8-55/64' x l0-7/16') Fuel : Coal or Liquefied petroleum gas Regulator : Push & Pull Lever Type Superheater : Outer dia. 8mm stainless steel tubes 8 pcs. Water Supply System Axle driven double acting pump :O 18mm x 28mm stroke (O 23132' x 1-7/64' stroke) Double acting hand pump : O 22mm x 33mm stroke (O 7/8' x 1-19/64" stroke) Injector : Dry range 3 ~ 5.5 kg/cm2 (43 ~ 78 Ibs/in2) Capacity 2000 cc/min. (70 oz./min.) Equipped with Pressure gauge Water pump : Westinghouse air compressor type O 13.4mmx 30mm stroke (O 17/32" x 1-3/16' stroke) Capacity 800 cc/min. (28 oz./min.) Feed water heater : Copper tubes 4 pcs. O.D. 12.5mm x 550mm (O.D. 1/2' x 21-21/32') LUBRICATORS For cylinders : Mechanical twin ram type O 3mm x 6.6mm stroke (D.118"x 1/4")stroke) x 2 Ratchet 34 teeth feeding Recommended oil : Steam oil Oil tank capacity : 260 cc (9 oz.) STEAM WHISTLE 4 note chime BREAK Hand BALL BEARINGS & NEEDLE BEARINGS 17 pcs. employed in all. WEIGHT (DRY) Engine : approx. 300 kg (661 lbs.) Tender : 50 kg (110 lbs.) Water tank capacity 30 lit. (7.9 U.S. gal.) SIZE Engine Length 1660mm (64-23/64') Width 560mm (22-3/64') Height 867mm (34-9/64') Wheel bases 710mm (27-61/64') Tender Length 1400mm (55-1/8') Width 47Dmm (18-1/2') Height 360mm (14-11/64') Wheel bases 1140mm (44-7/8') MINIMUM RADIUS 7.5m