Data from William Maw and Dredge, "Carels' Passenger Engine", Engineering, Volume 15 (27 June 1873), pp. 459-460. See also Hippolyte Fontaine, Description des machines les plus remarquables et les plus nouvelles a l Exposition de Vienne en 1873 (Paris: Libraire Polytechnique, H Baudry, Libraire-Editeur, 1874), pp. 388-390.
Carels' earlier exhibition engine shown at the 1867 Paris installment is described in Locobase 12922. The 1873 entrant was bigger and had an unusual drive train. The cylinders were mounted at the level of the footplate on either side of the Belpaire firebox with the crosshead behind. These cylinders were identical in construction, that is, there wasn't a left or right cylinder.
Each cylinder's crosshead connected the piston rod to the top end of a walking beam that pivoted around a fulcrum on the frame behind the footplate. A rod extended forward from the bottom end of the beam and drove the trailing axle. An external steam pipe fed each slide valve. Steam admission through a form of Walschaert's valve gear and two rocking shafts.
Maw and Dredge repeat the the advantages claimed by the layout, but choose not to comment. Placing the cylinders at the frame level put them closer to the driver and allowed close inspection; they were also much farther away from dust. Piston rod and connecting rod moved in opposite directions at the same time, which balanced the reciprocating parts, and wheel replacement was much simpler.
NB: Heating surface areas in the specifications are given in the original as derived from the water-side diameter of the tubes. Fire-side tube area was 1,072 sq ft (99.63 sq m ) for the tubes, 1,190 sq ft (110.55 sq m) for the total.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 13213 |
| Railroad | Grand Central |
| Country | Belgium |
| Whyte | 0-6-0T |
| Number in Class | |
| Road Numbers | |
| Gauge | Std |
| Number Built | |
| Builder | Carels |
| Year | 1873 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 14.11 / 4.30 |
| Engine Wheelbase (ft / m) | 14.11 / 4.30 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 14.11 / 4.30 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 83,776 / 38,000 |
| Engine Weight (lbs / kg) | 83,776 / 38,000 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 47 / 23.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 66.90 / 1700 |
| Boiler Pressure (psi / kPa) | 130.50 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17.72" x 23.62" / 450x600 |
| Tractive Effort (lbs / kg) | 12,297 / 5577.83 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.81 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 226 - 1.772" / 45 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.48 / 3.50 |
| Firebox Area (sq ft / m2) | 117.50 / 10.92 |
| Grate Area (sq ft / m2) | 32.93 / 3.06 |
| Evaporative Heating Surface (sq ft / m2) | 1309 / 121.65 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1309 / 121.65 |
| Evaporative Heating Surface/Cylinder Volume | 194.16 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4297 |
| Same as above plus superheater percentage | 4297 |
| Same as above but substitute firebox area for grate area | 15,334 |
| Power L1 | 4093 |
| Power MT | 323.13 |