Data from "2/4 gek. Schnellzug-lokomotive fur normale Spurweite", Locomotiven, A Borsig (Tegel bei Berlin, 1898), archived on Historical Railway Images, Flickr, at [], p. 12, last accessed 8 July 2022. Works numbers were 3753-3758 in March 1881.
Described in the catalogue as a "fast express" locomotive, this sextet operated in northern Italy. (Locobase hasn't worked out why the Borsig production compilation identifies the railway as the Oberschlesische, which translates as Upper Schleswig.)
Data from users.libero.it/allesandro.tuzza/fonti/sfr/1879sfrindice.htm (8 July 2004), an 1878 album of locomotives for the SFR reproduced by Allesandro Tuzza. (later cite: [], Tavola 5)
These were two Norris engines with non-sequential works numbers (351 & 358). they had the classic Norris look of haystack firebox behind a long boiler with the two carrying axles clumped together under the stack. The inclined cylinders drove on the first axle.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | 495 | 61 |
Locobase ID | 21044 | 6235 |
Railroad | Strade Ferrate Romane | Strade Ferrate Romane (SFR) |
Country | Italy | Italy |
Whyte | 4-4-0 | 4-4-0 |
Number in Class | 6 | 2 |
Road Numbers | 495-500 | 61-62 |
Gauge | Std | Std |
Number Built | 6 | 2 |
Builder | Borsig | Norris |
Year | 1882 | 1846 |
Valve Gear | Allan | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | ||
Engine Wheelbase (ft / m) | ||
Ratio of driving wheelbase to overall engine wheelbase | ||
Overall Wheelbase (engine & tender) (ft / m) | ||
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 17,637 / 8000 | |
Weight on Drivers (lbs / kg) | 35,053 / 15,900 | |
Engine Weight (lbs / kg) | 87,523 / 39,700 | 48,171 / 21,850 |
Tender Loaded Weight (lbs / kg) | 52,911 / 24,000 | 32,298 / 14,650 |
Total Engine and Tender Weight (lbs / kg) | 140,434 / 63,700 | 80,469 / 36,500 |
Tender Water Capacity (gals / ML) | 2112 / 8 | 1241 / 4.70 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6.60 / 6 | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 29 / 14.50 | |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 72.80 / 1850 | 60.10 / 1527 |
Boiler Pressure (psi / kPa) | 145 / 1000 | 87 / 600 |
High Pressure Cylinders (dia x stroke) (in / mm) | 17.05" x 24.02" / 433x610 | 14" x 22" / 356x558 |
Tractive Effort (lbs / kg) | 11,822 / 5362.38 | 5306 / 2406.76 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.61 | |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 126 - 1.772" / 45 | |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 11.98 / 3.65 | |
Firebox Area (sq ft / m2) | 45.95 / 4.27 | |
Grate Area (sq ft / m2) | 21.64 / 2.01 | 9.47 / 0.88 |
Evaporative Heating Surface (sq ft / m2) | 980 / 91.06 | 761 / 70.73 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 980 / 91.06 | 761 / 70.73 |
Evaporative Heating Surface/Cylinder Volume | 154.39 | 194.15 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 3138 | 824 |
Same as above plus superheater percentage | 3138 | 824 |
Same as above but substitute firebox area for grate area | 3998 | |
Power L1 | 2203 | |
Power MT | 277.11 |