Caledonian 2-4-0 Locomotives in Great_Britain
Class Details by Steve Llanso of Sweat House Media
Class 197 (Locobase 7671)
Data from [
]. Works numbers were 158-163.
Class 30 (Locobase 2219)
Data from Ahrons' table of engines participating in the Newark brake trials, although he there references Fig 219, which is the Neilson engine which he credits with different data.
Benjamin Connor's works-built design. See the Neilson engine delivered at around the same time (Locobase 3507).
Valve travel in full gear measured 5" (127 mm) with an outside lap of 1 1/4" (32 mm), no inside lap, and 5/16" (8 mm) lead. At the Newark brake trials in 1875, this engine achieved 49.5 mph with a train load (including engine and tender) of 197.4 tons.
Class 30 (Locobase 3507)
This is the Neilson variant of two locomotive classes put into service and designed by B. Connor. This is clearly intended to be the faster of the two as suggested by its very tall drivers. See Locobase 2219 for the works version.
| Principal Dimensions by Steve Llanso of Middle Run Media | |||
|---|---|---|---|
| Class | 197 | 30 | 30 |
| Locobase ID | 7671 | 2219 | 3507 |
| Railroad | Caledonian | Caledonian | Caledonian |
| Country | Great Britain | Great Britain | Great Britain |
| Whyte | 2-4-0 | 2-4-0 | 2-4-0 |
| Number in Class | 6 | ||
| Road Numbers | 85-86, 89-92 | ||
| Gauge | Std | Std | Std |
| Number Built | 6 | ||
| Builder | Beyer, Peacock | St. Rollox | Neilson & Co |
| Year | 1860 | 1865 | 1868 |
| Valve Gear | Gooch | Stephenson | |
| Locomotive Length and Weight | |||
| Driver Wheelbase (ft / m) | 8.75 | 8.59 / 2.62 | |
| Engine Wheelbase (ft / m) | 15.66 / 4.77 | 15.66 / 4.77 | 15.70 / 4.79 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.56 | 0.55 | |
| Overall Wheelbase (engine & tender) (ft / m) | |||
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |||
| Weight on Drivers (lbs / kg) | |||
| Engine Weight (lbs / kg) | 80,192 / 36,375 | 80,192 / 36,375 | 73,920 / 33,530 |
| 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) | |||
| Geometry Relating to Tractive Effort | |||
| Driver Diameter (in / mm) | 74 / 1880 | 74 / 1880 | 86 / 2184 |
| Boiler Pressure (psi / kPa) | 130 / 900 | 130 / 900 | 140 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 24" / 457x610 | 17.5" x 24" / 445x610 | 17" x 24" / 432x610 |
| Tractive Effort (lbs / kg) | 11,611 / 5266.67 | 10,975 / 4978.18 | 9597 / 4353.13 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |||
| Heating Ability | |||
| Tubes (number - dia) (in / mm) | 150 - 2" / 51 | ||
| Flues (number - dia) (in / mm) | |||
| Flue/Tube length (ft / m) | |||
| Firebox Area (sq ft / m2) | 79 / 7.34 | 82.30 / 7.65 | 86 / 7.99 |
| Grate Area (sq ft / m2) | 13.80 / 1.28 | 15.10 / 1.40 | 14.40 / 1.34 |
| Evaporative Heating Surface (sq ft / m2) | 1308 / 121.56 | 781 / 72.58 | 920 / 85.50 |
| Superheating Surface (sq ft / m2) | |||
| Combined Heating Surface (sq ft / m2) | 1308 / 121.56 | 781 / 72.58 | 920 / 85.50 |
| Evaporative Heating Surface/Cylinder Volume | 185.04 | 116.89 | 145.92 |
| Computations Relating to Power Output (More Information) | |||
| Robert LeMassena's Power Computation | 1794 | 1963 | 2016 |
| Same as above plus superheater percentage | 1794 | 1963 | 2016 |
| Same as above but substitute firebox area for grate area | 10,270 | 10,699 | 12,040 |
| Power L1 | 3863 | 2862 | 4297 |
| Power MT | |||