Data from "New 0-6-2 Tank Locomotive, Glasgow & South Western Ry.", Volume XXVI [26], No 330 (14 February 1920), pp. 140-141. Works numbers were 22070-20072 in May 1919, and 22075-22079 in June.
Locobase 20469 describes superintendent Peter Drummond's class 45- eighteen radial tanks, which introduced the 0-6-2T arrangement to the G&SW. The need for locomotives to handle the heavy goods and mineral traffic in the Ayrshire coalfields didn't diminish, so new superintendent Robert Whitelegg tweaked Drummond's design, the biggest difference being a 9" (229 mm) reduction in the adhesion wheelbase. He ordered ten from the big Glasgow builder and assigned them to the G&SW's Ayr, Ardrossan, and Glasgow districts.
Like the 45s, the 1 class was "found to do exceedingly good work, having rapid acceleration and large hauling capacity."
Data from "Six-Coupled Radial Tank Locomotive, Glasgow & South Western Ry" The Locomotive Magazine, Volume XXII [22] (15 April 1916), pp. 65-66 and "New 0-6-2 Tank Locomotive for the Glasgow & South Western Ry." (15 July 1916), pp. 140-141. Works numbers were 21242-21245 in December 1915, 21246-21247 in January 1916, 21507-21508 in May 1917, 21509-21518 in June..
LM reported that this class, designed by locomotive superintendent Peter Drummond, was intended for the "heavy goods and mineral traffic on the branch lines south and east of Ayr, where the loads are heavy and gradients steep." They were reportedly based on Drummond's 0-6-4 tanks of the Highland Railway (Locobase 10726). Trailing radial trucks coped with the tight curves by employing 4" (102 mm) of lateral play. All-inside motion drove on the middle axle.
Robert Whitelegg would order ten more in 1919; see Locobase
A consistent verdict on their performance is that they were successful, but always limited by the water tankage, which was spread among three tanks. 600 Imperial gallons (720 US gallons) rode in the hind tank under the 3 long tons of coal. Two more 600 Imp gal tanks flanked the boiler. But once the class transferred to the London, Midland & Scottish (LMS) at grouping in 1923, the water shortage limited the locomotives' inherent capability to handle still-heavier trains.
Retirements occurred over a long period . Starting with 16916 in February 1936, thirteen were withdrawn before World War Two began in Europe in September 1939. Two (16910 and 16903) went to Robert McAlpine & Sons and renumbered them 80-81. in 1936 while Ashington Coal Company bought 16904 and 16908 as their 1-2. The other ten were gradually phased out over the next 9 years. Four continued in industrial roles.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | 1 | 45/1 |
Locobase ID | 20611 | 20469 |
Railroad | Glasgow & South Western | Glasgow & South Western |
Country | Great Britain | Great Britain |
Whyte | 0-6-2T | 0-6-2T |
Number in Class | 10 | 28 |
Road Numbers | 1-10/16400-16427/16900-16927 | 45, 84, 90-91, 122, 184+/16900-16927 |
Gauge | Std | Std |
Number Built | 10 | 28 |
Builder | North British | North British |
Year | 1919 | 1916 |
Valve Gear | Stephenson | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 15 / 4.57 | 15.75 / 4.80 |
Engine Wheelbase (ft / m) | 22.75 / 6.93 | 22.75 / 6.93 |
Ratio of driving wheelbase to overall engine wheelbase | 0.66 | 0.69 |
Overall Wheelbase (engine & tender) (ft / m) | 22.75 / 6.93 | 22.75 / 6.93 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 39,368 / 17,857 | |
Weight on Drivers (lbs / kg) | 116,928 / 53,038 | 112,000 / 50,802 |
Engine Weight (lbs / kg) | 149,968 / 68,024 | 145,600 / 66,043 |
Tender Loaded Weight (lbs / kg) | ||
Total Engine and Tender Weight (lbs / kg) | 149,968 / 68,024 | 145,600 / 66,043 |
Tender Water Capacity (gals / ML) | 2160 / 8.18 | 2160 / 8.18 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.30 / 3 | 3.30 / 3 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 65 / 32.50 | 62 / 31 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 60 / 1524 | 60 / 1524 |
Boiler Pressure (psi / kPa) | 180 / 1240 | 180 / 1240 |
High Pressure Cylinders (dia x stroke) (in / mm) | 18.25" x 26" / 464x660 | 18.25" x 26" / 464x660 |
Tractive Effort (lbs / kg) | 22,082 / 10016.24 | 22,082 / 10016.24 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.30 | 5.07 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 227 - 1.75" / 44 | 227 - 1.75" / 44 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 11 / 3.35 | 11 / 3.35 |
Firebox Area (sq ft / m2) | 110 / 10.22 | 118.12 / 10.97 |
Grate Area (sq ft / m2) | 22.50 / 2.09 | 22.50 / 2.09 |
Evaporative Heating Surface (sq ft / m2) | 1254 / 116.50 | 1262 / 117.24 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 1254 / 116.50 | 1262 / 117.24 |
Evaporative Heating Surface/Cylinder Volume | 159.30 | 160.32 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 4050 | 4050 |
Same as above plus superheater percentage | 4050 | 4050 |
Same as above but substitute firebox area for grate area | 19,800 | 21,262 |
Power L1 | 4125 | 4236 |
Power MT | 233.32 | 250.15 |