Data from "An Old L And NWR Express Locomotive", Locomotive Magazine, Volume XXIX [29], No 371 (14 June 1923), p. 191.
LM presented a photo of the 189 in later years to celebrate driver Bowker, who served 62 years on the L&NWR before his retirement. But the essential details remained the same. A big dome, tall stack, unsheltered footplate (except for a small spectacled weatherboard), single pair of tall drivers just ahead of the firebox were typical of the time.
The outside cylinders separated the two leading carrying axle; the forward wheels under the firebox were transformed into solid discs in later years.
Data from Reder (1974) and G D Dempsey, CE & D Kinnear Clark, CE, A Rudimentary Treatise on the Locomotive Engine (London: Crosby, Lockwood & Co, 1879), p. 63.
A Crampton built for the London & Birmingham, but delivered after the L&B, Manchester and Birmingham, and Grand Junction Railway merger into the London and North Western. Notice the relatively large boiler, but small firebox.
Reached 65 1/2 mph (105 kph)and averaged 58 1/2 mph (94 kph), Wolverton to London with twelve coaches. Usual "duty" according to Dempsey & Clark, was 75 trailing tons at 55.4 mph (89 kph) for 3 miles and 55 trailing tons at 53 mph (85 kph) for 30 miles (48 km).
Unsuccessful because it was hard on tracks.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | 175 | London |
Locobase ID | 20958 | 674 |
Railroad | London & North Western | London & North Western |
Country | Great Britain | Great Britain |
Whyte | 4-2-0 | 4-2-0 |
Number in Class | 10 | 1 |
Road Numbers | 175, 182-190 | |
Gauge | Std | Std |
Number Built | 10 | 1 |
Builder | Jones & Potts | L&NW - Crewe |
Year | 1847 | 1848 |
Valve Gear | ||
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | ||
Engine Wheelbase (ft / m) | 12 / 3.66 | |
Ratio of driving wheelbase to overall engine wheelbase | ||
Overall Wheelbase (engine & tender) (ft / m) | ||
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 30,464 / 13,818 | |
Weight on Drivers (lbs / kg) | 30,464 / 13,818 | |
Engine Weight (lbs / kg) | 56,672 / 25,706 | |
Tender Loaded Weight (lbs / kg) | ||
Total Engine and Tender Weight (lbs / kg) | ||
Tender Water Capacity (gals / ML) | 2160 / 8.18 | |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||
Minimum weight of rail (calculated) (lb/yd / kg/m) | 51 / 25.50 | |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 78 / 1981 | 96 / 2438 |
Boiler Pressure (psi / kPa) | 120 / 830 | 100 / 690 |
High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 24" / 457x610 | 18" x 20" / 457x508 |
Tractive Effort (lbs / kg) | 10,169 / 4612.59 | 5738 / 2602.72 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.00 | |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 117 - 2.25" / 57 | 229 - 2" / 51 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 13.92 / 4.24 | 12 / 3.66 |
Firebox Area (sq ft / m2) | 64.70 / 6.01 | 91 / 8.46 |
Grate Area (sq ft / m2) | 12.50 / 1.16 | 21.50 / 2 |
Evaporative Heating Surface (sq ft / m2) | 1024 / 95.13 | 1529 / 142.10 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 1024 / 95.13 | 1529 / 142.10 |
Evaporative Heating Surface/Cylinder Volume | 144.87 | 259.57 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 1500 | 2150 |
Same as above plus superheater percentage | 1500 | 2150 |
Same as above but substitute firebox area for grate area | 7764 | 9100 |
Power L1 | 2974 | 5389 |
Power MT | 215.22 |