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 | |