| LNWR Class A | |
| Powertype: | Steam |
| Designer: | F.W. Webb |
| Builder: | LNWR at Crewe Works |
| Totalproduction: | 111 |
| Whytetype: | 0-8-0 |
| Uicclass: | D n3vG |
| Driverdiameter: | 4feet |
| Wheelbase: | 17feet |
| Fueltype: | Coal |
| Boilerpressure: | 1752NaN2 |
| Totalsurface: | 1489square feet |
| Cylindercount: | Three, compound |
| Hpcylindersize: | (2 outside) 15inches×24inchesin (×in) |
| Lpcylindersize: | (1 inside) 30inches×24inchesin (×in) |
| Valvegear: | Stephenson link motion |
| Operator: | London and North Western Railway |
| Builddate: | 1893–1900 |
| Disposition: | 15 rebuilt to Class C 1904–06 62 rebuilt to Class D 1906–09 34 rebuilt to Class C1 1909–12 |
The London and North Western Railway (LNWR) Class A was a class of 0-8-0 steam locomotives. From 1893 to 1900, Crewe Works built 111 of these engines, which had a three-cylinder compound arrangement, and were designed by Francis Webb. According to the LNWR Society, 110 were built between 1894 and 1900.[1]
Like the other Webb compounds, they proved problematic, so in 1904 George Whale began rebuilding these to simple expansion engines. Fifteen were converted to Class C between 1904 and 1906, 62 to Class D between 1906 and 1909, with the remaining 34 rebuilt by Charles Bowen Cooke to Class C1 between 1909 and 1912.
All Class D locomotives were later rebuilt to Class G1. Some of them, rebuilt to Class G2a, were still running in 1962.
The LNWR letter classification system for 8 coupled engines (A, B, C, etc.) was introduced in 1911.
. Willie Yeadon. Yeadon's Compendium of LNWR Locomotives Vol 2 Goods Tender Engines.