| LNWR Improved Precedent Class | |
|---|---|
| Power type | Steam |
| Designer | F.W. Webb |
| Builder | Crewe Works |
| Build date | 1882–84 |
| Total produced | 30 |
| Configuration | 2-(2-2)-0 |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
| Fuel type | Coal |
| Cylinders | Three |
| Career | LNWR |
| Withdrawn | 1903–1904 |
| Disposition | All scrapped |
The Experiment Class was a series of 30 three-cylinder 2-(2-2)-0 compound locomotives designed by Francis Webb for the London and North Western Railway between 1882 and 1884. They were Webb’s first large-scale experiment with a class of express compound locomotives, and the first engine was named accordingly. The experiment was not a success and they were quickly withdrawn by Webb's successor George Whale soon after he took up office in 1903.