GER Classes S46, D56 and H88
D16/3 'Super Claud' 4-4-0 No. 62530 departs March in August 1958.
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| Type and origin | |
|---|---|
| Power type | Steam |
| Builder | Stratford Works |
| Build date | 1900-1923 |
| Total produced | 121 |
| Specifications | |
|---|---|
| Configuration | 4-4-0 |
| UIC class | 2′B n2, 2′B h2 |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
| Driver dia. | 7 ft (2.1 m) |
| Length | 53 ft 4 3⁄4 in (16.275 m) |
| Loco weight | 52.2–55.9 long tons (53.0–56.8 t) |
| Fuel type | Coal |
| Firebox: • Firegrate area |
21.3 sq ft (1.98 m2) |
| Boiler pressure | 180 psi (1,200 kPa) |
| Cylinders | Two inside |
| Cylinder size | 19 in × 26 in (480 mm × 660 mm) |
| Performance figures | |
|---|---|
| Tractive effort | 17,095 lbf (76,040 N) |
| Career | |
|---|---|
| Operators | |
| Power class | BR: 2P (3P for D16/3 from 1953) |
| Axle load class | LNER/BR: RA 5 |
| Disposition | All original locomotives scrapped, replica being constructed. |
The GER Classes S46, D56 and H88 (classified Classes D14, D15, and D16 by the London and North Eastern Railway) were three classes of similar 4-4-0 steam locomotive designed by James Holden (S46 and D56) and A. J. Hill (H88) for the Great Eastern Railway. They were given the nickname Claud Hamilton after the first engine of the class, named after Lord Claud Hamilton (1843–1925) the chairman of the Great Eastern Railway. None of these locomotives survived to preservation.
Allen (1961) noted that
"Of all the locomotive designs that emerged from Stratford Works during the reign of James Holden, the one destined to achieve the greatest fame, beyond question, was his Claud Hamilton type 4-4-0, of which the pioneer example, No. 1900 Claud Hamilton, took the rails in 1900"
He devotes a whole chapter to it. It is widely considered one of the classic locomotive designs, and three later Great Eastern Railway classes and three LNER classes were descended from it.F.V. Russell (Holden's Chief Designer) is generally accepted as the Claud Hamiltons' actual designer. Ellis notes:
"Mr Holden, by then a valetudinarian was making a long recuperative stay in Egypt".
This was related to Ellis by Russell.
The classification of the Claud Hamiltons is complex but is summarised here:
The S46 boiler had 1,630 sq ft (151 m2) of heating surface, with a 21.3 sq ft (1.98 m2) grate. The cylinders were 19 x 26 in. with flat valves placed below, operated by Stephenson's motion. The coupled wheels were 7 ft (2.1 m) in diameter.
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