Hunslet Large Quarry Class
| Hunslet Large Quarry Class | |
|---|---|
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Sybil Mary guest on the Vale of Rheidol Railway
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| Number: | 6 (+ 1) |
| Manufacturer: | Hunslet |
| Year of construction (s): | 1904-1909 (1912) |
| Retirement: | 1950s |
| Type : | B n2t |
| Gauge : | 578 mm (597 mm) |
| Length over buffers: | 4,216 mm |
| Width: | 1,626 mm |
| Total wheelbase: | 1,219 mm |
| Service mass: | 7.7 t |
| Friction mass: | 7.7 t |
| Driving wheel diameter: | 508 (514) mm |
| Cylinder diameter: | 191 mm |
| Piston stroke: | 254 mm |
| Boiler overpressure: | 96.5 N / cm² |
| Water supply: | 0.68 m³ |
The six vehicles of Large Quarry Class of Hunslet are narrow-gauge tank locomotives that for operation in the Penrhyn quarry in Wales were built. Hunslet delivered a largely identical locomotive to a granite quarry also located in Wales.
history
The first locomotive, called Hugh Napier , was delivered in 1904. Five more with the names Pamela , Sybil Mary , George Sholto , Gertrude and Edward Sholto followed between 1906 and 1909. They were the last locomotives delivered by Hunslet to the Penrhyn quarry.
Like the smaller Small Quarry Class , the locomotives were used in the galleries inside the quarry, where they brought the wagons with the broken rock to the inclined lifts or for further processing and the unneeded material to the spoil heaps.
In 1912, Hunslet delivered a largely identical locomotive to the Yr-Eifl granite quarry near Trefor in north-west Wales. The machine, called Betty , was used on the approximately 1.8 km stretch between the quarry and the port, but not in the quarry itself.
The Pamela locomotive was significantly rebuilt in 1951: the boiler had to be scrapped, and instead the locomotive received the boiler and cab of a Hudswell-Clarke locomotive and a matching saddle tank. The appearance of the locomotive changed considerably due to the higher boiler and the different shape of the water tank. It was used in this form in Port Penrhyn for a few years until it returned to the quarry in 1954.
All six Penrhyn locomotives were retired in the second half of the 1950s.
technology
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Despite their designation, which only serves to distinguish them from the Small Quarry Class, the “large” class locomotives are also relatively small and light machines; their total weight is only 7.6 t. The locomotives are identical in structure and in most dimensions to the older Port Class , but the heating surface and pressure of the boiler are slightly larger, and the cylinder diameter has been increased by half an inch from 178 to 191 mm.
Externally, the two classes can best be distinguished from the driver's cab, the floor of which is lowered in the Port Class compared to the circulation, but not in the Large Quarry Class. In addition, the boiler was raised a little.
The Betty had, unlike the Penrhyn machines, a driver's cab and four instead of two sand container .
Whereabouts
All six machines in the Penrhyn quarry have been preserved. The George Sholto , renamed Bill Harvey in 1997 , and the Hugh Napier are in working order; three more are currently being restored. Gertrude was exhibited with the cauldron cut open at the Ontario Science Center in Toronto and was repatriated by the Statfold Barn Railway .
The Betty of the Yr Eifl quarry was sold in 1940, repaired on behalf of the Ministry of Supply and relocated to a quarry in Oxfordshire (where the WHR Russell locomotive was also used temporarily). In 1949 Betty was scrapped.
Overview
| Work no. | Construction year | Names | Current location | Status |
|---|---|---|---|---|
| 855 | 1904 | Hugh Napier | Penrhyn Castle | operational |
| 920 | 1906 | Pamela | Old Kiln Light Railway | is currently being restored |
| 921 | 1906 | Sybil Mary | Statfold Barn Railway | operational |
| 994 | 1909 | George Sholto (Bill Harvey) | Bressingham Steam and Gardens | operational |
| 995 | 1909 | Gertrude | Statfold Barn Railway | Buyback from the Ontario Science Center , boiler cut open |
| 996 | 1909 | Edward Sholto | Moseley Railway Trust | reimported from the USA, operational |
| 1101 | 1912 | Betty | Scrapped in 1949 |
literature
- Cliff Thomas: Quarry Hunslets of North Wales , Oakwood Press, 2004, ISBN 0-85361-575-6
Individual evidence
- ↑ The Restoration of the Hugh Napier
- ↑ Video of one of the first test drives after the restoration
- ↑ The Old Kiln Light Railway ( Memento of the original from May 3, 2009 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
