Last Updated
R.o.B Incline Railways
The
Including:
The Padarn Railway
The
The Bangor & Caernarvon Railway
The Caernarvonshire Railway
(
The Nanttle Railway
The
The main line of the tramway was re-built in 1843 for locomotive use at a cost of 35,000 pounds to create the Padarn railway of 4' gauge and 8 miles long a locomotive working to the top of an incline 800 yds long with the wagon connected to a continuous chain 1600 yards long to lower them down the gradient. The name Padarn Railway for the new line due to its running alongside the Llanberis lakes for three miles especially Lake Padarn. Despite the change in gauge the wagons of the former narrow gauge tramway remained in use in the quarries where it was impractical to use the larger gauge. The wagons in the quarry were pushed by hand to steep inclines where they were formed in to short trains of 4 wagons to be lowered down the valley face by gravity worked rope incline the quarry consisting of different levels. At the bottom of the incline they were loaded on to 4' gauge wagons for dispatch along the main line to Port Dinorwic. From 1870 shunting was worked by steam locomotives in the main galleries though the actual shunting of wagons at the work face remained human operated. With the change of gauge on the main line two 0-4-0 outside cylinder steam tender locomotives were ordered from S Horlock & Co of Northfleet Ironworks, Kent. These locomotives employed screw reversing gear with the valve gear driven of the front axle of the long wheelbase, the boiler and cylinders lagged with wood. The only braking was on the tender with sanding equipment fitted to the rear wheels which were sited behind the firebox. One of the locomotives No.1 'Fire Queen' was later preserved by the National Trust at Penrhyn Castle Museum which has an industrial railway section containing some of the locomotives that once operated on the Padarn railways, the other No.2 'Jenny Lind' cut up for scrap when both were withdrawn in 1886. To replace the two locomotives three 0-6-0T's were purchased from the Hunslett Engine Co of Leeds between 1881 and 1895, these locomotives could be detached from their train automatically by use of a lever on the footplate, the main line operating under one engine in steam principle with one on standby and the other under repairs. To maintain its fleet of locomotives the company developed works at Llanberis and Port Dinorwic which even maintained some of the boilers for the Snowdon Mountain Railway Engines. Most of the engines used in the galleries were again by the Hunslett with 18 supplied between 1870 and 1904 all saddle tanks with 'Sybil' being provided by Bagnall in 1906. A 12 ton 4 cylinder petrol locomotive built by Hardy Motors Ltd was tried out on the 4' gauge line in 1925.
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An example of the Inclines at use at the quarry.

Dolbadarn at Llanberis station.
Picture Courtesy of Mick Knapton
The next railway to reach Llanberis was the single line Caernarvon & Llanberis Railway opened in 1869 as a branch of the Bangor & Caernarvon Railway (B&CR) also known as the Caernarvonshire Railway (CR). The B&CR opened its single line from

The Festiniog Railways 'Prince' departs Caernarvon station on the New section of the Welsh Highland Railway.
The CR was authorised under and act of Parliament on 29th July 1862 to build a 27 3/4 mile long standard gauge railway between Portmadoc and the B&CR the course of this new route following much of the NR. In the same year the Pen-yr-Orsedd slate quarry saw a branch opened to the NR and by 1864 10,000 tons of slate was being transported along the branch to the Nantlle line. The tramway was laid throughout the quarry workings using the 3' 6" gauge of the Nantlle but also some sections of 2' gauge for the narrower work faces with this latter gauge used until the end of quarrying in 1979. The connection to the Nantlle line having been closed in 1963 transshipment having taken place from the narrow gauge wagons to the standard gauge main line since the NR's conversion to the standard gauge. These quarries were the last to be in commercial use in

Snowdonia National Park.
Picture courtesy freefoto.com
With the opening of the C&LR the opportunity arose for people to visit the

Picture courtesy AM Hurrell
This system has vertical steel plates in the centre of the track parrallel to the running rails with teeth machined in to them at specific equal distances apart which allow pinion teeth on a geared wheel on the locomotives driving axle to engage with them in a much smoother manner than the Riggenbach system. The rack is laid with two separate rack rails next to each other to ensur that the locomotive always has pinion teeth connected with the rail. The pinion wheels can be mounted on the same axle as the rail wheels or driven separately, in this case the pinion is driven off the axle, the outside running wheels acting as supports for the weight of the engine. The running rails were laid to a gauge of 2' 7 1/2" as reccomended by Abt himself. Work on the 4 mile long lines constuction which has an average gradient of 1:7.86 with the steepest gradient at 1:5.5 started on 15th December 1894 with the possibility of electric traction being employed as an alternative to steam or alongside steam operation. To help with the lines construction three steam locomotives were ordered from the Swiss Locomotive and Machine Co of Winterthur, and five carriages from the Lancaster Carriage & Wagon Co Ltd locomotives No. 1 'Laddas' and No.2 'Enid' and No.3 'Wyddfa' arriving in 1895 with another two and No.4 'Snowdon' and No.5 'Moel Siabod' arriving in 1896, the first three locomotives playing an important role in the building of the line. These engines were of a similar design to one another each having 6 wheels and long side tanks with their boilers inclined downwards at a 9 degree angle towards the smokebox to keep water over the firebox crown as it ascended and descended the gradients the type often referred to as 'kneeling cow' design. These engines worked on saturated steam and slide valves with their side tanks extending along the boiler as far as the buffer beam each tank having two compartments, the smallest in front holding water for compression-cooling the rear one in addition to the well tanks are for boiler feed. It is very difficult to classify these engines under the normal Whyte system as the driving pinions are sited on the axles and are connected the running rail wheels as mentioned above run freely and only provide support for the engines weight and guidance. The locomotive builders guaranteed that the engines could propel 18 tons up a 1:5.5 gradient at a speed of 4.2mph, when the descent is carried out the locomotive is pushed by the carriage counteracting this by using a counter pressure air brake the flap for the chimney being swung over to cover it over minimising the draught through the fire to keep it good for the next run. There are three braking systems for the trains operated by hand steam and air with the maximum line speed at 5mph the locomotive and carriage never coupled and having learnt from the experience of the opening day only one coach trains are operated. The coaches were a plain design with no windows though they did have canvas curtains, and were built to a swiss design, the open sided nature to minimise the potential of the carriage being blown of the track by gale force winds, each able to accommodate 54 passengers and a guard, each carriage having its own set of pinions and automatic air brakes to stop the carriage rolling away in an emergency and if the trains speed exceeds 7.5mph the brakes automatically apply. Four goods wagons that were to be used for the lines construction and later for transporting baggage and supplies to the hotel, though with little use they were allowed to rot away.

Picture courtesy Snowdon Mountain Railway.
The laying of Abt track has to be very precise and can only be achieved by continous laying from one end of the line to the other meaning that there was often delay in laying the track as earth works were completed this being the case with the construction of the higher of the two viaducts on the railway. The railway was single track throughout with passing loops at Henton, Halfway and Clogwyn with little or no signalling as it was found to be unnescesary though in the 1930's some lower quadrant semaphore signalling that had been installed on the line in 1896 was removed. The line consists of only 11 sets of points which is beneficial in a financial and practical sense as pointwork is very difficult to lay and maintain on Abt track. On the level sections only one rack rail is required but on th inspection pits at the shed this has to be kept in place to allow the engine to move. To reduce the time lost on mornings and evenings by the workmen returning to the village through the week huts were built on along the route their having to walk down to the village for entertainment at a weekend. By the April of 1895, two hundred workers were building the line in the hope that construction completed by the 1st of July but with 4 1/4 miles of track laid in 72 days the summit was only reached on 6th January 1896. The first passenger train on the railway was on the 9th January 1896 taking directors and other guests up to the summit the journey taking 1 hour and 12 minutes. The railway opening for public operation on 6th April 1896 with an order already placed for two more locomotives, the first train formed of only one coach proppelled up the railway as was to become the standard practice with the engine not coupled to the carriage for safety reasons, the next train did have towo coaches due to the amount of people wanting to travel on the railway. Both trains reached the terminus safely but in the return journey with No.1 'Ladas' leading its two coach train a mist descended on the mountain. On approach to Glogwyn station the train lurched with the carriages gaining speed seeing two passengers jump out in panic the railways General Manager quickly applying the carriage brakes to bring the train to a stop. Upon investigation it was found that there was in fact no locomotive at the head of the train it having de-railed and fallen down the side of the mountain, the driver and fireman having managed to jump out in time. This was not the end though as the following train hauled by No.2 'Enid' descended the line at caution but with the fog ploughed in to the back of the stationary coaches which were fortunately empty. No further public services were operated until the investigation was completed, which showed there was no clear evidence as to why the accident had occurred, though it was assumed it was down to some minor subsidence of the track. This saw the introduction of guide rails laid either side of the running rails with grippers fitted beneath the locomotives and carriages , the re-opening of the line taking place on 19th April 1897.

A train descends from summit, note the open sided carriage and chimney closed.
Picture Courtesy Snowdon Mountain Railway.
The railway continued in service from that time right the way through WW1 with no problems though there was a limited service due to the war with a growth in visitors once the war had ended. To cope with the demand three new locomotives were ordered from Winterthur along with four more carriages in the early 1920's with the first engine to arrive being No.6 'Sir Harmood' in 1922 followed by No.7 'Ralph' and No.8 'Eryri' these two arriving in 1923. These engines were different to the initial batch as they are superheated, have piston valves and have shorter tanks which are used for boiler feed only, the water for compression cooling being taken from the boiler, Nos. 7 & 8 both have deep well tanks which mean they do not need to stop on route to take on water, which the others do. On 15th May 1928 the became the Snowdon Mountain Railway Ltd. With WW2 the line was little affected for most of the war a normal service operating up to 1941 but due to a ministry of supply experiment services were restricted to twice daily trains on a weekday with no services throughout 1944. Normal traffic resumed on 4th May 1945 the only problem being the track and locomotives were in need of repair but with the lack of resources this proved difficult, No.4 having already being withdrawn from traffic in 1939 provided parts for the other engines until work could take place on its overhaul in 1961. The time was taken to convert the semi open carriages to all enclosed to provide a more comfortable ride for the more discerning passengers, with one coach per year being re-fitted with all seven complete by 1957, the last 1895 carriage being scrapped as beyond repair. On 31st December 1951 the Snowdon Mountain Railway Ltd released itself from the hotel lease at Llanberis to concentrate more on the hotel at the summit and railway operation, work on upgrading the hotel at summit taking place in 1952. That year an RAF Anson aircraft crashed on the railway just above Clogwyn station stranding a train load of passengers that was descending the line stranding the passengers over night. The mid 1950's saw both No.4 'Snowdon' and No.2 'Enid' out of action though the latter engine was dispatched to Leeds and the Hunslett engine works for a full overhaul in 1958 bringing it back in to traffic. From 1960 the track was renewed at the Llanberis end much of it having been the original infrastructure from when the line opened with 4230 yards of track replaced, and with the other remaining engines sent away for overhaul once 'Enid' returned, 'Snowdon' returned to operation in 1963 with all overhauls from then on carried out at the shed at Llanberis. In 1986 to help the aging steam locomotives the railway purchased two 320hp diesel hydraulic locomotives from the Hunslet Engine Co each having a six cylinder Rolls Royce supercharged diesel engine with a 12 litre capacity. These locomotives becoming No.9 'Ninian' and No.10 'Yeti' with two more arriving in 1991 and 1992, becoming Nos.11 'Peris' and No.12 'George' respectively. The introduction of these locomotives brought high operating efficiency and economy and see most traffic to save the 112 year old steam engines from too much strain, though in 2007 the SMR shows that only four of the engines are still in operation these being Nos.2 'Enid', 3 'Wyddfa', 4 'Snowdon' & 6 'Padarn'. In 1995 the railway also took the step of introducing three diesel electric railcars built in south Wales by HPE Tredgar Ltd, the units able to operate, when required, in multiple, though at present 2007 these are out of service. Control of the railway is from a base at Llanberis a Traffic Controller having two way radio communication with the train crews on route.

An engine ascends the mountain propelling its train.
The journey to Summit and back takes an average of 2 hours and on departing Llanberis station the line passes the original engine shed which is still used for the maintenance and preparation of the engines, just past here is one of the few civil engineering structures on the railway which is a stone viaduct taking the line on a climbing gradient over a road in the village. Short way beyond here is the first passing station of Hebron from where the train continues to Half way the locomotive taking on water as it waits for a descending train to use the passing loop. Clogwyn station is is 1094' below the summit of the mountain and in 2007 is the terminus of the line as the former hotel at Summit is being re-built as a joint enterprise between the railway and Gwynedd County Council.