Joined in 2023 
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A Rolls-Royce auxiliary diesel engine, driving a Stone's alternator is mounted on the underframe of each of these cars. This equipment provides the power for the air-conditioning, heating, lighting and 24v. battery charging, etc., on the whole train. The temperature conditions within the car are thermostatically controlled, the transition from operation of cooling to heating equipment or vice versa, being automatically effected. Three different temperature settings for heating and cooling are provided which the attendant can select by a manual control switch within the car. Type – Motor Car, containing Driver's Compartment, Engine Compartment, Generator Compartment, Guard's Compartment, Passenger Saloon.
Control switch. Engine start push button. Engine stop push button. Overload reset push button. Engine stop indicator light. Alarm indicator light. E.P. Brake indicator light. Auxiliary heat switch. The power cars at each end contain a 1,000 h.p. 12-cyl. diesel engine coupled to a main electric generator designed to supply traction current at between 1,250 and 1,700 amperes, as well as auxiliary generators feeding the lighting, heating and air-conditioning, refrigeration and other comprehensive equipment. They also have some seating accommodation, guard's and luggage compartments. These conditions are achieved by a refrigerating and heating installation in each car which can be accurately controlled within a range to suit the detailed requirements of the particular service. These partitions are a polished rich dark brown, and those at both ends of the Parlour Car and at the Kitchen end of the Kitchen Car incorporate brightly coloured inlaid murals of a most modern and striking design.
General lighting in all saloons is provided by fluorescent tube fitted behind a fluted perspex screen about 2 ft. wide, running along the centre of the ceiling. Metal mouldings fitted to each side of this panel conceal the air delivery ducts through which the air from the air-conditioning unit is passed into the saloon. Introduction of PULLMAN DIESEL EXPRESS SERVICES between WOLVERHAMPTON & BIRMINGHAM AND LONDON (PADDINGTON): ALSO BRISTOL and LONDON (PADDINGTON),
The bogies are also of welded construction, the tubular frames of the leading and motor bogies being fabricated from special steel pressings.If cooling is called for the refrigeration equipment is made active, this also having the effect of condensing out excessive moisture in the air supply. If heating is required the electric heating elements are made active, supported by the electric elements fitted at floor level. The gangways between cars have been developed for air-conditioned vehicles and incorporate special rubber bellows and clipping arrangements to ensure that they are air-tight. The interiors incorporate hinged and sprung flaps covered with padded Lanide which allow the necessary relative movement between the vehicles, and at the same time always present a continuous Lanide-covered wall. The overall effect is a big improvement on any gangways on existing vehicles. Two W.R. sets each of 8 cars, providing first and second class accommodation, and named the Birmingham Pullman and Bristol Pullman respectively operate twice each way. ... Air cooling and dehumidification are accomplished by means of a mechanical refrigeration system. The compressor and condenser units of the system are mounted on the underframe of the cars and the evaporator units are mounted in the car ceiling. Heating is achieved by means of electric heating elements at floor level, and in the air-conditioning unit in the ceiling.
The decorative schemes in all Second Class saloons are identical, whereas two different schemes have been used in the First Class accommodation. Details of the materials used in all schemes are as follows: Total length of train over buffers 545 ft. 1 in. Total First Class seats 108 Total Second Class seats 120. Details of Power Equipment The advantages to the passenger are that the atmosphere inside thetrain is always draughtless, clean and comfortable; the upholstery, fittings and service appointments are always clean, and Every vehicle in the train is of all-steel welded construction, the trailer cars being designed on the stressed skin principle, whilst the power cars have box girder type underframes. These underframes are fabricated throughout from steel plate welded together, the whole frame being made in several parts which were stress relieved prior to the final assembly of the frame.The passenger saloons of all cars in the train are fitted with a fully comprehensive air-conditioning system. The train name and destination stations are displayed on roller blinds through glazed panels let into the bodysides of each end car, the mechanism being operated from inside the Guard's compartment. When the trains are standing in terminal stations an external supply will be connected to the train by means of the jumpers to avoid running the auxiliary engine. This is to obviate the inconvenience which would be caused to passengers on the platform by the noise of the auxiliary engine running in a confined space. The supply will be disconnected and the auxiliary engine started shortly before the train is due to leave.
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