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4TC : ウィキペディア英語版
British Rail Class 438

The British Rail TC (Trailer Control) multiple units were un-powered fixed formations of 3 or 4 carriages with a driving position at each end of the set, converted by BR's BREL York Works from locomotive-hauled Mark 1 carriages in 1966-1967 and 1974. The units built on experience gained from the prototype 6TC unit. In time the 3 car units (3TC, numbered in the series 3xx) were reformed into four car units (4TC numbered in the series 4xx) to match the rest of the fleet and later classified as Class 442. This was later changed to Class 491, under which they spent the majority of their working lives. Shortly before withdrawal they were reclassified Class 438 and the units were renumbered to 8001-8034.
==Operation==
The units were primarily employed on services between London Waterloo and Weymouth. One or two 4TC units would be propelled from London to Bournemouth by a 3200 HP 4REP unit, controlled from the leading cab. At Bournemouth, one or both 4TCs would continue over the un-electrified line to Weymouth, hauled by a Class 33/1 diesel locomotive, leaving the 4REP at the London end of Bournemouth station. Up trains from Weymouth would follow the same procedure in reverse: the Class 33/1 locomotive would propel its train to Bournemouth (controlled from the 4TC leading cab). There the 4TCs would couple to the waiting 4REP which would then power the whole formation to London, leaving the Class 33/1 locomotive at Bournemouth to await the next such service. 4TC units were occasionally seen on other duties such Waterloo to Salisbury, the Clapham Junction to Kensington Olympia shuttle before that line was electrified and surplus units were also used on Sundays to operate Portsmouth Harbour to Reading direct services during the late 1970s & early 1980s. They were pressed into general service as needed, often deputising for electric trains when the power was switched off and occasionally on inter-regional Southern Region services. They ventured further afield on special duties or rail-tours, including Birmingham, Cardiff, Barnstaple/Meeth & Meldon Quarry. Until the closure of the Swanage branch, a small number of through 4TC workings to/from Waterloo were operated, also using class 33/1 locomotives in similar style to the Weymouth trains.
The spare DTSO number 76331 was equipped with a modernised interior - the seats were replaced with ''Inter-City'' style individual bucket seats (as used in the contemporary Mk2A/B/C carriages) and fluorescent lighting to match. This modified car was then placed into unit 417 from the early 1970s, and the displaced 76302 was kept spare at Bournemouth Traction Maintenance Depot.
No general refurbishment was ever undertaken on the units and they ran with their original incandescent lighting until withdrawal. A feature of a journey in a 2x4TC/4REP train with the 4REP pushing, was severe jolting at station restarts; this upset many a hot drink over the years. This was particularly prevalent at stations on a descending gradient such as New Milton (down trains). There would be sometimes several jolts of varying intensity until the couplings were fully compressed.
The Units were fitted with a motor-generator set for lighting supply and a single compressor; these drew power from the REP or loco through the ETH jumpers.
In 1986, two 4TC sets were temporarily converted to 4TCB (Trailer Control Buffet) by removing the TFK coaches and inserting buffet coaches from withdrawn 4REP units. They were designated as the class 492/8 and numbered set 802 and 807. This was in part to compensate for the loss of the Buffet in TC+REP formations as those units were withdrawn over a period of time for scrapping to give up their traction equipment for the new Mk3 based Wessex Electrics.
In December 1987, the two 4TCB sets and four other 4TC sets were converted to 4TCT (Trailer Control Trolley) sets. The buffet coaches in the 4TCB sets and TFK coaches in 4TC sets were replaced with TFK coaches from redundant 4TC sets modified to take catering trolleys. They were designated the class 438/1 and numbered sets 101-106.
Following the withdrawal of the 4REP units, three temporary 5TCB sets were formed in 1988 by inserting REP buffet cars into 4TC sets. They were also designated as the class 492/8 and numbered sets 804, 807 and 809.
On occasion class 33/0 locomotives were substituted for unavailable 33/1s; in this event the loco had to run-round at Weymouth and the starting bell/loudaphone system could not be used, the guard having to resort to the use of a green flag to start the train at station stops.
At the time that the Clapham Junction - Kensington Olympia service was being run by Network South East with Class 73 traction DTSO number 76327 was part equipped with a modernised interior. The driving end was fitted with 4CEP style windows, ceiling (with fluorescent lights and luggage racks but with 3+2 Class 319 seating.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「British Rail Class 438」の詳細全文を読む



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