British Rail Class 22
2898314
225558873
2008-07-14T08:50:02Z
Nono64
2313206
Western Region of British Railways : "Western Region" link correction
{{Infobox Locomotive
|name = North British Type 2 diesel-hydraulic<br>British Rail Class 22
|powertype = Diesel-hydraulic
|image = D6343, d7072 - old oak common - 1965.jpg
|caption = D6343 with [[British Rail Class 35|Hymek]] D7072 at Old Oak Common, 1965.
|roadnumber = D6300–D6357
|totalproduction = 58
|nicknames = ''Baby Warship''
|builder = [[North British Locomotive Co.]]
|builddate = 1959–1962
|gauge = {{RailGauge|ussg|lk=on|al=on}}
|primemover = [[MAN B&W Diesel|MAN]] L12V18/21A or 21B
|transmission = Hydraulic: Voith LT306r
|whytetype = B-B
|uicclass = B'B'
|wheeldiameter = {{convert|3|ft|7|in|m|3|abbr=on}}
|minimumcurve =
|trainbrakes = Vacuum
|locobrakeforce =
|wheelbase = {{convert|31|ft|6|in|abbr=on}}
|length = {{convert|46|ft|8+1/2|in|abbr=on}}
|width = {{convert|8|ft|8|in|abbr=on}}
|height = {{convert|12|ft|10|in|abbr=on}}
|weight = ''D6300–D6305:'' {{convert|68|LT|sigfig=3|lk=on}}<br>''D6306–D6357:'' {{convert|65|LT|sigfig=3}}
|topspeed = {{convert|75|mph|km/h|0|abbr=on|lk=on}}
|poweroutput = ''Engine:'' {{convert|1000|hp|0|abbr=on|lk=on}} or {{convert|1100|hp|0|abbr=on}}
|tractiveeffort = ''Maximum:'' {{convert|40000|lbf|kN|1|abbr=on|lk=on}}
|fuelcap = {{convert|450|impgal|abbr=on|lk=on}}
|trainheating = {{convert|1000|lb}} per hour [[steam generator (railroad)|steam generator]]
|multipleworking = ''D6300–D6305:'' <font color=darkorange>■</font> Orange square<br>''D6306–D6357:'' <font color=white>◆</font> White diamond
|axleloadclass = ''GWR:'' <font color=gold>●</font>Yellow<br>''BR:'' [[Route availability]] 4
|railroad = [[British Railways]]
|retiredate = 1967–1972
|disposition = All scrapped
}}
The [[British Rail]] '''Class 22''' or "Baby Warship" was a class of diesel-hydraulic locomotives designed for the [[Western Region of British Railways|Western Region]] and built by [[North British Locomotive Company]]. They were very similar in appearance to the [[British Rail Class 21|Class 21]] diesel-electrics.
==History==
D6300 was introduced to traffic in 1958 and deliveries continued through until 1962.
The Class 22s were allocated to [[Bristol Bath Road TMD|Bristol Bath Road]], [[Laira TMD|Laira Plymouth]], [[Newton Abbot railway station#Engine shed|Newton Abbot]] and [[Old Oak Common TMD|Old Oak Common]].
Reliability was poor and withdrawals commenced in 1967 and finished with the withdrawal of 6333, 6336, 6338 and 6339 in December 1971. This was partly because of prejudices against hydraulic transmission high up in BR's engineering wings which deemed all the Western Region's diesel-hydraulic locomotives non-standard. Ex-[[Eastern Region of British Railways|Eastern Region]] [[British Rail Class 31|Class 31]] diesel-electrics were drafted in as replacements.
The Class is now extinct, but an attempt was made to preserve D6319. A purchase price was agreed with BR but before the locomotive could be moved to safety it was cut up by staff at Swindon Works. BR offered the purchaser the opportunity to purchase a [[British Rail Class 42|Warship class]] locomotive at the same price and D821 ''Greyhound'' thus became the first preserved ex-BR mainline diesel locomotive.
==Description==
The NBL type 2s were introduced in all-over green livery with a light grey skirt band, mid-grey roof, red buffer beams, and black underframe. Numbers appeared below all four cab windows and the BR "Lion and wheel" emblem was placed high on the bodyside as centrally as possible.
Later a small yellow warning was added.
From 1967 locos were repainted in the new corporate rail blue livery with full yellow ends. The "arrows of confusion" logo was placed immediately below each cab window, with the loco number below this although on some locos this was reversed.
==Technical details==
* Introduced: 1959
* Weight:
** D6300-D6305, 68 tons
** D6306-D6357, 65 tons
* Engine:
** D6300-D6305, NBL/MAN 1,000 bhp
** D6306-D6357, NBL/MAN 1,100 bhp
* Transmission: Hydraulic, Voith/NBL L.T.306r
* Maximum tractive effort: 40,000 lb
* Driving wheel diameter: 3ft 7in
* Coupling code:
** D6300-D6305, Orange square
** D6306-D6357, White diamond
* Train heating: [[Steam generator (railroad)|Steam generator]]
==Class 22 electric locomotive==
[[Image:SNCF BB 22207 at Nantes.JPG|thumb|Class 22 locomotive]]
Class 22 was also used as the TOPS classification for the dual voltage [[SNCF Class BB 22200|BB 22200]] Class locomotives belonging to [[SNCF]] that were utilised on freight workings through the [[Channel Tunnel]] prior to the delivery of the [[British Rail Class 92|Class 92]] locomotives during [[1994]] and [[1995]] [http://www.therailwaycentre.com/Resource_data/All%20Time%20class%20Loco.pdf]
==Sources==
*{{cite book | last = Preedy | first = Norman E | coauthors = Gillham, G F| title = WR Diesel Hydraulics | publisher = D Bradford Barton | date = 1974 | location = Truro }}
*{{cite book | last = Stevens-Stratten | first = S.W. | coauthors = Carter, R.S. | title = British Rail Main-Line Diesels | publisher = Ian Allen Ltd | date = 1978 | location = Shepperton | isbn = 0 7110 0617 2}}
*Ian Allan ABC of British Railways Locomotives, summer 1966 edition
== External links ==
* [http://www.greatwestern.org.uk/d6300m_in.htm The Western Region Archive]
{{commonscat|{{PAGENAME}}}}
{{British Rail Locomotives}}
[[Category:British Rail diesel locomotives|22]]
[[Category:B-B locomotives]]
[[Category:NBL locomotives]]