GNR Class O2

GNR Class O2

Infobox Locomotive
powertype=Steam
name = GNR Class O2


caption = 63956 out of use on no.7 road, Annesley MPD. May 1964. She was waiting to go to Rigley's Wagon Works for breaking, having been withdrawn from Grantham (34F) in September 1963
designer = Nigel Gresley
builder = GNR and LNER
builddate = 1921-1943
totalproduction =
whytetype = 2-8-0
gauge = 4' 8½"
leadingsize =
driversize = 4' 8"
length =
weight = Engine: 74 tons 2 cwt to 78 tons 13 cwt
Tender: 43 tons 2 cwt to 52 tons 0 cwt
fueltype = coal
fuelc

waterc

cylindercount = 3
cylindersize = 18½" x 26"
firearea =
boilerpressure = 180 psi
tractiveeffort = 36,740 lbf
railroadclass= 8F|

The Great Northern Railway (GNR) Class O2 was a class of three-cylinder 2-8-0 steam locomotive designed by Nigel Gresley for freight work and built by the GNR from 1921. Further examples were built by the London and North Eastern Railway (LNER) from 1924.

ub-classes

The LNER created four sub-classes: [Ian Allan ABC of British Railways Locomotives, summer 1961 edition, part 4, pp 37-38]
* O2/1, Introduced 1921. Development of experimental Gresley GNR 3-cylinder locomotive (LNER 3921). Subsequently rebuilt with side-window cab and reduced boiler mountings.
* O2/2, Introduced 1924. Development of O2/1 with detail differences.
* O2/3, Introduced 1932. Development of O2/2 with side-window cab and reduced boiler mountings.
* O2/4, Introduced 1943. Rebuilt with 100A (B1 type) boiler and smokebox extended backwards.

British Railways

The locomotives passed to British Railways (BR) in 1948 and were given BR Numbers 63922-63987.

References

External links

* [http://www.lner.info/locos/O/o2.shtml LNER encyclopedia]


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