SECR N1 class
The SECR N1 class was a type of 3-cylinder 2-6-0 ('mogul') steam locomotive designed by Richard Maunsell for mixed traffic duties, initially on the South Eastern and Chatham Railway (SECR), and later operated for the Southern Railway (SR). The N1 was a development of the basic principles established by the Great Western Railway's (GWR) Chief Mechanical Engineer (CME) George Jackson Churchward and by Maunsell's previous N class design.

The N1 prototype was the result of modifications made to N class No. 822 during construction in 1922. The locomotive became operational in 1923 and used parts interchangeable with other Maunsell locomotive classes. The prototype N1 was the only member of the class constructed before the SECR became part of the Southern Railway at the Grouping in 1923, and featured a variant of the Gresley conjugated valve gear designed by Harold Holcroft. The class set the precedent for the Southern Railway's subsequent 3-cylinder designs.

The N1s compared favourably with the N class, although the type showed little improvement in performance. More of the class were built when it became clear that the type's smaller cylinders provided greater route availability. A total of six engines were built. The N1 class was primarily used on the Eastern section of the Southern Railway network, and used by the Southern Region of British Railways (BR) from 1948. The N1s gave valuable service until they were withdrawn in 1962. None were preserved.
Q2441836
2-6-0
MISC
Q171043
steam locomotive
Concept
Q7327693
Richard Maunsell
PER
Q93301
mixed traffic
Concept
Q2304446
South Eastern and Chatham Railway
ORG
Q741266
Southern Railway
ORG
Q843251
Great Western Railway
ORG
Q5096994
Chief Mechanical Engineer
Concept
Q5541045
George Jackson Churchward
PER
Q7389609
N class
MISC
Q688985
Grouping in 1923
MEDIA
Q5607614
Gresley conjugated valve gear
Concept
Q5661079
Harold Holcroft
PER
None
Eastern section
UNK
Q7570387
Southern Region
ORG
Q605169
British Railways
ORG
Q7389610
SECR N1 class
Concept
1922-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1922
DATE
1923-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1923
DATE
1923-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1923
DATE
1948-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1948
DATE
1962-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1962
DATE
+1^^http://www.w3.org/2001/XMLSchema#decimal
1
NUMBER
+3^^http://www.w3.org/2001/XMLSchema#decimal
3
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
-6^^http://www.w3.org/2001/XMLSchema#decimal
-6
NUMBER
-0^^http://www.w3.org/2001/XMLSchema#decimal
-0
NUMBER
+1^^http://www.w3.org/2001/XMLSchema#decimal
1
NUMBER
+1^^http://www.w3.org/2001/XMLSchema#decimal
1
NUMBER
+822^^http://www.w3.org/2001/XMLSchema#decimal
822
NUMBER
+1^^http://www.w3.org/2001/XMLSchema#decimal
1
NUMBER
+3^^http://www.w3.org/2001/XMLSchema#decimal
3
NUMBER
+1^^http://www.w3.org/2001/XMLSchema#decimal
1
NUMBER
+1^^http://www.w3.org/2001/XMLSchema#decimal
1
NUMBER
+1^^http://www.w3.org/2001/XMLSchema#decimal
1
NUMBER
designed by
item operated
number of cylinders
service entry
number of cylinders
discoverer or inventor