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Record: 71951 (21/04/2026)
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NER/LNER Raven "C7" Class 4-4-2


Class Types
NER Class Z

General
Designer Sir Vincent Raven
Introduced 1911
Pre-Grouping Company North Eastern Railway
Grouping Company London and North Eastern Railway
Description (1957) Class C7. Raven 3-cylinder Atlantics with 6'10' wheels. Originally North Eastern class Z of 50 engines built 1911-18. Scrapping commenced in 1942, all the British Railways' survivors going in 1948.
Wheel Arrangement 4-4-2
Number Built as C7 50
First in Service 07/1911
Last in Service 26/06/1948
Manufacturers
ManufacturerTotal
Darlington Works 30
North British Locomotive Company, Glasgow 20
Orders
BuilderSponsorOrder #DateSize
North British Locomotive Company, Glasgow (Unknown)  L436 1911 10
North British Locomotive Company, Glasgow (Unknown)  L437 1911 10
Darlington Works  n/a 1914 10
Darlington Works  n/a 1914 19
Darlington Works  n/a 1918 1

Power
C7/1 C7/2 C7 Uniflow
Variant Introduced 1911 1911 1918
Tractive Effort 19,300lbs
As C7/1
As C7/1
Inside Cylinders 16.5" x 26" (1 off)
As C7/1
As C7/1
Inside Valves 7.5"Piston Lentz
As C7/1
Inside Motion Stephenson
As C7/1
As C7/1
Outside Cylinders 16.5" x 26" (2 off)
As C7/1
As C7/1
Outside Valves 7.5"Piston Lentz
As C7/1
Outside Motion Stephenson
As C7/1
As C7/1

Wheels
C7/1 C7/2 C7 Uniflow
Pony 3' 71⁄4"
As C7/1
As C7/1
Drivers 6' 10"
As C7/1
As C7/1
Truck 4'
As C7/1
As C7/1
Locomotive Wheelbase 29' 6"
As C7/1
As C7/1
Tender Wheelbase 12' 8"
As C7/1
As C7/1
Total Wheelbase 53' 37⁄8"
As C7/1
As C7/1
Descriptive Wheelbase 6' 6" + 7' 5" + 7' 7" + 8' 0" + (11' 1⅞") + 6' 4" + 6' 4" = 53' 3⅞"
As C7/1
As C7/1

Dimensions
C7/1 C7/2 C7 Uniflow
Length (over buffers) 63' 83⁄8"
As C7/1
As C7/1
Weight (in running order) 125t 16cwt
As C7/1
As C7/1
Weight (loco only) 79t 4cwt
As C7/1
As C7/1
Adhesive Weight 40t 14cwt
As C7/1
As C7/1
Maximum Axle Load 20t 16cwt
As C7/1
As C7/1
Water Capacity 4,125gal
As C7/1
As C7/1
Coal Capacity 5t 10cwt
As C7/1
As C7/1

Boiler & Firebox
C7/1 C7/2 C7 Uniflow
Boiler Diagram BR0
As C7/1
As C7/1
Boiler Pitch 8' 11"
As C7/1
As C7/1
Firebox Type Belpaire
As C7/1
As C7/1