GER Class L77

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The Great Eastern Railway (GER) Class L77, LNER Class N7, is a class of 0-6-2T steam locomotives. Some were fitted with condensing apparatus for working on the Metropolitan Line and the East London Line but the condensing apparatus was removed between 1935 and 1938.

British Railways numbers were 69600-69733.

Contents 1 Sub-classes 2 Dimensions 3 Preservation 4 External links

[edit] Sub-classes

• N7 Introduced 1914, GER Class L77 with Belpaire firebox
• N7/1 Introduced 1925, LNER development of GER design with Belpaire firebox
• N7/2 Introduced 1926, LNER locos with Belpaire firebox and long-travel valves
• N7/3(1)Introduced 1927, LNER locos with round-top firebox
• N7/3(2)Introduced 1943, rebuild of N7/1 with round-top firebox
• N7/3(3)Introduced 1943, rebuild of N7/2 with round-top firebox
• N7/4 Introduced 1940, GER locos rebuilt with round-top firebox

[edit] Dimensions

• BR Power classification, 3MT
• Locomotive weight: from 61 tons 16 cwt to 64 tons 17 cwt
• Boiler pressure, 180 psi
• Superheater, Yes
• Cylinders, 18"x24"
• Driving wheel diameter, 4' 10"
• Tractive effort, 20,515 lb
• Valve gear, Walschaerts (piston valves)

[edit] Preservation

One, No. 7999 (BR No. 69621) has been preserved on the North Norfolk Railway.

[edit] External links

• LNER encyclopedia
• Railuk database for N7, N7/1 N7/2 N7/3 N7/4 and N7/5
• Preserved locomotive datbase entry for 69621

Locomotives of the London and North Eastern Railway v • d • e
	Pre-grouping railway designs
Great Central:	A5 - B18 - D11 - J11 - O4
Great Eastern:	J65 - J16 - J17 - Y5 - J17 - N7 - ?? - J69 - B12 - J66 - D13 - E4 - J15 - J70
Great North of Scotland:	D40
Great Northern:	C1 - C2 - J6 - J52 - K3 - N2
North British:	D34 - J36 - Y9
North Eastern:	B16 - E5 - D17 - J21 - J27 - J72 - Q6 - Q7 - X1 - Y7
	LNER designs
Gresley:	A1 - A3 - A4 - A8 - B17 -D49 - J38 - J39 - J50 - K4 - P1 - P2 - U1 - V1 - V2 - V3 - V4 - W1
Thompson:	A1 - A2 - B1 - B2 - K1 - K5 - L1 - O1 - Q1
Peppercorn:	A1 - A2 - A6- A7 A9 - K1
Raven:	A2 - H1
Locomotives of:	BR (steam) • GWR • LMS • Southern