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Record: 10408 (31/12/2024)
(Free MySQL Counter)
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GNR/LNER Gresley "O2" Class 2-8-0
General
| Designer |
Sir Nigel Gresley |
| Introduced |
1918 |
| Pre-Grouping Company |
Great Northern Railway |
| Grouping Company |
London and North Eastern Railway |
| Description (1957) |
Class O2, the original Gresley 3-cylinder 2-8-0, built in 1918 and the first 3-cylinder locomotive constructed by him. It differed from the rest of the class by having inclined cylinders. Finally withdrawn in 1948 as No. 3921.
Class O2/1 - O2/4, a development of the original engine (No. 63921). Constructed by Gresley as 3-cylinder 2-8-0's with 4'8" wheels between 1921 and 1934. All the class were still running in 1957, |
| Wheel Arrangement |
2-8-0 |
| Number Built as O2 |
67 |
| First in Service |
05/1918 |
| Last in Service |
03/11/1963 |
| Manufacturers |
|
| Orders |
|
|
|
|
Power
|
O2/1 |
O2/2 |
O2/3 |
O2/4 |
O2 |
| Variant Introduced |
1921 |
1923 |
1918 |
1932 |
1918 |
| Miscellaneous Differences |
Great Northern loading gauge, with side window cabs |
As O2/1 |
As O2/1 |
Diagram 100A superheated boiler (set at 180lb/sq in) |
Original engine with Gresley patent conjugated valve gear. |
| Tractive Effort |
36,470lbs |
As O2/1 |
As O2/1 |
As O2/1 |
34,523lbs |
| Inside Cylinders |
18.5" x 26" (1 off) |
As O2/1 |
As O2/1 |
As O2/1 |
As O2/1 |
| Inside Valves |
8"Piston |
As O2/1 |
As O2/1 |
As O2/1 |
As O2/1 |
| Inside Motion |
Gresley |
As O2/1 |
As O2/1 |
As O2/1 |
As O2/1 |
| Outside Cylinders |
18.5" x 26" (2 off) |
As O2/1 |
As O2/1 |
As O2/1 |
As O2/1 |
| Outside Valves |
8"Piston |
As O2/1 |
As O2/1 |
As O2/1 |
As O2/1 |
| Outside Motion |
Gresley |
As O2/1 |
As O2/1 |
As O2/1 |
As O2/1 |
Wheels
|
O2/1 |
O2/2 |
O2/3 |
O2/4 |
O2 |
| Pony |
2' 8" |
As O2/1 |
As O2/1 |
As O2/1 |
3' 2" |
| Drivers |
4' 8" |
As O2/1 |
As O2/1 |
As O2/1 |
As O2/1 |
| Locomotive Wheelbase |
27' 2" |
As O2/1 |
As O2/1 |
As O2/1 |
26' 4" |
| Tender Wheelbase |
13' |
As O2/1 |
As O2/1 |
As O2/1 |
As O2/1 |
| Descriptive Wheelbase |
8' 8" + 6' 6" + 6' 0" + 6' 0" = 27' 2" (engine only) |
As O2/1 |
As O2/1 |
As O2/1 |
7' 10" + 6' 6" + 6' 0" + 6' 0" = 26' 4" (engine only) |
Dimensions
|
O2/1 |
O2/2 |
O2/3 |
O2/4 |
O2 |
| Length (over buffers) |
61' 43⁄4" |
As O2/1 |
As O2/1 |
As O2/1 |
As O2/1 |
| Weight (in running order) |
118t 18cwt |
As O2/1 |
As O2/1 |
As O2/1 |
As O2/1 |
| Weight (loco only) |
75t 16cwt |
As O2/1 |
78t 13cwt |
74t 2cwt |
76t 8cwt |
| Adhesive Weight |
67t 7cwt |
As O2/1 |
69t 7cwt |
64t 12cwt |
66t 12cwt |
| Maximum Axle Load |
17t 12cwt |
As O2/1 |
18t 9cwt |
17t 3cwt |
17t 2cwt |
| Water Capacity |
3,500gal |
As O2/1 |
As O2/1 |
As O2/1 |
As O2/1 |
| Coal Capacity |
6t 10cwt |
As O2/1 |
As O2/1 |
As O2/1 |
As O2/1 |
Boiler & Firebox
|
O2/1 |
O2/2 |
O2/3 |
O2/4 |
O2 |
| Boiler Diagram |
2 |
As O2/1 |
As O2/1 |
100A |
As O2/1 |
| Boiler Max Diameter |
5' 6" |
As O2/1 |
As O2/1 |
5' 6" |
As O2/1 |
| Boiler Barrel Length |
16' 13⁄8" |
As O2/1 |
As O2/1 |
13' 117⁄8" |
As O2/1 |
| Boiler Pressure |
180lbs |
As O2/1 |
As O2/1 |
225lbs |
As O2/1 |
| Boiler Pitch |
8' 71⁄4" |
As O2/1 |
As O2/1 |
As O2/1 |
As O2/1 |
| Firebox Type |
Round Top |
As O2/1 |
As O2/1 |
As O2/1 |
As O2/1 |
| Firebox Length |
9' 6" |
As O2/1 |
As O2/1 |
9' |
As O2/1 |
| Firebox Grate Area |
27.5ft2 |
As O2/1 |
As O2/1 |
27.9ft2 |
As O2/1 |
| Firebox Heating Surface |
163.5ft2 |
As O2/1 |
As O2/1 |
168ft2 |
As O2/1 |
| Tube Number |
160 |
As O2/1 |
As O2/1 |
141 |
As O2/1 |
| Tube Diameter |
2" |
As O2/1 |
As O2/1 |
2" |
As O2/1 |
| Tube Area |
1340.5ft2 |
As O2/1 |
As O2/1 |
1033ft2 |
As O2/1 |
| Flue Elements |
24 |
As O2/1 |
As O2/1 |
24 |
As O2/1 |
| Flue Diameter |
51⁄4" |
As O2/1 |
As O2/1 |
51⁄4" |
As O2/1 |
| Flue Area |
528ft2 |
As O2/1 |
As O2/1 |
460ft2 |
As O2/1 |
| Total Evaporative Area |
2032ft2 |
As O2/1 |
As O2/1 |
1661ft2 |
As O2/1 |
| Superheater Elements |
24 |
As O2/1 |
As O2/1 |
24 |
As O2/1 |
| Superheater Element Diameter |
11⁄4" |
As O2/1 |
As O2/1 |
1.244" |
As O2/1 |
| Superheater Element Area |
430.5ft2 |
As O2/1 |
As O2/1 |
344ft2 |
As O2/1 |
| Total Heating Area |
2462.5ft2 |
As O2/1 |
As O2/1 |
As O2/1 |
As O2/1 |
|