LMS Patriot Class 5551 The Unknown Warrior

Specifications
Specifications
Configuration:;
• Whyte	4-6-0
• UIC	2′C h2
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	3 ft 3 in (0.991 m)
Driver dia.	6 ft 9 in (2.06 m)
Length	62 ft 8+3⁄4 in (19.120 m)
Loco weight	80.75 long tons (82.05 t; 90.44 short tons)
Tender weight	42.70 long tons (43.39 t; 47.82 short tons)
Total weight	123.45 long tons (125.43 t; 138.26 short tons)
Fuel type	Coal
Fuel capacity	5.5 long tons (5.6 t; 6.2 short tons)
Water cap.	3,900 imp gal (18,000 L; 4,700 US gal)
Firebox:
• Grate area	30+1⁄2 sq ft (2.83 m2)
Boiler	G9½S
Boiler pressure	200 psi (1.4 MPa)
Heating surface:
• Firebox	183 sq ft (17.0 m2)
• Tubes and flues	1,552 sq ft (144.2 m2)
Superheater:;
• Heating area	365 sq ft (33.9 m2)
Cylinders	3
Cylinder size	18 in × 26 in (457 mm × 660 mm)
Valve gear	Walschaerts
Valve type	Piston valves
Train brakes	Vacuum (primary), Air

Type and origin
Type and origin
Power type	Steam
Designer	Sir Henry Fowler (original designer)
Builder	Original - LMS Crewe Works, Rebuild- The LMS Patriot Project
Build date	Original - May 1934, Rebuild - 2008–present

LMS Patriot Class 5551 *The Unknown Warrior*
LMS Patriot Class 5551 The Unknown Warrior
	An almost complete looking 5551 inside the shed at Crewe Heritage Centre, on this day it was to have its new crest unveiled.
Power type
Type and origin
Power type	Steam
Designer	Sir Henry Fowler (original designer)
Builder	Original - LMS Crewe Works, Rebuild- The LMS Patriot Project
Build date	Original - May 1934, Rebuild - 2008–present
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-0
• UIC	2′C h2
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	3 ft 3 in (0.991 m)
Driver dia.	6 ft 9 in (2.06 m)
Length	62 ft 8+3⁄4 in (19.120 m)
Loco weight	80.75 long tons (82.05 t; 90.44 short tons)
Tender weight	42.70 long tons (43.39 t; 47.82 short tons)
Total weight	123.45 long tons (125.43 t; 138.26 short tons)
Fuel type	Coal
Fuel capacity	5.5 long tons (5.6 t; 6.2 short tons)
Water cap.	3,900 imp gal (18,000 L; 4,700 US gal)
Firebox:
• Grate area	30+1⁄2 sq ft (2.83 m2)
Boiler	G9½S
Boiler pressure	200 psi (1.4 MPa)
Heating surface:
• Firebox	183 sq ft (17.0 m2)
• Tubes and flues	1,552 sq ft (144.2 m2)
Superheater:;
• Heating area	365 sq ft (33.9 m2)
Cylinders	3
Cylinder size	18 in × 26 in (457 mm × 660 mm)
Valve gear	Walschaerts
Valve type	Piston valves
Train brakes	Vacuum (primary), Air
Tractive effort
Performance figures
Tractive effort	26,520 lbf (118.0 kN)
Class
Career
Class	Patriot Class
Numbers	5551 (LMS Colours) ; 45551 (BR Colours) ; 98651 (TOPS)
Official name	The Unknown Warrior
First run	Original - May 1934, Replica -
Retired	June 1962
Disposition	Original locomotive scrapped, rebuilt under construction

No.5551 The Unknown Warrior is a replica LMS Patriot Class steam locomotive which is under construction at Tyseley Locomotive Works.

The locomotive is a replica of the final 'Patriot' class locomotive to be built, No.5551. The original locomotive was built in May 1934, and withdrawn in June 1962 (it was scrapped that October). Unlike the original engine, which never received a name, the new one will be named "The Unknown Warrior"; the name was chosen by public poll.

All of the original un-rebuilt LMS Patriot Class locomotives were withdrawn by November 1962 and the whole class was withdrawn by December 1965 with none of the engines (un-rebuilt or rebuilt) surviving into preservation.