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LYR/LMS Aspinall "91" Class 0-8-0


Class Types
LYR Class 91
LYR Class 30 (Hughes reclassification)

General
Designer Sir John Aspinall
Introduced 1900
Pre-Grouping Lancashire and Yorkshire Railway
Big Four London, Midland & Scottish Railway
Wheels 0-8-0
Number Built as 91 110
Conversions to other classes 48
Manufacturers
ManufacturerTotal
Horwich Works 110
Orders
BuilderSponsorOrder #DateSize
Horwich Works  43 04/1900 20
Horwich Works  44 06/1901 20
Horwich Works  47 07/1902 20
Horwich Works  50 08/1904 20
Horwich Works  55 11/1906 10
Horwich Works  58 07/1907 20

Power
6 wheel tenders 91
Variant Introduced 1900 1901
Miscellaneous Differences   8 wheel tender, piston valves
Inside Cylinders 20" x 26" (2 off) 20" x 26" (2 off)
Inside Valves Richardson Piston
Inside Motion Joy Joy

Wheels
6 wheel tenders 91
Drivers 4' 6" 4' 6"
Locomotive Wheelbase 16' 8" 16' 8"
Descriptive Wheelbase 5' 11½" + 5' 2¼" + 5' 2¼" = 16' 4" (engine only) 5' 11½" + 5' 2¼" + 5' 2¼" = 16' 4" (engine only)

Dimensions
6 wheel tenders 91
Weight (loco only) 53t 15cwt 53t 15cwt

Boiler & Firebox
6 wheel tenders 91
Boiler Diagram Aspinall 4' 8" Aspinall 4' 8"
Boiler Notes Aspinall design Aspinall design
Boiler Max Diameter 4' 10" 4' 10"
Boiler Barrel Length 15' 15'
Boiler Pressure 180lbs 180lbs
Firebox Heating Surface 147ft2 147ft2
Total Heating Area 1914ft2 1914ft2