Lynton & Barnstaple 2-6-2 Locomotives in Great_Britain


Class Details by Steve Llanso of Sweat House Media

Class Yeo (Locobase 7624)

Data from [] . See also "Tank Locomotive, Lynton & Barnstaple Railway", Engineer, Volume 85 (10 June 1898), p. 547.

The alignment and grades of this 19-mile railway were quite demanding - the ruling grade was 1 in 50 (2%) and many of the grades were continuous. For example, one section rose 800 ft (244 m) in 8 miles (12.9 km). The specification called for the engines to reach a top speed of 20 mph (32 kph) trailing a 50 ton load and to "travel with ease" over curves of 3 1/2 chains (231 ft/70.4 metre) radii. Coal capacity was to allow for a 40-mile (64.4 km) run.

The first three locomotives for this South Devon railway were named after local rivers: Yeo (works# 1361), Exe (1362), and Taw (1363).

Yeo and Exe arrived on the railway before the builders joined other British firms in a 6-month lockout of workers demanding an 8-hour work day. Taw was stored.

A fourth locomotive of the class -- Lew (2042) -- arrived 27 years later. It had the same specifications, but the cab was redesigned to eliminate a pesky smoke buildup.

All operated on the L&B until its sale and dismantling in 1935. Unlike the others, which were scrapped, the Lew aided in pulling up the railroad itself. After its sale to a Brazilian plantation in 1936, all traces of the locomotive were lost.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassYeo
Locobase ID7624
RailroadLynton & Barnstaple
CountryGreat Britain
Whyte2-6-2T
Number in Class3
Road Numbers759-761
Gauge60 cm
Number Built3
BuilderManning Wardle
Year1897
Valve GearJoy
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.50 / 1.98
Engine Wheelbase (ft / m)17.75 / 5.41
Ratio of driving wheelbase to overall engine wheelbase 0.37
Overall Wheelbase (engine & tender) (ft / m)17.58 / 5.36
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg) / 11,793
Engine Weight (lbs / kg)61,040 / 27,687
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)61,040 / 27,687
Tender Water Capacity (gals / ML)664 / 2.52
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)33 / 838
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)10.5" x 16" / 267x406
Tractive Effort (lbs / kg)7270 / 3297.62
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)84 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.92 / 2.72
Firebox Area (sq ft / m2)40 / 3.72
Grate Area (sq ft / m2) 8.85 / 0.82
Evaporative Heating Surface (sq ft / m2)383 / 35.58
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)383 / 35.58
Evaporative Heating Surface/Cylinder Volume238.85
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1416
Same as above plus superheater percentage1416
Same as above but substitute firebox area for grate area6400
Power L13199
Power MT

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