STEAM ENGINEERING 
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 L101NS 
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621.13 Locomotivs 
BES Theory of the locomotiv 
Adhesion Tractiv force Horsepower 
Tests 
Types 
Variations modifying tractiv force and speed, and affecting more than 
I class of mechanism. For variations in steam apparatus (oil burning 
locomotivs, etc.) see 621,133 and 621.124 
Primitiv forms 
Types according to distribution of wheelbase and load 
Exprest by Whyte nomenclature for wheel combinations 
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2 
5 
7 
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3 
£33 
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Types according to purpose 
Freight or goods engins Hog engin 
Yard, switch or shunting engins 
Passenger enging 
Mountain # 
Mining * 
Other special locomotivs 
Peculiar types 
Combined ‘engin and coach wagon’ 
Types in different countries 
Subdivided like 940-999; e.g. English locomotivs 6az. 132942 
Locomotiv boilers Production of steam 
Better clast in 621. 18423, as boilers of locomotiv type serv many other 
purposes For boiler management see 621.193 
Combustion Fuels Petroleum Fuel consumption 
See also 621.18357 
Grate and ashpit Firebox Stays 
See also 621.1833 
Shell and tubes 
Smokebox and stack Spark arresters 
See also 621.1838 
Exhaust pipe 
Dome 
Miscellaneous fittings 
Gage cocks, safety valvs, whistles, pumps, injectors, ete, 
Engin of the locomotiv 
Driving mechanism Cylinders, pistons, rods 
Steam distribution Valvs and valv gears 
Special types of valvs and valv gear 
Compound principle 
Distribution in compound locomotivs 
Lubrication of locomotiv 
Other parts of locomotiv: throttle, etc. 
Running gear 
Tenders 
Design, weight, brakes, etc. 
Appliances 
Taking water without stopping; track tanks; water SCOOPS 
Miscellaneous parts 
Cowcatcher or pilot, hedlight. whistle, bell, sandbox