Steam engines powered most of the trains from the 1800s to the 1950s. Steam locomotives are railway locomotives that produce their pulling power. Fuel for these steam locomotives engines is produced by burning combustible material, usually coal or wood to produce steam in a boiler.
The image below shown is a steam locomotive train engine, not all components are present on all locomotives and not all possible components are labeled in the illustration below.
1.Tender, 2.Cab, 3.Whistle, 4.Reach rod, 5.Safety valve, 6.Generator, 7.Sand dome, 8.Throttle Lever, 9.Steam dome. 10.Air pump, 11.Smoke box, 12.Main steam pipe, 13.Smoke box door, 14.Hand rail, 15.Trailing truck, 16 Foot board/Running board, 17.Frame, 18.Brake shoe and brake block, 19.Sand pipe, 20.Coupling rods, 21.Valve gear, 22.Connecting rod, 23.Piston rod, 24.Piston, 25.Valve, 26.Valve chest.
27.Firebox, 28.Boiler tubes, 29.Boiler, 30.Superheater tubes, 31.Throttle valve, 32.Superheater, 33.Chimney 34.Headlight, 35.Brake hose, 36.Water compartment, 37.Coal bunker, 38.Grate, 39. Ashpan hopper, 40.Journal box, 41.Equalizing beams, 42.Leaf Springs, 43.Driving wheel, 44.Pedestal or saddle, 45.Blast pipe, 46.Pilot truck, 47.Coupling.
Image courtesy: WikiMedia Commons (Panther)