In rail transport, a wheel arrangement or wheel configuration is a system of classifying the way in which wheels are distributed under a locomotive.[1] Several notations exist to describe the wheel assemblies of a locomotive by type, position, and connections, with the adopted notations varying by country. Within a given country, different notations may also be employed for different kinds of locomotives, such as steam, electric, and diesel powered. Especially in steam days, wheel arrangement was an important attribute of a locomotive because there were many different types of layout adopted, each wheel being optimised for a different use (often with only some being actually "driven"). Modern diesel and electric locomotives are much more uniform, usually with all axles driven. Contents 1 Major notation schemes 2 Comparison of wheel arrangements and wheel picture 3 See also 4 References Major notation schemes[edit] Wikimedia Commons has media related to Wheel arrangements. The main notations are the
Comparison of wheel arrangements and wheel picture[edit] VDEV/VMEV/UIC-System Whyte-Notation American name picture scheme locomotive front is to the left A1 0-2-2 Oo A2 0-2-4 Ooo 1A 2-2-0 Planet oO 1A1 2-2-2 Patentee oOo 1A2 2-2-4 oOoo 2′A 4-2-0 Crampton, Norris, Jervis ooO 2′A1 4-2-2 Single Driver ooOo 2A2 4-2-4 ooOoo 3A 6-2-0 Crampton oooO N/A 0-3-0 OOO B 0-4-0 Four-Wheel-Switcher OO B1 0-4-2 OOo B2′ 0-4-4 Forney OOoo B3′ 0-4-6 OOooo 1B 2-4-0 Hanscom oOO 1′B1′ 2-4-2 Columbia oOOo 1B2′ 2-4-4 oOOoo 1B3′ 2-4-6 oOOooo 2′B 4-4-0 American, Eight-Wheeler ooOO 2′B1′ 4-4-2 Atlantic ooOOo 2′B2′ 4-4-4 Jubilee ooOOoo 2′B3′ 4-4-6 ooOOooo C 0-6-0 Six-Wheel-Switcher OOO C1 0-6-2 OOOo C2′ 0-6-4 OOOoo 1′C 2-6-0 Mogul oOOO 1′C1′ 2-6-2 Prairie oOOOo 1′C2′ 2-6-4 Adriatic oOOOoo 1′C3′ 2-6-6 oOOOooo 2′C 4-6-0 Ten-Wheeler ooOOO 2′C1′ 4-6-2 Pacific ooOOOo 2′C2′ 4-6-4 Hudson, Baltic ooOOOoo D 0-8-0 Eight-Wheel-Switcher OOOO D1 0-8-2 OOOOo D2′ 0-8-4 OOOOoo D3′ 0-8-6 OOOOooo 1′D 2-8-0 Consolidation oOOOO 1′D1′ 2-8-2 Mikado oOOOOo 1′D1′ 2-8-2T MacArthur oOOOOo (1′D1′)(1′D1′) 2-8-2+2-8-2 Double Mikado, Garrett oOOOOo+oOOOOo 1′D2′ 2-8-4 Berkshire oOOOOoo 1′D3′ 2-8-6 oOOOOooo 2′D 4-8-0 Twelve-Wheeler, Mastodon ooOOOO 2′D1′ 4-8-2 Mountain, Mohawk (NYC) ooOOOOo 2′D2′ 4-8-4 Northern, General Service (SP), Golden State (SP), Niagara (NYC), Wyoming ooOOOOoo 2D3 4-8-6 ooOOOOooo 3′D3′ 6-8-6 nameless (Pennsylvania Railroad Steam Turbine) oooOOOOooo E 0-10-0 Ten-Wheel Switcher OOOOO E1′ 0-10-2 Union OOOOOo 1′E 2-10-0 Decapod oOOOOO 2′E 4-10-0 Mastodon ooOOOOO 1′E1′ 2-10-2 Santa Fe oOOOOOo 1′E2′ 2-10-4 Texas oOOOOOoo 2′E1′ 4-10-2 Southern Pacific, Overland ooOOOOOo F 0-12-0 Pennsylvania, Twelve-Wheel-Switcher OOOOOO 1′F 2-12-0 Centipede oOOOOOO 1′F1′ 2-12-2 Javanic oOOOOOOo 2′F1′ 4-12-2 Union Pacific ooOOOOOOo 2′G2′ 4-14-4 ooOOOOOOOoo nameless (AA) 0-2-2-0 O O B′B 0-4-4-0 nameless (Mallet) OO OO B′B1 0-4-4-2 nameless (Mallet) OO OOo 2′BB2′ 4-4-4-4 nameless (Pennsylvania Railroad Duplex) ooOO OOoo 3′BB3′ 6-4-4-6 oooOO OOooo 2′CB2′ 4-6-4-4 nameless (Pennsylvania Railroad Duplex) ooOOO OOoo C′C 0-6-6-0 Erie (Mallet) OOO OOO (1′C)C 2-6-6-0 nameless (Mallet) oOOO OOO (1′C)C1′ 2-6-6-2 Mallet Mogul (SP), Prairie Mallet (ATSF) oOOO OOOo (1′C)C2′ 2-6-6-4 nameless (Simple articulated) oOOO OOOoo (2′C)C2′ 4-6-6-4 Challenger (Simple articulated) ooOOO OOOoo (1′C)C3′ 2-6-6-6 Allegheny (Mallet/Simple articulated) oOOO OOOooo D′D 0-8-8-0 Angus (Mallet) OOOO OOOO (1′D)D 2-8-8-0 Bullmoose (Mallet) oOOOO OOOO (1′D)D1′ 2-8-8-2 Chesapeake, Mallet consolidation (Mallet) oOOOO OOOOo (1′D)D2′ 2-8-8-4 Yellowstone (Mallet/Simple articulated) oOOOO OOOOoo (2′D)D1′ 4-8-8-2 Cab Forward (Simple articulated) ooOOOO OOOOo (2′D)D2′ 4-8-8-4 Big Boy (Simple articulated) ooOOOO OOOOoo (1′E)E1′ 2-10-10-2 Virginian (Mallet) oOOOOO+OOOOOo (2′C1′)(1′C2′) 4-6-2+2-6-4 Double Pacific (Garratt) ooOOOo+oOOOoo (2′C2′)(2′C2′) 4-6-4+4-6-4 Double Hudson (Garratt) ooOOOoo+ooOOOoo (2′D)(D2′) 4-8-0+0-8-4 Double Mastodon (Garratt) ooOOOO+OOOOoo (2′D1′)(1′D2′) 4-8-2+2-8-4 Double Mountain (Garratt) ooOOOOo+oOOOOoo (2′D2′)(2′D2′) 4-8-4+4-8-4 Double Northern (Garratt) ooOOOOoo+ooOOOOoo See also[edit]
Co-Co locomotives References[edit] ^ "Wheel Arrangements". Railway Technical Web Pages. 1 August 2011. Retrieved 1 August 2011. v t e
Cab positioning
Cab forward Sharknose Steeplecab Cab unit Hood unit Cowl unit Boxcab Dual Control Stand Wheel arrangement AAR wheel arrangement UIC classification Swiss classificat |