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Ragnar's HO Model Trains Weeb Site |
| Wheel Arrangement |
| Whyte Symbol | Wheels front to back | Loco Type |
| 0-4-0 | OO | 4-wheel switcher |
| 0-6-0 | OOO | 6-wheel switcher |
| 0-8-0 | OOOO | 8-wheel switcher |
| 0-8-8-0 | OOOO OOOO | Mallet (Articulated) |
| 0-10-0 | OOOOO | 10-wheel switcher |
| 2-6-0 | oOOO | Mogul |
| 2-6-2 | oOOOo | Prarie |
| 0-6-6-0 | OOO OOO | Mallet (Cornpound) |
| 2-6-6-2 | oOOO OOOo | Mallet (Articulated) |
| 2-6-6-4 | oOOO OOOoo | Mallet (Articulated) |
| 2-6-6-6 | oOOO OOOooo | Allegheny |
| 2-8-0 | oOOOO | Consolidation |
| 2-8-2 | oOOOOo | Mikado |
| 2-8-4 | oOOOOoo | Berkshire |
| 2-8-8-0 | oOOOO OOOO | Mallet (Articulated) |
| 2-8-8-2 | oOOOO OOOOo | Mallet (Articulated) |
| 2-8-8-4 | oOOOO OOOOoo | Yellowstoiie |
| 2-8-8-8-2 | oOOOO OOOO OOOOo | Triple Articulated |
| 2-10-0 | oOOOOO | Decapod |
| 2-10-2 | oOOOOOo | Santa Fe |
| 2-10-4 | oOOOOOoo | Texas |
| 2-10-10-2 | oOOOOO OOOOOo | Mallet (Articulated) |
| 4-4-0 | ooOO | Ainerican |
| 4-4-2 | ooOOo | Atlantic |
| 4-4-4 | ooOOoo | Reading |
| 4-4-4-4 | ooOO OOoo | 4-Cyl Non-Artictilated |
| 4-4-6-4 | ooOO OOOoo | 4-Cyl Non-Artictilated |
| 4-6-0 | ooOOO | 10-wheel |
| 4-6-2 | ooOOOo | Pacific |
| 4-6-4 | ooOOOoo | Hudson |
| 4-6-4-4 | ooOOO OOOO | 4-Cyl Non-Articulated |
| 4-6-6 | ooOOO OOO | Tank |
| 4-6-6-4 | ooOOO OOOoo | 4-Cyl Articulated |
| 4-8-0 | ooOOOO | 12-wheel |
| 4-8-2 | ooOOOOo | Mountain |
| 4-8-4 | ooOOOOoo | Northern |
| 4-8-8-2 | ooOOOO OOOOo | Mallet (Articulated) |
| 4-8-8-4 | ooOOOO OOOOoo | Mallet (Articulated) |
| 4-10-0 | ooOOOOO | Mastadon |
| 4-10-2 | ooOOOOOo | Southern Pacific |
| 4-12-2 | ooOOOOOOo | Union Pacific |
There is a cool thing about steam engines, they are classified by the numbers and use of their wheels. Most important are the drive wheels (the big wheels) but also significant are the stearing wheels (the smaller front wheels) and any trailling wheels (the smaller wheels in the back). This is usually written as the Whyte number/symbol. Often made of three numbers, four or more for articulating engines, each number basicaly refers to the number of wheels in each truck / bogie.
There have been and still are a few strange combinations, many in Africa where the track was made light weight and heavy engines needed a lot of wheels to spred out thir weight. So there were some cool arrangemends were two small engines were combined into one big or long articulated engine, like
4-8-4+4-8-4 ooOOOOoo ooOOOOoo
really looks cool, let me tell ya
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© Ragnar Torfason
2006 March 28 |