| FUEL | CONVERSION (into mec. energy) | TRANSMISSION (generation to application) |
|---|---|---|
| coal | internal combustion (engine) | electric |
| diesel | external combustion (steam) | hydraulic |
| oil | steam turbine | direct (geared, side rods) |
| gasoline | combustion turbine | recipricating (connecting rods) |
| electricity | electrical (transformer) | |
| wood |
Theoreticly all combinations are possible, though some make no sense. Turbines, for example, are already rotating so there is no need for reciprocating rods. The most common examples are:
diesel-internal combustion-electric (diesel electric)
coal-external combustion-recipricating (conventional steam engine)
oil-external combustion-recipricating (conventional steam engine)
wood-external combustion-recipricating (early steam engine)
gasoline-combustion turbine-direct (gas-turbine)
electricity-electrical-electric (Milwaukee Road Bi-Polar electrics)
electricity-electrical-direct (PRR GG-1)
electricity-electrical-recipricating (PRR DD-1)
coal-external combustion-direct
oil-external combustion-direct
wood-external combustion-direct
coal-internal combustion-electric (GE experimental coal slurry)
coal-steam turbine-electric (N&W's Jawn Henry, C&O's experimental M1's)
coal-steam turbine-direct (Pensylvania's S-2)
diesel-internal combustion-electric (UP's Big Blows)
diesel-internal combustion-hydraulic (D&RG/SP demonstrators)
PILOT TRUCK WHEELS - DRIVE WHEELS - TRAILING TRUCK WHEELS 0-anything-0 Switcher 4-4-0 American 4-4-2 Atlantic 2-6-2 Prarie 2-6-0 Mogul 4-6-2 Pacific 4-6-4 Hudson 2-8-0 Consolidation 2-8-2 Mikado 2-8-4 Berkshire 4-8-0 Mastadon 4-8-2 Mountain 4-8-4 Northern 2-10-0 Deacpod 4-6-6-4 Challenger 4-8-8-4 Big Boy 4-8-8-8-4 Tripex 4-6-0 Tenwheeler 4-10-0 Twelvewheeler 2-10-2 Santa Fe 2-10-4 Texas 2-4-2 Columbia 2-6-6-6 Allegeney 4-4-4 A Baltimore 4-6-4-4 Pennsylvania 4-10-0 Mastodon 4-10-2 Southern Pacific 4-12-2 Union Pacific
For a more complete list see Wheel Arrangements of North American Steam Locomotives or Wes Barris has an extensive list at his Steam Locomotive Information pages.
A = single powered axle
B = double powered axle
C = triple powered axle
D = quadruple powered axle
1 = single unpowered axle
2 = double unpowered axle
3 = triple unpowered axle
4 = quadruple unpowered axle
Sometimes these are used with an o (Ao, Co) to indicate independent drive.
- = trucks mounted on the same frame or subframe
+ = trucks mounted on different frames (frames hinged together
or pivoted on main frame)
For example:
B-B GM GP's, BL-2, FT, F's, GE U__B's
C-C GM SD's, GE U__C's, E44
A1A-A1A E's, PA's
2-B+B-2 PRR DD1, DD2
1-C+C-1 PRR FF2
2-C+C-2 PRR GG1
1-B-D-D-B-1 MILW EP-2
