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S Scale Locomotives MPSM (Modern Prototypical Scale Modeling)
S Scale Locomotives suitable for use on layouts set in the last 20 years (1978-1998)

Still in  wide use  (1998) on shortlines, regional & class 1 railroads (as applicable).
 
Greenbriar 
River Raisin 
Steam Depot
S-Helper
American Models 
American Models 
Overland 
American Models 
River Raisin 
River Raisin 
Overland 
Overland 
EMD GP30
GE 44 Tonner switcher
GE 44 Tonner switcher
EMD SW9 switcher
EMD GP9/18 ** 
EMD GP35
EMD GP38-2
EMD FP40H
EMD SD7
EMD SD9
EMD SD40-2
EMD SD50/60
** - can be converted to GP7, and chopnosed with Des Plaines Hobbies kit

The following were starting to cascade down to shortline use in the late 1970s. their use in 1998 is limited to industrial use or a very small number of shortlines, or preserved locomotives leased to shortlines.
American Models
Railmaster
Railmaster
Sunset/Miller
Railmaster
Railmaster 
American Models
Railmaster 
Overland 
Overland 
Overland 
American Models 
Omnicom 
Wabash Valley 
American Models 
American Models 
BLW S12 switcher 
EMD NW2 switcher
ALCO S2/4 switcher
ALCO S4 switcher
ALCO RS1 
ALCO RS3
ALCO RS3
ALCO RSD4/5
ALCO RS11
MLW  RS18
ALCO RS32
ALCO FA2 & FB-2 unit
BLW RF-16
EMD F7 & F7B
EMD FP7
EMD FB
It is recognised that the above division is subjective - study your prototype to guide you.

American Models ALCO PA not listed nearly all(?) withdrawn by late 1970s. AF GP20 not listed - Iím not sure how accurate it is?  Note some early brass is also not listed.

Locomotive wish list.

A subjective list but with the criteria that the locomotives were in use in 1978 and are still in popular use in 1998.  Thus most of the GE U-boats (now fairly rare beasts - almost as much as Alcos) are not included..

EMD SD45
EMD SW 1500 switcher modern equivalent of the SW9
EMD MP15 remanufactured GP9
EMD GP38-2 or GP40 - increasingly being used by larger shortlines
EMD SD40-2 still the mainstay of a larger number of class 1&  regional railroads
plus
CF7 body kit for AM chassis.
GP8/10 Paducah Shops conversion kit
Flexcoil trucks for the SW9/1200
 

Modern Freight Cars
--
Kelvin White
Oxford England

Adapted for the web by Paul Yorke