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The Ultimate Steam Page

The Ultimate Steam Page

Steam Improvements of the Last 30 Years

updated 02/19/2000

South African Railways Class 26 4-8-4 #3450

photo courtesy of David Guelpa

This locomotive was extensively modified in the early 1980s by David Wardale, and was intended as the prototype for a fleet of improved steam locomotives for the South African Railways. Originally a class 25NC, #3450 was equipped with a dual Lempor exhaust system, Gas Producer Combusion System, enlarged superheater (using a header from a GMAM Garratt), feedwater heater, enlarged steam chests, improved piston valves, compressed air sanding, an enlarged coal bunker, and other improvements. During testing, the locomotive proved capable of achieving nearly 5000 DBHP, believed to be the highest output attained by any locomotive on Cape Gauge.