The South African Class 26 Red Devil, the most advanced steam locomotive ever built, gas producer firebox and enlarged exhaust, standing on the Karoo plateau.
What it was used for
Coal traffic in South Africa, produced in 1981 by rebuilding a machine of 1953.
What was new
David Wardale fitted the gas-producer combustion system: the coal gasifies on the grate and burns above it. Consumption fell markedly, and the machine appeared in 1981 — when steam was held to be a closed subject. The last serious development of the steam locomotive came when nobody was watching.
Connections
Every connection names its kind. “Forerunner” on its own would be a claim.