Kylchap

However, it first came into prominence in 1929 when applied to compound Pacific No 3566 which combined enlarged steam circuits, increased superheat, feedwater heater, thermic syphon, Lentz poppet valves with double Kylchap exhaust extractors and chimneys.

[1] Sir Nigel Gresley of the LNER became a proponent when he incorporated double Kylchap exhausts into four of his A4 Pacifics, including the world speed record holder Mallard.

Arthur Peppercorn's post-war LNER Pacifics also incorporated them, including preserved A2 532 Blue Peter, and the recreated A1 Tornado.

[citation needed] The only other nation to take the Kylchap system in quantity was Czechoslovakia, where all later standard gauge steam locomotives used the design.

The noted Argentinian engineer, Livio Dante Porta, designed several: the Kylpor, Lempor and Lemprex systems.