Adolph Giesl-Gieslingen

In 1929 the director, Arno Demmer, sent him to the United States, where he stayed until 1938, working on the New York Central Railroad testing a Kylala blastpipe.

He developed the Giesl ejector for steam locomotives, which he patented and allowed to be sold by the Schoeller-Bleckmann works.

The first notable application of this was to an Austrian 2-8-4 where fitting of the Giesl ejector produced a 25% increase in power output and a small saving in coal.

92250 was tested at Rugby with a Giesl ejector which demonstrated its effectiveness but due to imminent dieselisation no other locomotives were so fitted.

The effectiveness of the Giesl ejector, being slightly better than the Kylchap exhaust, has led to two preserved locomotives in the UK being fitted with it; Bulleid Pacific No.