260px|thumb|right|The Kylchap exhaust system 260px|thumb|right|Double Kylchap exhaust of the Spanish RENFE 141 F 2416 (smokebox cut open), in the Delicias Museum, Madrid
260px|thumb|right|The Kylchap exhaust system 260px|thumb|right|Double Kylchap exhaust of the Spanish RENFE 141 F 2416 (smokebox cut open), in the Delicias Museum, Madrid
The Kylchap steam locomotive exhaust system was designed and patented by French steam engineer André Chapelon, using a second-stage nozzle designed by the Finnish engineer Kyösti Kylälä, known as the Kylälä spreader, with the composite name KylChap being given the design.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).