Kylchap

A Kylchap - exhaust installation is a further development of the simple blowing tube, a steam jet blower as a suction of steam locomotives. The name is a combination of the names of the two developers: the Finnish engineer Kyosti Kylälä and the French André Chapelon.

This is a combined parallel and series connection of the jet blower stages, which significantly improved the performance of the induced draft and simultaneously a lower back pressure for the Zylinderabdampf enabled: From the steam nozzle of the first stage of the motive steam strikes the developed Kylälä collector ( shown in yellow ), which was composed of four parallel-connected triangular nozzle. From here the steam -gas mixture passed into a second mixing nozzle, the exhaust ansaugte further and ultimately blowing off into the fireplace.

Kyläläs nozzle was originally designed to reduce flying sparks and to achieve a more uniform suction. It was Chapelon, who recognized that the nozzle would make effective the suction in the multistage arrangement.

The Kylchap came in many French and British locomotives to use, here among so famous as the LNER " Peppercorn ", " Flying Scotsman " and " Mallard ". The Czech ČSD used the Kylchap in many of their series, including 387.0, 475.1, 477.0, 486.0, 498.0, 498.1 and 556.0.