TUBOTHAL ® ELEMENTS CASE STORY The French company Snecma Moteurs is part of the Snecma aerospace propulsion and equipment group, which specializes, among other things, in the manu- facture of engines for civil and military aircraft, rocket engines, turbines, and aeronautical equipment such as landing gear, braking systems, reverse thrusters, engine components, and much more besides. THE CHALLENGE At Gennevilliers, north of Paris, the company maintains a casting plant with a 650 kW electric furnace with a rotary hearth code-named 195E. The internal diameter of the charge chamber is 5.30 m (17.4 ft) and the height 1.20 m (3.9 ft), with fiber insulation. To meet the requirements for temperature precision in an aeronautic casting plant (Class 7), where 90 to 95% of the components ar

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