For high-speed turboshaft engines and experimental turbines, we offer the Kahn Series 404 dynamometers. Equipped with smooth disc power elements that absorb power by viscous shear rather than through highly turbulent vortex formation, the Series 404 are the only high-speed hydraulic dynamometers in their power class which carry a 5000 hour/60 month warranty against cavitation damage. Operating experience in the field has shown that the actual life of the power elements is well in excess of 10,000 operating hours.