In order to determine the effect of shrouding the rotor blades of a particular turbine design on the over-all turbine performance, a con-servatively designed experimental cold-air turbine was investigated both with and without a shroud band on the rotor blades. The tip of the rotor blade was oriented toward the tangential direction so that the adverse effect of blade-tip scraping would not be appreciable. It was found that the addition of a shroud to the turbine-rotor blades had only a slight effect and did not improve the turbine performance. The effi¬ciency for the unshrouded-rotor configuration was about one point higher than for the shrouded rotor.
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