Investigation of effectiveness of air-heating a hollow steel propeller for protection against icing : 25-percent partitioned blades

Donald R. Mulholland, Porter J. Perkins
May 1948

The icing protection obtained from an internally air-heated propeller blade partitioned to confine the heated air forward of 25-percent chord was investigated in the NACA Cleveland icing research tunnel. A production-model hollow steel propeller was modified with an internal radial partition at 25-percent chord and with shank and tip openings to admit and exhaust the heated air.

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