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0.178 centimeter Reading 061 centimeter Reading 8-8 at design assumed operating line Axial blade tip clearance centimeter Reading Rotative CLEARANCE ON OVERALL clearance was increased clearances from 0.061 closed skewed slots closed-skewed-slot decreased with increasing design speed percent Effects of rotor-blade EFFECTS OF TIP efficiency decreased efficiency design speed Figure 11 Four nominal nonrotating increasing clearance increasing tip clearance kg/sec ratio ratio kilograms per second Lewis Research Center margin was obtained N/cm nominal nonrotating rotor Nominal nonrotating tip nominal tip clearances nonrotating rotor blade nonrotating tip clearance open skewed slots overall performance peak efficiency percent of design Performing Organization plenum chamber Pressure Temperature Adiabatic ratio and efficiency ratio efficiency design ratio efficiency percent ratio ratio efficiency Reading Rotative Airflow Rotor blade tip rotor tip rotor-blade tip clearance shown in figure stage was tested stall condition stall line stall point stator Temperature Adiabatic speed test stage thermocouple total-temperature transonic fan stage