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The effects of wind on corona discharges from HV dc transmission lines were studied using two laboratory models. One model was used for studying the corona vs. wind characteristics of discrete metal projections from smooth conductors, while the other dealt with corona on stranded conductors. The investigation encompassed both 2-conductor and conductor-to-plane configurations at wind speeds up to 50 miles per hour. It was found that both corona loss and radio-influence voltages (RIV) were sensitive to wind in the 2-conductor configuration but not in the conductor-to- plane configuration. The results are correlated with previous findings and with the theories of corona discharges.