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Heat and mass transfer for condensation from a gas-vapor-mixture with very high Reynolds-numbers was analyzed on a theoretical and experimental basis. A mixture of monofluorotrichloromethane (R 11) and nitrogen was cooled in a vertical brass tube. The gas concentrations and the Reynolds-numbers comprised the ranges XG t+~0.01...0.42 and Re t+~70,000...450, 000; the Reynolds-number of the condensate film flow reached values of above 1000. A mathematical method was developed to show the various values as function of the main parameters, such as gas concentration, Reynolds-number of the mixture and cooling length.