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Channels with crossing finning find wide use in the cooling paths of high temperature gas turbine blade systems. At different times, different institutions carried out experimental investigations of heat transfer and pressure drop in channels with coplanar finning of opposite walls for obtaining semiempirical depen dences of Nusselt criteria (dimensionless heat transfer coefficients) and pressure drop coefficients on the operating Reynolds number and relative geometrical parameters (or their complexes). The shape of experi mental channels, the conditions of experiments, and the used variables were selected so that they would be most suited for solving particular practical tasks. Therefore, the results obtained in processing the experimen tal data have large scatter and limited use. This article considers the results from experimental investigations of different authors. In comparing the results, additional calculations were carried out for bringing the math ematical correlations to the form of dependences from the same variables. Generalization of the results is car ried out. In the final analysis, universal correlations are obtained for determining the pressure drop coeffi cients and Nusselt number values for the flow of working medium in channels with coplanar finning.