1. Green' recognized this problem in 1970, stating that the available 2D experiments showed too great a disparity to serve as the basis of a correlation. In io years this situation has changed somewhat with the advent of new experiments. In particular, there are now a t least three highquality data 3ets availablelo-12 on the Re and 6 scaling of compression corner interactions for the same nominal flow conditions (equilibrium, adiabatic turbulent boundary layers at M ?r 3). r d