Abstract New heat-transfer and pressure-drop data within a Reynolds-number range of 600 to 40,000 obtained from model 10-row in-line tube banks are presented in a conventional form. The new data are compared with previously reported results for similar surface arrangements. By a process of cross-plotting, heat-transfer and pressure-drop factors are shown as a function of tube-bank arrangement in a series of curves at constant Reynolds numbers. Correlations for tube-bank geometry are proposed and the precision with which they represent the new and previously published data is discussed.