NACA research memorandum RM (series). L57D18c. Preliminary results from free-flight investigation of boundary-layer transition and heat transfer on highly polished 8-inch diameter hemisphere-cylinder at Mach numbers up to 3 and Reynolds, numbers based on length of 1 foot up to 17.7 x 10 8 [with list of references]; by James R. Hall, Katherine C. Speegle, and Robert O. Piland.