Experimental studies of heat transfer to blunt bodies were performed in the transition regime. The studies were at Mach numbers of 6.38 and 7.6 at stagnation temperatures of 500, 600 and 700 K. The heat flux was measured using slug gauges inserted in Macor models. The data is presented in terms of non dimensional parameters such as Stanton number, Knudsen number and Cheng's rarefaction parameter. © 2001 American Institute of Physics.