Tests in a combustion centrifuge demonstrated that the normal progression from laminar flamespeeds of about 0.3 m/s (in hydrocarbon-air mixtures) to turbulent flamespeeds of up to 6.1 m/s can be advanced to a third stage, where flamespeeds in excess of 19 m/s were measured. A theory explaining how centrifugal-force-enhanced buoyancy produces the increased flamespeeds was developed. This theory was applied to the results of a combustion centrifuge experiment, the design of a 38-cm-dia afterburner research rig, and eventually to the design of a full-scale afterburner, which was tested on a modern turbofan engine. The experimental results confirmed the theory and indicate a potential 2 percent reduction in specific fuel consumption. 16 figures.