Dr. Allan Paull joined the growing Space Show guest family with this very special Thursday evening program to discuss the Australian HyShot Scramjet Test and Flight Program and scramjet technology in general. We started the interview with a good basic explanation of scramjet technology and where we are today with developing scramjets as well as what the future might hold for scramjets. Many listeners asked technical questions about scramjet engines, rocket and flight parameters, fuel used, ablative materials and temperature and operational windows for scramjet vehicles.