Russian research on experimental hydrogen-fueled dual-mode scramjet: Conception and preflight tests

The experience of model dual-mode scramjet (DMSCRAM) creation and the main results of ground and preflight tests are analyzed in this paper beginning from the conception choice, goals, and working program implemented for abou t 15 years, preceding to the first flight test of hypersonic flight laborat ory. Design schemes for plane and axisymmetrical engine concept are examine d. The description of experimental test facilities, test instrumentation, a nd methods of readings treatment used in ground-test procedure of DMSCRAM a re given. The test results of ground model engine at Mach-number range M = 3.5-6.5 and ground test-results for flight type engine at M = 5 were cited and confirmed the durability and readiness of developed DMSCRAM for flight tests.