Ramjet engines: Project Pluto, Air-augmented rocket, Ramjet, Scramjet, BrahMos, Reaction Engines SABRE, Sea Dart, Pratt & Whitney J58  (English, Paperback, LLC Books, LLC Books, Source Wikipedia)

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 35. Chapters: Project Pluto, Air-augmented rocket, Ramjet, Scramjet, BrahMos, Reaction Engines SABRE, Sea Dart, Pratt & Whitney J58, 2K11 Krug, Marquardt Corporation, Crow, Moskit, P-700 Granit, Hsiung Feng III, C-301, The Hy-V Scramjet Flight Experiment, P-800 Oniks, Albert Fono, Burya, GQM-163 Coyote, Andre Turcat, Rene Lorin, S225XR, EKR, Kronach Lorin, Bristol Thor, Bristol Odin, Marquardt RJ43. Excerpt: A scramjet (supersonic combustion ramjet) is a variant of a ramjet airbreathing jet engine in which combustion takes place in supersonic airflow. As in ramjets, a scramjet relies on high vehicle speed to forcefully compress and decelerate the incoming air before combustion (hence ramjet), but whereas a ramjet decelerates the air to subsonic velocities before combustion, airflow in a scramjet is supersonic throughout the entire engine. This allows the scramjet to efficiently operate at extremely high speeds: theoretical projections place the top speed of a scramjet between Mach 12 and Mach 24, which is near orbital velocity. The fastest air-breathing aircraft is a SCRAM jet design, the NASA X-43A which reached Mach 9.8. For comparison, the second fastest air-breathing aircraft, the manned SR-71 Blackbird, has a cruising speed of Mach 3.2. The scramjet is composed of three basic components: a converging inlet, where incoming air is compressed and decelerated; a combustor, where gaseous fuel is burned with atmospheric oxygen to produce heat; and a diverging nozzle, where the heated air is accelerated to produce thrust. Unlike a typical jet engine, such as a turbojet or turbofan engine, a scramjet does not use rotating, fan-like components to compress the air; rather, the achievable speed of the aircraft moving through the atmosphere causes the air to compress within the inlet. As such, no moving parts are needed in a scramjet, w...