AAWSAP DIRD, MHD Air Breathing Propulsion and Power for Aerospace Applications, November 2010

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Figure 7. Schematic of Ajax Hypersonic Vehicle Concept. The upper and
lower pictures represent the same concept, but were published by the authors (A.
Kuranov et al.) at different times.
The key idea of the Ajax is that, with propulsion, aerodynamic, and heat
protection system for hypersonic vehicles hitting their theoretical and practical
limits, the only way beyond these limits is smart management of energy (i.e.,
taking energy from the surrounding flow and putting that energy where it is
needed for propulsion benefits). The following three major concepts/systems are
included in Ajax: 24
• Endothermic fuel conversion. A mixture of hydrocarbon fuel (similar to
kerosene) and water initially stored on board is used to cool the external
surfaces and engine walls, and the heat transferred to the mixture is used in
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