RIPPEN-based Prognostic Enhancements to Naval Diagnostic Systems

Not Available BMDO has a continuing need for advanced propulsion technologies for both TMD and NMD applications. A particularly critical requirement is for rocket propellants with higher performance than state-of-the-art materials. The ability to intercept ballistic or tactical missiles puts a premium on the accelerating power of propulsion systems. It is known that the difluoramino group is superior to other common oxidizing functional groups as a source of combustion energy in combination with hydrocarbon or metallic fuels. With boron-based fuels, BOF is formed, which is non-condensable. The elimination of two-phase flow losses can result in 3-4% increase in performance. It has been difficult, however, to devise synthetic schemes for the preparation of propellant ingredients containing difluoramino groups that have sufficient overall content of oxidizing groups to meet formulation requirements. Under the proposed program, a little-studied method for the preparation of compounds with difluoramino and nitro groups will be elaborated for the synthesis of practical propellant ingredients. The overall simplicity of the approach means that useful target compounds can potentially be attained at substantially lower cost than those using methods currently under intensive study