IAF-00-V . 4 . 01 NASA ' s Hyper-X Program
This paper provides an overview of the objectives and status of the Hyper-X program which is tailored to move hypersonic, airbreathing vehicle technology from the laboratory environment to the flight environment, the last stage preceding prototype development. The first Hyper-X research vehicle (HXRV), designated X-43, is being prepared at the Dryden Flight Research Center for flight at Mach 7 in the near future. In addition, the associated booster and vehicle-to-booster adapter are being prepared for flight and flight test preparations are well underway. Extensive risk reduction activities for the first flight and non-recurring design for the Mach 10 X-43 (3rd flight) are nearing completion. The Mach 7 flight of the X-43 will be the first flight of an airframe-integrated scramjet-powered vehicle.
Hyper-X Engine Testing in the NASA Langley 8-Foot High Temperature Tunnel
Airframe-integrated scramjet engine tests have been completed at Mach 7 in NASA Langley 8-Foot High Temperature Tunnel under the Hyper-X program. These tests provided critical engine data as well as design and database verification for the Mach 7 flight tests of the Hyper-X research vehicle (X-43), which will provide the first-ever airframe-integrated scramjet flight data. The first model tested was the Hyper-X Engine Model (HXEM) and the second was the Hyper-X Flight Engine (HXFE). The HXEM, a partial-width, full-height engine that is mounted on an airframe structure to simulate the forebody features of the X-43, was tested to provide data linking flowpath development databases to the complete airframe-integrated three-dimensional flight configuration and to isolate effects of ground testing conditions and techniques. The HXFE, an exact geometric representation of the X-43 scramjet engine mounted on an airframe structure that duplicates the entire three-dimensional propulsion flowpath from the vehicle leading edge to the vehicle base, was tested to verify the complete design as it will be flight tested. This paper presents an overview of these two tests, their importance to the Hyper-X program, and the significance of their contribution to scramjet database development.
Co-operative categorization in civil engineering
In the paper we indicate the way to allow the coexistence of multiple structures that are mutually supportive, but not mutually exclusive. It allows less organized users to classify entities according to their suitable structure, whilst leaving the possibility for specialised users to classify these entities into related field classification systems or domain ontologies, in mutually beneficial cooperation. Replacing the reductionist enumerative structure with multiplicative categorization should bring organizational and terminological flexibility that will allow future updates without disrupting the existing categorization. It allows one to use parallel hierarchical branches of categories according to aspects and classify the entity into several branches at the same time. It should allow users the freedom to create their own structures without disrupting the structures of other user groups. Such structures could coexist happily side by side. The aim is to indicate the model of an independent data organization system in building design in a multilingual environment, connected through diverse CAD, GIS, BIM, CAFM applications, ECM, CDE, emails, databases and file systems.