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High-Speed Experimental Fly Vehicles - International (HEXAFLY-INT)
Start date: Apr 1, 2014, End date: Mar 31, 2019 PROJECT  FINISHED 

The HEXAFLY-INT project aims to flight test an experimental vehicle above Mach 7 to verify its potential for a high aerodynamic efficiency during a free-flight while guaranteeing a large internal volume. The feasibility for a 3m long vehicle was demonstrated during the European L0 precursor project HEXAFLY. Its realization will now be enabled on an international scale underlining the need for global cooperation in case of a future deployment of a high-speed cruiser.This flight opportunity will increase drastically the Technology Readiness Level of developments realized in previous high-speed EC projects such as ATLLAS I & II and LAPCAT I & II.The different technologies and methodologies which need experimental flight testing at high speed are grouped around the major axes of HEXAFLY-INT:1. High-Speed Vehicle Concepts2. High-Speed Aerodynamics3. High-Temperature Materials and Structures4. High-Speed Flight Control5. High-Speed Environmental ImpactTo realize this experimental flight test, different consecutive steps are planned each followed by a critical review together with international partners:– updated of the mission profile based upon the feasibility study– a detailed design of a high-speed experimental flight vehicle– selection and manufacturing of ground-tested technologies and systems– assembly, integration and testing of the experimental flight test vehicle– identification and procurement of the most promising flight platform(s)The design of the experimental high-speed cruise vehicle will be the main driver and challenge in this project with following scientific objectives:- an aerodynamic balance at a cruise Mach number higher than 7- an integrated conceptual design demonstrating a combined volumetric and aerodynamic efficiency- making maximum use of developed advanced high-temperature materials
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