Details of the field performance calculations and a description of the aspects of Computer Aided Design (CAD) work for the airbrake and arrester hook installation of the TF89 project aircraft are presented. The airbrakes are designed to operate at any speed up to the maximum design speed of the aircraft, with the deployment angle being limited by a sophisticated control system. Finite element methods of analysis are employed as the primary design tool. Two structures are evaluated, one of conventional aluminum alloy and one of carbon composite material. The final design is a composite structure which is evaluated for static stength and fatigue stength. A suitable construction method is also investigated. The estimated weight of the airbrake installation is 64 kg. The arrester hook installation is designed to slow the aircraft to rest without damage to the aircraft structure, even at abnormally high landing weight and cable engagement speed. A dynamic analysis of an arrested landing is used to determine the nose slam characteristics of the aircraft. The installation incorporates a damping system to prevent the hook from bouncing on contact with the runway. The estimated weight of the arrester hook installation is 22 kg. The takeoff and landing distances are calculated to be 533 m and 884 m respectively. The landing distance is satisfactory, but the takeoff distance exceeds the specification distance by 33 m. CAD methods are employed in the airbrake and arrester hook design and CAD generated drawings are included.
TF89 Design Project Airbrake and Arrester Hook Design
1990
224 pages
Report
No indication
English
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