Preliminary Design of Retractable LandingGear System for SAFAT03 Aircraft

Abstract

Landing gears are used during take-off and landing process of aircrafts, there are two types of landing gears fixed and retractable. This thesis investigates the possibility of convert fixed landing gear of two seat light aircraft safat03 to retractable so can increase capabilities of safat03. The main objective is to deign mechanism to retract safat03 landing gear completely inside its body, and make model to test retraction process. Initially, according to safat03 fixed landing gear drawings, retractable mechanism is designed base on three point’s path generation method. After that retractable mechanism model is done by catia software and simulated to check intersection with structure. Then electrical rotary actuators are proposed as consequence of conceptual loads calculation on main landing gear retractable mechanism. Furthermore, Landing gear and mechanism are scaled down five times, and manufactured by three dimension printer. Then stepper motor is selected to rotate the scale down model, and light emitting diodes (LED) are used to simulate landing gear lights as in cockpit. Therefore, stepper motor and LEDs are controlled via Arduino microcontroller. Evaluation of retractable mechanism kinematics simulation shows obviously interference between landing gear and structure. Also observations of scale down model demonstrates retractable mechanism moves according to prescribe path. Finally this thesis focuses on kinematic design of retractable mechanism of main landing gear. As well as, conducts test of main landing gear by made scale down model. Despite this study don’t cover all aspects of design, but from kinematic perspective convert saftat03 to retractable landing gear needs big modification in wing and fuselage structure of safat03 aircraft.