#TITLE_ALTERNATIVE#

• Main Author: IQBAL FAISAL (NIM : 136 05 048); Pembimbing 1 : Dr. Ir. Djoko Sardjadi ; Pembimbing 2 : Dr, MUHAMMAD
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/16572
• Institution: Institut Teknologi Bandung

As an archipelagic state, which consists of thousands of islands, Indonesia needs an effective inter island air transportation with simple and easy operation features, low maintenance and very good maneuverability. Hence, a FAR 23 type aircraft is needed to fulfill characteristics, such as; ability to take off and land on a very short distance and unprepared runway, as well as ascend and descend flight profile. In order to meet those flight characteristics, the aircraft wing needs a unique airfoil that able to generate high lift and a high aerodynamic efficiency. Thus it is important to optimize the C1 Max from multi element airfoil used nowadays by rearranging the gap and the overlap toward optimum position. <br /> <br /> <br /> <br /> <br /> The multi element airfoil was analyzed by MSES software. MSES is a software that uses the Euler equation coupled with Boundary Layer equation, so that the boundary layer or viscous phenomenon can be predicted well. This is very important for multi element airfoil case, because it needs a good viscous phenomenon prediction on gap among elements airfoil. The optimization of C1 Max and aerodynamic efficiency were carried out by rearranging the gap and the overlap of double slotted flap at Landing configuration (DF 40 o)The research was spread from gap 0.5% chord until 7% chord and overlap from 6.7% chord until -3.3% chord. The result shows that the significant increment of C1 Max and aerodynamic efficiency. C1 Max.increases up to 1.93 from the value of C1 Max clean configuration. The result agreed well with semi-empirical reference (McCormick), which said that the increment of C1 Max for double-slotted configuration can achieve value 1.9. The aerodynamic efficiency of optimum configuration also has a better value than existing configuration.