![]() Choi, Jong-In(2012).Analysis of Latent Means of Safety Consciousness in Aero Modelling Activity: Focusing on Society Members and Instructors. ![]() Third, through data analyses, a more scientific approach was made possible for competition operation. Second, flight altitude and sink rate were determined. First, the optimized lift-to-drag ratio according to angle of attack was obtained through airfoil data analysis. Statistical significance level was set at p < 0.05. Independent sample t-test was performed to determine inter-group difference. Mean (M) and standard deviation (SD) were calculated. All data were analyzed using SPSS version 18.0 for Windows. ![]() After each flight, data of each model were analyzed and sink rate with altitude was compared. After comparing the lift-to-drag ratio of lift coefficient and drag coefficient for the angle of attack, an altimeter was installed in each model aircraft. They flew twice each at Osom airfield in Hwasung city, Gyeonggi province, Korea under zero wind condition. Model aircraft of airfoil with a large under camber and model aircraft of airfoil with an LDA (low-drag airfoil) concept were constructed. Altitude Reached, set time, and sink rate were measured for a model aircraft of conventional airfoil with a large under camber and low airfoil (LDA) concept aircraft. The objective of this study was to investigate the effect of airfoil difference of F1A glider on gliding flight sink rate of model aircraft for improving competition score of F1A glider and providing basic data necessary for the development of model aircraft in Korea.
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