本論文之目的係利用DATCOM法估算一無人飛機Ce-71UAV之氣動力係數與導數，並進一步分析其側向穩定特性。DATCOM法可分為利用紙本DATCOM內之經驗公式與圖表估算之paper DATCOM與利用電腦程式估算之digital DATCOM，前者需耗費大量時間、人力與物力，後者則在分析一些非傳統飛機時所得到之輸出檔常常會發生沒有數據的情況。為了能夠同時達成節省時間、人力、物力與完整分析此無人飛機Ce-71UAV之目的，本論文中自行發展一可用以分析飛機之電腦程式資料庫。此電腦程式資料庫係以分析無人飛機Ce-71UAV時所使用到paper DATCOM內之經驗公式與圖表為基礎所建立，在圖部分，先測量其數據，並將結果列成表，再利用模糊模式與立方仿樣法將表之資訊完整建立在程式中，最後將前述所建立之資訊代入經驗公式建立成一函式模組，以完成氣動力係數及空氣導數的估算，其中亦包含側向穩定分析之部分，以方便將來的修改與類似的設計所使用。

The objective of this thesis is to estimate aerodynamic coefficients and stability derivatives for an Unmanned Aerial Vehicle (UAV) dubbed“Ce-71” by the DATCOM method, and further to analyze its lateral stability. The DATCOM method can be divided into two categories: “paper DATCOM,” which is in the form of Empirical Formulae, Figures and Tables; and “digital DATCOM,” which is in the form of computer codes. By using the former, it needs to consume a lot of time, manpower, and resources; while by using the latter, it usually gets no output data when analyzing an untypical aircraft. To solve these problems, this thesis develops a computer program based on the Empirical Formulae, Figures and Tables in the “paper DATCOM” for the analysis of Ce-71UAV. In those figures, the data are first measured, and the results are converted into tables. Then computer programs based on Fuzzy model and Cubic Spline theory are developed to interpolate the tables. Finally, Empirical Formulae are implemented with subroutines or functions in the programs. These programs as a whole can be used to estimate aerodynamic coefficients and stability derivatives, analyze lateral stability characteristics, and facilitate the modification and design of the Ce-71UAV and Ce-71UAV-like in the future.

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