REPORT

2019 Spring Semester Flying Robot Project Team B Article 3May 15, 2019

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We mainly did three things this week.
First, we checked the calculation we did in the past. We relied on the calculations of the main wing surface, horizontal and vertical stabilizer surface, center of gravity and so on done by one student. We did this because we were worried that if there were some mistakes in the calculations, we will have to make major modifications to the design. All calculations except the vertical stabilizer surface agreed with the calculation done before. We were not sure if we should use the whole surface of the main wing or half the wing, since we are making a biplane, to calculate the stabilizer surface, we decided to increase the surface just in case.
Secondly, we decided the structure of the main wing by to an aircraft made in the past. Now, the CAD group is working on the design so that we can laser cut the ribs in the next class.
Third, we started the preparations for making the stabilizers. Since the stabilizers are not so complex as the main wing and are made only by straight components which are easy to cut precisely by hand, we decided to assemble the stabilizers first. Two of us drew patterns of the structures of the stabilizers on paper. We will cut the materials, align them on the pattern and glue them together in the next class.
We are looking forward to seeing our own aircraft not in the computer display but in our hands. 今日は主に3つのことをしました。
一つ目は検算です。これまで主翼面積、水平、垂直尾翼面積、重心などの計算を一人に任せており、ここでミスがあると後々大幅な設計の変更を強いられるため、他の二人で計算の確認を行いました。尾翼面積の計算に関して複葉機であるため、全主翼面積を使うべきか一枚分で計算すべきか意見の不一致が発生し、変更しましたが、他の値は一致しました。
二つ目は主翼構造の決定です。過去の機体の構造も参考にして、主翼の構造を決定しました。現在CAD班が決定した構造の図面を描き、次回の授業には主翼リブの切り出しが行えるようにしています。
三つ目は尾翼製作の準備です。尾翼は主翼ほど複雑ではなく、正確な切り出しが容易なまっすぐな部材のみで構成されるため、尾翼の製作をはじめにすることにしました。二人で尾翼の構造の型紙を描きました。次回の授業では部材を切り出し、並べ、接着する予定です。
私たちの機体を画面の中ではなく、物理的な存在としてみれることを楽しみにしています。

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