Induced Drag of wings and Calibration

1.建立了新的平衡。利用该天平进行了前掠翼和后掠翼的实验研究.天平的校准是利用日本唯一的多分量校准台NAL进行的。利用NAL标定结果计算的诱导阻力随后掠角的增大而增大.利用天平制造商的校准结果计算的诱导阻力随着后掠角的增大而减小.天平的载荷在NAL校准台的下限范围内，并且该台的校准协议自该台最近开始运行以来尚未建立，这意味着该台的校准结果可能不是很准确。宇空实验室正在对天平进行重新校准，实验的最终结果将在重新校准后公布。

1. New balance was made. Experiments on forward/aft-swept wings were conducted using this balance.2. The balance was calibrated by means of multi-component calibration stand of NAL which is the only one test stand of this kind in Japan. Induced drag, which is calculated by use of the calibration results of NAL,increases as the sweptback angle increases.3. Induced drag, which is calculated by use of the calibration results of the manufacturer of the balance, decreases as the sweptback angle increases.4. The facts, that the load of this balance is within the lower limit range of the NAL's calibration stand and the calibration protocol of this stand has not been established since this stand started to run recently, means that the calibration results of the stand might not be very acurate.5. The re-calibation of the balance is again going on at NAL.The final results of this experiments will be published after the re-calibration.