в чём разница между прямым крылом(верхнее крыло) и крылом с повёрнутыми концами на зад , и верхним * V * образном и прямым .
На настоящих бипланах, для удобства посадки пилота в кабину, делали вырез в верхнем крыле (пример По-2). Если же самолет был еще меньше(прим. Pitss-2), то приходилось вместе с вырезом делать верхнее крыло стреловидным. А так никакой разницы, если не считать, что со стреловидным крылом самолет немного устойчивей. А V-образность крыла, тоже для повышения устойчивости, только уже по крену.
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