In time, Wilbur conceived an elegant cable-and-pulley mechanism that twisted a flexible fabric wing across its span so that one wingtip could generate greater lift and the other less.

• 最后，魏尔柏设计出精巧的缆索及滑轮机构，用以扭转可弯折的布料机翼，让两边翼尖产生大小不等的升力。