| 摘要 |
FIELD: aircraft manufacture; manufacture of load-bearing structural members. SUBSTANCE: one of cross-sections of spar has boundary line of section; part of this line is made in form of fragment or combination of fragments of oblique taper section of right circular cone. EFFECT: improved strength characteristics (rigidity) during operation under cyclic flexure; enhanced efficiency of fixation between body and adjoining part. 16 cl, 24 dwg |
