FIELD: aviation. SUBSTANCE: bladed subunit has blade made in form of aerodynamic fairing with inner flexible beam and torsion tube; flexible beam is provided with fastenings for securing its inner end to main-rotor hub. Linear load is preliminarily imparted to flexible beam over length from inner end of beam as far as its outer end; strengthening member is made in form of spar. main-rotor blade, torsion tube and spar are connected with outer end of flexible beam. Torsion tube and spar contain solid tubular composite structure. EFFECT: obtaining optimal operational characteristics at minimum total mass of flying vehicle. 9 cl, 32 dwg
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