SYSTEMS OF ROTOR SPINNERS FOR SYSTEM OF COAXIAL CONTRA-PROPS Russian patent published in 2010 - IPC B64C11/48 

FIELD: transport.

SUBSTANCE: invention relates to system of spinners, particularly to integrated spinner. In compliance with the first version, upper hub spinner, lower hub spinner and shaft spinner between the former and the latter. Shaft spinner defines aerodynamic profile has features shaped central section to reduce drag in system of axial rotors. Upper hub spinner and lower hub spinner can revolve about said shaft spinner. In compliance with second version, proposed system comprises shaft spinner defining shaft spinner chord between its front and rear edges. Shaft spinner defines ratio (c/D) between shaft spinner chord and diametre of hub spinners in the range of 0.9 D to 1.25 D. In compliance with third version, system of coaxial rotors comprises system of top rotor, top hub spinner that partially surrounds a part of top rotor hub, system of lower rotor comprising lower rotor hub, lower hub spinner that supports partially a part of lower rotor hub, and shaft spinner between top hub spinner and lower hub spinner. Shaft spinner features vertical axis of pitch, mainly, parallel to aforesaid axis of rotation.

EFFECT: reduced drag.

22 cl, 18 dwg