AERODYNAMIC PROPELLER Russian patent published in 1998 - IPC

FIELD: devices converting energy of air flow into mechanical energy of rotation or energy of rotation for creation of air flow. SUBSTANCE: proposed aerodynamic propeller is provided with blades inclined to propeller axis at angle no less than 60 deg. Blades have bow-shaped ribs on both sides. Height of ribs is no more than 6% of blade profile chord. Height of ribs located on side of blades where pressure is reduced is equal to 40-60% of height of ribs located opposite side. Position of ribs on blade is determined by angle between direction of leading edge of blade and chord of rib which ranges from 75 to 90 deg. EFFECT: enhanced efficiency. 2 cl, 8 dwg