FLAPPING-WING AIRCRAFT Russian patent published in 2008 - IPC B64C33/00 

FIELD: flying vehicles equipped with flapping wings set in motion by man power.

SUBSTANCE: proposed flapping-wing aircraft has fuselage (5), flapping wings (1), flapping wing control mechanism, tail unit, control members, front wheels (20) and rear wheels. Lower and upper surfaces of fuselage are formed by two parabolas Y₁=K₁X^1/2 and Y₂=2R₀+K₂X^1/2 which are tangential relative to circle at radius R³ R₀ whose center is located at distance 1³2/3L, where L is projection of fuselage length on coordinate X; coefficients K₁ and K₂ are calculated by the following formulae K₁=Y_1A/X^1/2 _1A and K₂=-2R₀+Y_2B/X^1/2 _2B, where points A and B are points of tangency of parabolas Y₁ and Y₂ of circle at radius R; point A is found by intersection of perpendicular erected from point 1³2/3L, where L is projection of fuselage length on coordinate X at line of angle of attack α³7° and point B is opposite point of diameter laid off point A on erected perpendicular.

EFFECT: increased lift force of flapping wing.

2 cl, 7 dwg