HEAVY-DUTY MULTIROTOR CONVERTIBLE ROTORCRAFT Russian patent published in 2014 - IPC B64C37/00 B64C27/22 

FIELD: aircraft engineering.

SUBSTANCE: proposed rotorcraft is composed of high monoplane with screws arranged on rotary circular channels at outer wing. Fuselage incorporates two load-bearing beams of lozenge rocker to deflect its beams in lengthwise plane and equipped with rotors at pylons at opposite rocker peaks. Rotors are engaged via transmission shafts with power plant engines mounted at wing root part. Rotorcraft has tail unit with all-moving fin, three-leg retractable landing hear, wing composed by combination of two approximate wings arranged in step. Front wheel is arranged above rear wing at negative degradation of the first one relative to second one with respect to angle of attack. Nacelle sections of front and rear wings are equipped with slat and flap. Said sections are configured so that narrow slot is located between front wing trailing edge and rear wing leading edge, equal to 2.5% of front wing chord at spacing between mid lines of profile of front and rear wings making 30% of rear wing chord. Note that rear wing features 45% of front wing area.

EFFECT: higher operating efficiency.

3 cl, 2 dwg