Abstract: A flapping wire aircraft capable of being operated by manpower comprising double wings acting in a countermovement is provided with a toggle lever system on each side for separate actuating the right-hand and left-hand wings respectively to improve steering possibilities; said toggle lever systems permitting increased wing flapping speeds. The wings are at least partially elastic and of a compact shape; according to a preferred embodiment circular-ellipticaly, rearward-outwardly extending wing spars are in an approximately parallel arrangement, the first of which following the front/side edge of the wing; these on substantially in flight direction arranged bearing spars attached wing spars guide sharing air portions to the rear, resulting in enhanced propulsion.