ad is arranged between these arms the mentioned branching area of the second and third arms 102 ab 102 ac from the first arm 102 aa is designated in fig1 with the reference symbol 102 ae the electric motors not shown and propellers 2 are arranged on the free ends of the second and third arms 102 ab 102 ac and also in the branching area 102 ae the mentioned first to third arms 102 aa c of the beams 102 a f are arranged essentially in a common plane while the free end of the first arm 102 aa is angled off according to the representation in fig1 a and 13 b by approximately 90 u00b0 relative to this plane toward the bottom in order to connect the beams 102 a f to the rest of the aircraft 102 for reasons of clarity this is shown explicitly in fig1 a 13 b in turn only for select beams as can be seen in fig1 a and fig1 b the mentioned bends of the first arms 102 aa have different length dimensions so that the propellers 2 of the beams 102 a 102 b the beams 102 c 102 d and the beams 102 e and 102 f are arranged staggered at different planes in the stationary hovering state of the aircraft 102 according to fig1 a fig1 b shows the aircraft 102 according to fig1 a during forward flight due to the forward inclination of the aircraft 102 essentially two parallel rotor planes are effectively produced.