Optimised nozzle geometry

A compressed gas ejection means non-movably located on a trailing edge of a rotating wing aircraft blade, the compressed gas ejection means comprising a compressed gas passage means, the compressed gas passage means being adapted to allow a substantially constant velocity of compressed air flowing through the compressed gas ejection means across substantially the entire width of the compressed gas passage means, wherein the rotating wing aircraft comprises a compressor for producing compressed air for the compressed gas ejection means, wherein the compressed gas ejection means comprises a guide means for guiding compressed air from the compressor through a turn to the compressed gas passage means, wherein the guide means comprises a plurality of guide channels and wherein the cross-sectional areas of the plurality of guide channels are adapted to allow a substantially constant velocity of compressed air flowing through the compressed gas ejection means across substantially the entire width of the compressed gas passage means.