A flight test with a simplified HLFC system on the vertical tail plane of an A320 aircraft was performed in April/May 2018. The aerodynamic and system design is discussed and first results of the flight tests are presented. Subscripts: q c = Subscript 'c' denotes a quantity in a suction chamber q d = Subscript 'd' denotes a quantity in the plenum or duct q s = Subscript 's' denotes a quantity on the outer side of the microperforation q 0 = Subscript '0' denotes a reference quantity q ∞ = Subscript '∞' denotes a quantity in the oncoming freestream

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