Rotary wing aircraft with a tail shroud

US9475578B2 · kind B2 · utility

Assignee

• AIRBUS HELICOPTERS DEUTSCHLAND GMBH · DE

Inventors

• Sebastian Mores · Munich, DE
• Alessandro D'ALASCIO · Haar, DE
• Rainer Grodau · Munich, DE
• Qinyin Zhang · Munich, DE
• Christian Wehle · Augsburg, DE
• Stefan Probst · Buchdorf, DE

Key dates

• Filing date: Dec 8, 2014
• Grant date: Oct 25, 2016
• Expiry date: Apr 18, 2036

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64C2027/8281
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A rotary wing aircraft with a tail rotor in a rotor duct of a shroud. A bumper projects from a lower transition region of said shroud, said lower transition region having a left hand and a right hand lower transition edge between respectively the left hand and the right hand annular surface around the rotor duct and the bumper. Upper leading edges of a vertical fin and of said shroud are provided with left hand and right hand trailing edges. A projection of the upper transition edge to an upright longitudinal plane is defined by a spline curve through points Pi (i=1 . . . 5) and a projection of the lower transition edge to the plane is defined by a spline curve through points Pi (i=6 . . . 10) defined by their respective coordinates (xi, zi) relative to a centre of the shrouded tail rotor.