Rotor blade, especially for a rotary wing aircraft

US4592701A · kind A · utility

Assignee

• Messerschmitt-Boelkow-Blohm Gesellschaft mit beschraenkter Haftung · DE

Inventors

• Michael Hahn · San Francisco, US
• Otmar Friedberger · Neubiberg, DE
• Gerhard Singer · Munich, DE

Key dates

• Filing date: Dec 26, 1984
• Grant date: Jun 3, 1986
• Expiry date: Dec 26, 2004

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64C27/33
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A rotor blade, for example for a rotary wing aircraft, has a wing section d a root section interconnected by a neck section surrounded by a blade angle adjustment sleeve which is stiff against torque moments for transmitting blade angle adjustment movements through the sleeve to the wing section. The trailing edge of the sleeve is provided with a gap which extends, at least partially, alongside the rear edge of the neck section for visually inspecting the neck section inside the sleeve even when the root section is connected to a rotor hub. A reflecting mirror may be used for inspecting all sides of the neck section through the gap.