Title: Rotor without flapping hinges and without lead-lag hinges

Abstract: A rotor, especially for rotary wing aircraft, is constructed without flapping hinges and without lead-lag hinges. The rotor comprises a rigid rotor head and rotor blades secured to the rotor head by flexible coupling rods, for example, made of fiber reinforced composite material. One end of each rod is secured to the rotor head. The other end of each rod is secured to the root of the respective rotor blade. The rods are so arranged that their central longitudinal axes coincide with a generatrix of two coaxial cones having a central axis. One of the cones is located with its base in the respective rotor blade while the other cone is located with its base in the rotor head. This type of structure is surprisingly simple, yet capable of transferring substantial forces between the rotor head on the one hand and the rotor blades on the other hand.

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Inventors: Derschmidt, Hans (Putzbrunn, DE, US)
Sahlstorfer, Hermann (Ottobrunn, DE, US)

Application Number: 923339
Filing Date: 1978-07-10
Publication_date: 1980-05-06
Assignee: Messerschmitt-Bolkow-Blohm GmbH (Munich, DE)
Primary Class(es): 416/134A 403/291, 416/141
Other Classes:
US Patent Ref:

3669566	Jun, 1972	Bourquardez et al.	416/134.
3695779	Oct, 1972	Kastan et al.	416/141.
3879153	Apr, 1975	Breuner	416/141.
3880551	Apr, 1975	Kisovec	416/141.
3893788	Jul, 1975	Ditlinger	416/134.
4038885	Aug, 1977	Jonda	416/134.

Other Refs: 13344461564092

Jul, 1963	FR
Mar, 1969	FR

Primary Examiner: Vrablik, John J.
Assistant Examiner:
Attorney: Fasse; W. G., Gould; D. F.