Patent · US Expired

Propeller blade for aircraft propulsion

US4652213A · kind A · utility

22Cited by

8References

14Claims

0Family size

Assignee

OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES · FR

Inventors

Jean-Jacques Thibert · Verrières-le-Buisson, FR
Jean-Marc Bousquet · Paris, FR

Key dates

Filing date	Apr 19, 1985
Grant date	Mar 24, 1987
Priority date	—
Expiry date	Apr 19, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S416/02
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

The external part at least of a propeller blade, having a maximum relative thickness between about 2 and 6%, has a profile whose thickness variation law along the chord comprises a first zone (I) going from the leading edge to about 8% of the length of the chord in which the curvature decreases rapidly, from a maximum value at the leading edge, followed by a second zone (II) extending between about 8% of the chord and midships in which the curvature decreases linearly. In a third zone, extending from midships to 75 to 85% of the chord, the curvature is substantially constant. A fourth zone (IV), extending from the end of the third zone (typically at 80% of the chord) to the trailing edge, comprises a curvature inversion.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.