GB720600A - Improvements in hollow blades for the aerodynamic rotors of helicopters and wind motors - Google Patents
Improvements in hollow blades for the aerodynamic rotors of helicopters and wind motorsInfo
- Publication number
- GB720600A GB720600A GB283452A GB283452A GB720600A GB 720600 A GB720600 A GB 720600A GB 283452 A GB283452 A GB 283452A GB 283452 A GB283452 A GB 283452A GB 720600 A GB720600 A GB 720600A
- Authority
- GB
- United Kingdom
- Prior art keywords
- section
- blade
- pitch
- spar
- interconnected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910001234 light alloy Inorganic materials 0.000 abstract 2
- 238000005266 casting Methods 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 abstract 1
- 230000005484 gravity Effects 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000004080 punching Methods 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/32—Rotors
- B64C27/46—Blades
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Wind Motors (AREA)
Abstract
720,600. Wind-motors. DE HAVILLAND PROPELLERS, Ltd., and PERDUE, R. J. Jan. 26, 1953 [Feb. 2, 1952], No. 2834/52. Class 110 (3). [Also in Group XXXIII] Relates to a hollow, adjustable-pitch rotor blade for use in a helicopter or a suction windmill adapted to act as a centrifugal pump to draw air through a turbine driving an electric generator. In such a blade the pitch-change axis is located nearer to the leading edge than to the trailing edge and the mass of the blade is so distributed that the centre of gravity is located on or substantially on the pitch-change axis and the blade comprises upper and lower sheet members which define at least a portion of the upper and lower aerodynamic surfaces of the blade; the inside surfaces of said sheet members being interconnected by at least one spar member and having longitudinally extending stringers and the outside surfaces of said sheet members having chordwise extending ribs. The blade comprises two sections 11, 12 interconnected by a bolted flange connection 13, 14; the section 11 varying from a circular form at its root end to an aerodynamic form at its opposite end. The section 11 is internally supported at its root end by pads on four legs of a light alloy casting 17 which is pinned to a pitch-change shaft; the root end being enclosed by a casing 20. The section 11 is reinforced as at 21, 22, see also Fig. 2 (not shown). The section 12 has parallel leading and trailing edges, is of substantially uniform profile throughout its length and has a rearwardly directed outlet 23 through which air is directed by deflectors 24, 25. The skin of the section 12 is made of light alloy sheets 26, 27, 29, 30; the sheets 26, 27 being thicker than the sheets 29, 30 which are interconnected at their trailing edge 31. The section 12 is reinforced by ribs 32, 33 and has a main spar 34, 35 which divides the section into portions 35<SP>1</SP>, 36. The section 12 is also provided with a spar 38, 39, stringers 41, 42, 43, 44 and struts 45, 46, 47. The flange of the members 34, 35 are riveted to the skins of the member 12; punching pieces being interposed as necessary. The section 11 is provided with a like skin and a like reinforcement. The leading edge of the blade comprises a spar 28 of thick metal section formed by extrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB283452A GB720600A (en) | 1952-02-02 | 1952-02-02 | Improvements in hollow blades for the aerodynamic rotors of helicopters and wind motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB283452A GB720600A (en) | 1952-02-02 | 1952-02-02 | Improvements in hollow blades for the aerodynamic rotors of helicopters and wind motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB720600A true GB720600A (en) | 1954-12-22 |
Family
ID=9746820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB283452A Expired GB720600A (en) | 1952-02-02 | 1952-02-02 | Improvements in hollow blades for the aerodynamic rotors of helicopters and wind motors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB720600A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5205715A (en) * | 1990-10-13 | 1993-04-27 | Westland Helicopters, Ltd. | Helicopter rotor blades |
-
1952
- 1952-02-02 GB GB283452A patent/GB720600A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5205715A (en) * | 1990-10-13 | 1993-04-27 | Westland Helicopters, Ltd. | Helicopter rotor blades |
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