Claims
- 1. A laminated wooden rotor blade having a flatbottomed air foil, comprising
- a two-sided tapered laminate composed of compression bonded parallel layers of wood having a convex side in a predetermined contour to which all of the layers of wood are approximately parallel over the entire length of the blade and a flat twisted side, the surface of which at any point along the length of the blade is rectilinear in cross section but of varying orientation along the length of the blade according to a predetermined twist schedule, said flat side cutting across the laminae of said blade to reveal the parallel edges thereof.
- 2. The blade of the foregoing claim 1, wherein said convex surface is formed by a single continuous outer lamina.
- 3. The blade of claim 1, wherein said laminae are predominantly wood veneer.
- 4. The blade of claim 1, wherein said laminae are predominantly birch veneer.
- 5. The blade of claim 1, wherein said laminae are bonded together by melamine urea.
- 6. The blade of claim 1, wherein said laminae are bonded together by applying adhesive to the lamina and heating the laminate under compression.
- 7. The blade of claim 1, wherein said adhesive is melamine urea.
- 8. The blade of claim 7, wherein said heating is accomplished by radio frequency heating.
Parent Case Info
p This is a division of application Ser. No. 379,631 fled May 19, 1982, now U.S. Pat. No. 4,465,537 issued Aug. 14, 1984, assigned to the assignee of the present application.
Government Interests
The Government has rights in this invention pursuant to Contract No. DE-AC04-76DP03533 awarded by the U.S. Department of Energy.
US Referenced Citations (7)
Foreign Referenced Citations (3)
Number |
Date |
Country |
859801 |
Dec 1940 |
FRX |
577813 |
Jul 1958 |
ITX |
158964 |
Dec 1980 |
JPX |
Non-Patent Literature Citations (2)
Entry |
Wind Industry News Digest, p. 6, Feb. 1982 (along with photocopy of sample product). |
Faddoul, "Test Evaluation of a Laminated Wood Wind Turbine Blade Concept", May 1981, DOE/NASA/20320-30 NASA TM-81719. |
Divisions (1)
|
Number |
Date |
Country |
Parent |
379631 |
May 1982 |
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