Claims
- 1. A gas turbine engine comprising stator vanes located between compressor stages, characterized by:
- the stator vanes including a composite shell of fibers laid-up over a core, said fibers comprising a plurality of plies of graphite fibers in a binder bonded to said core, said core comprising randomly oriented fibers selected to have an elongation velocity that exceeds the elongation velocity of said fibers in said composite shell.
- 2. A gas turbine as described in claim 1, further characterized by:
- said core comprising at least four plies of K129 in an epoxy binder; and
- said shell comprising at least eight plies of graphite fibers in an epoxy binder.
- 3. A gas turbine engine according to claim 1, further characterized by:
- said core comprising one ply of polyimide film over at least four plies of fused SiO.sub.2 in polyimide foam comprising polyimide resin filled with hollow microspheres having compressive strengths greater than a selected value.
- 4. A stator vane as described in claim 3, further characterized in that the selected value is 500 psi.
Parent Case Info
This application is a divisional of U.S. patent application Ser. No. 08/194,200 filed on Feb. 9, 1994, now U.S. Pat. No. 5,509,781.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
5439353 |
Cook et al. |
Aug 1995 |
|
5509781 |
Boszor et al. |
Apr 1996 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
194200 |
Feb 1994 |
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