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Unidirectional tape is more expensive than aluminum and more difficult to lay up than a woven prepreg .
Unlike some of the prepreg materials ordinarily used in composite processes, what they're using is a material that's like a fabric at room temperature.
Even construction is now mostly metal, although the airframe retains some prepreg carbon-fiber materials.
The outer panel is based on a unidirectional prepreg tape.
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