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A blade shape distortion develops during the manufacturing process. The distortion is referred to as difference between the target blade shape as per design and the shape under operational temperatures. This initial distortion varies under operational temperatures due to different thermal coefficients of expansion of the various blade materials. This resulting distortion due to manufacture and operational temperatures affects the twist angle, the cross-sectional shape and the sweep of thedoi:10.5281/zenodo.3803079 fatcat:r5ox3azd3feifpbsclixkincuq