All-fabric spar for aerodynamic components

A method for manufacturing a tubular composite structure, comprising:

• circumferentially laying up a first stack of a plurality of composite fabric layers all the way around a mandrel, wherein the layers in the first stack comprise a woven fabric comprising a first axis of orientation including at least one of an on-axis orientation and an off-axis orientation;
• laying up a second stack of composite fabric layers partially around the first stack after the first stack has been laid up around the mandrel, wherein the layers in the second stack comprise a woven fabric with a second axis of orientation including at least one of the on-axis orientation and the off-axis orientation, wherein the second axis of orientation of the second stack is different than the first axis of orientation;
• laying up additional stacks of composite fabric on top of the first and second stacks and around the mandrel, wherein the additional stacks comprise fabric having the first axis of orientation alternating with stacks having the second axis of orientation;
• and
• curing the first, second, and additional stacks of composite fabric layers to form the tubular composite structure.