u/Chef-2

Is it possible to build a high quality square/rectangular tube by roll wrapping over a mandrel?

I've made plenty of round tubes with prepreg + shrink tape, but I'm not sure how you'd get even pressure distribution around a square tube. My attempts so far with vacuum bagging haven't worked well; it usually comes out uneven or wrinkled.

Are non-round tubes always made with split molds in the factory?