Slow motion video your bare shaft. Note the rotation of the arrow coming off the string and out of the riser. I would mirror that with my fletchings.
Yeah ask a pilot! Because we know how smart they are. LMFAO the only people with less commonsense are engineers. But don't worry a Pilot or Engineer will be along shortly to let us know how smart they are.
Fletchings will increase the rotation of the arrow which helps stabilize the arrows flight. It does also cause drag and increases surface area which increases wind drift. But the trade offs are worth it.
