arrows and bullets are projectiles the feathers on arrows help them fly straight. rifling is also used to make the bullet go straight and increase its range this is why there are dimples on golf balls. I was under the impression that was the question maybe I read it wrong.
ORIGINAL: lnewqban
ORIGINAL: psb667
ORIGINAL: lnewqban
If dimples are so helpful aerodynamically, why are golf balls the only dimpled projectiles?
feathers and rifling came before golf.
Sorry, I don’t see how those three things are related.
IMO, feathers are hair adapted to form flying surfaces, but keeping the insulating properties by trapping air among fibers.
Riffling is not on the projectile, and its purpose is to create a gyroscopic effect that improves the trajectory of bullets.