Rotors, propellers or the like, having a sand fish skin surface profile, penguin plumage surface profile.

摘要

The invention relates to rotors, propellers or the like, on the outer surface, part of the surface or the whole surface of a sandy fish surface profile and / or a penguin plumage surface profile to reduce air resistance or water resistance and / or increase energy efficiency and noise reduction and / or soil repellence and / or arranged to protect against flying particles.