With aircraft, there's various certifications within weight and/or speed categories, but also experimentals, where usually some calculations and an inspector ar

With aircraft, there's various certifications within weight and/or speed categories, but also experimentals, where usually some calculations and an inspector are needed. The inspector is not a bureaucrat, but someone with substance expertise, usually someone who has built aircraft themselves. That said, there are a lot of odd regulations in aircraft in aöl countries...