>Airplanes rely on redundancy, which makes manuacturing more expensive but. Cars on the other hand try not to break in the first place, which is ensured through

>Airplanes rely on redundancy, which makes manuacturing more expensive but. Cars on the other hand try not to break in the first place, which is ensured through exhaustive testing and monitoring of the production chain. I don't agree with this. You're missing a variable: safety factor. Cars try to minimize safety factor to save money and weight, airplanes often have more regulations to prevent this. Cars definitely break more often then airplanes. Also, keep in mind that aircraft can rely on preventative maintenance by trained professionals. Cars really can't, meaning they have to simplify their components and assembly a lot.