why do most hatchbacks have a rear wiper but coupes and sedans don’t

Question

The angle of the glass on hatch backs varies from straight up and down to almost horizontal. They almost all have a rear wiper.

sedans and coupes can have similar glass angles, yet don’t have rear wipers.

why?

In: Engineering

Answer 1

I dont think it’s the airflow thing clearing sedan glass. Cars in the 80s would have nearly vertical rear glass (and trucks to this day) and they don’t have wipers.

It’s more about the dirt that accumulates on the rear of a vehicle. On a sedan or truck, the trunk or bed act almost like a rear fender on a bike. You may get dirt on the bumper, but not way up on the window.

In a hatchback, the whole back of the car, window included, get filthy. The wiper isn’t really to clear water, it’s to clean dirt.