Why Aren't Rear Windshield Wipers Standard on US Cars?
As a car enthusiast, I've owned a station wagon and a minivan that both featured rear windshield wipers. However, from my experience, they were nearly useless, and I decided to remove them entirely. Instead, I filled and repainted the rear hatches, making them look cleaner and more modern. Both vehicles had deicer and defogger functions, and in case of overnight snow accumulation, I simply brushed it off in seconds. This led me to research why rear windshield wipers are not more common on cars, especially in the US market.
Variable Usage in Different Make and Models
When evaluating a new car, I noticed that not all models come equipped with rear windshield wipers. It seems that the inclusion of these wipers depends on the make and model of the vehicle. This leads to an interesting diversity in car design aesthetics and functionality.
The Science Behind Rear Wipers
The reason why sedans often don't require rear windshield wipers is quite simple. The rear end of a sedan typically tapers off more smoothly, allowing airflow to travel across the surface of the car much more easily and directly. In contrast, airflow is less direct and more turbulent near the rear of station wagons and hatchbacks. This airflow can help remove water from the windscreen as the car moves, eliminating the need for a rear wiper blade.
Upgrade and Variability
It's worth noting that some cars do come with rear windshield wipers, albeit as an optional upgrade. These wipers serve an important purpose, particularly in adverse weather conditions. They ensure that the driver has clear visibility even when the rear windshield becomes fogged up or covered in dirt or snow. The function of these wipers can be controlled through the wiper switch, similar to front windshield wipers.
How Rear Wipers Work on Vehicles Like the Viper
The operation of rear windshield wipers, such as those found on the Viper, can be a bit more complex. These wipers typically have an innovative mechanism that allows them to clean the rear glass effectively. When the wiper is tilted, it contacts the surface of the rear windshield and moves back and forth, ensuring a thorough clean. This feature is especially useful on vehicles where the rear glass might accumulate dirt or water, reducing visibility.
No Rear Windshields in Cars?
Interestingly, there is no such thing as a car with a rear windshield. Cars in general are designed with one or more front windshields, but the rear is typically a plain glass or plastic panel. This absence is why rear windshield wipers are not standard on most cars. However, station wagons and hatchbacks do require rear windshield wipers due to the aerodynamics and the way they deal with water and debris. In sedans, the rear windshield is designed to redirect airflow in a way that minimizes water accumulation.
Conclusion
In conclusion, the reason rear windshield wipers are not standard on all cars, especially sedans, is due to the design and aerodynamics of the vehicle. While some may find them useful, the majority of cars in the US market do not include rear wipers as they are not necessary for proper functionality. If you find yourself in adverse weather conditions where visibility is compromised, rear windshield wipers can be a great additional feature to have.