Aerodynamic spoiler keeps massive blade pressed against windshield during driving
Overcoming Engineering Obstacles
The Tesla Cybertruck features the world's largest windshield wiper blade ever put into production. This created significant engineering challenges related to aerodynamics and component movement, according to Tesla executives interviewed on Jay Leno's Garage.
Custom Spoiler Prevents Flapping
To prevent the giant wiper blade from flapping in the wind while driving at high speeds, Tesla's engineering team designed a custom spoiler into the wiper arm. This spoiler catches the air flowing over the wiper and pushes the component flush against the windshield.
Without this innovation, the wiper would be prone to flopping around instead of maintaining full contact with the glass.
Fine-Tuned Angles and Timing
The Cybertruck's unique windshield shape also posed problems. Engineers had to carefully calculate precise wiper angles and timing to ensure water streams off to the sides during operation.
"That alone is most companies' definition of innovation, but it was just one small part we had to get done," remarked Moravy.
Powerful Motor Prevents Lag
Moving such an enormous wiper requires serious torque. The custom motor packs "600 to 800 watts" of power, giving it enough speed and strength to clear water without lag.
The wiper design even affected styling. Franz von Holzhausen, Tesla's Head of Design, wanted a smaller blade at first. But the larger size proved necessary to keep cameras unobstructed.
“It was an aero challenge. It was a motor challenge. It was a design challenge,” Moravy told Leno about the wiper.