Refer to figure.
A significant number of helicopters, especially those designed for IMC, are equipped with electrically driven windscreen wipers.

Most have two speeds, "Low" and "High".

NOTE:

• Due to the shape of helicopter windshields and the requirement to park the blades out of the pilot's view when not in use, the swept area can often be relatively small .
• Many wiper systems seem relatively low-tech and inefficient, considering how much the helicopter costs.