why do airplanes have windshield wipers?

Answer 1

It's like a metronome for the Pilots.

Answer 2

I'm guessing you're wondering because most airplanes fly above the clouds? My guess is that the windshield wipers are there to remove rain from the windsheild when the airplane is on the ground.

Answer 3

In case of precipitation...? What else would they be for...disciplining the problem passengers?

Although most of the time commercial airliners are flying above the clouds, during takeoff and landing they are obviously not above the clouds. So, in case it is precipitating, they need to get the rain/snow/whatever that is impairing the pilot's view off of the windshield, hence: The Amazing Magical Fantastical Windshield Wipers!

Answer 4

To wipe the rain off the windshield. A modern jet aircraft will fly well above the rainclouds at 30,000 feet, but when it is taxiing or landing on the runway it wery well might encounter rain. Good to have wipers then. Don't want to run over the baggage handlers. Might wreck the Samsonite.

Answer 5

To clear the rain off of the windshield?

Answer 6

In the extreme event that somehow the regurgitated food of some pshycho alien enters the atmosphere and lands on the windshield.

Answer 7

To help pilots see through rain and snow, like postmen.
Not all planes have these devices. Some have their windshields upon a tither.

Answer 8

So the pilot doesn't have to get out to clean the windshield!

Answer 9

to clear the water off the windshield

Answer 10

when they fly through the clouds moisture forms on the windshield