Do airplanes have windscreen wipers? explained by Captain Joe

Dear followers and aviation enthusiats. In this video I´ll be answering a great question which was sent in by one of my Instagram followers named KayDoc:"Dear Capitan Joe, do airplanes have windscreen wipers such as cars have them?" Fantastic question! Okay let´s imagine you´re sitting in your car, and as you get onto the motorway it starts pouring with rain. One little move with your finger and you´re windscreen wipers comes on, and you have a clear sight onto the road again. But how about airplanes, how do they get rid of the rain ?  On ground:   Put yourself into your passenger seat and imagine that we are slowly taxing towards the runway and it´s raining heavily. A passenger jet taxi´s (straight) with a speed at about 20 - 35 mph ( 30-60km/h ), which isn´t fast enough for the airstream to clear the windshields from raindrops. The visibility reduces dramatically which can be dangerous on airport aprons. So with one little hand movement, like in your car, every pilot can switch on his windscreen wiper. There is one wiper on each side which can be turned on separately and has two speed settings, slow and fast. During a rainy take-off roll we keep the wipers switched on, cause as you gain speed a lot of the water from the nose cone runs over the windshields and the visibility is reduced even more, so you have the option to increase the wiper speed . Similar as you go along the motorway at 60mph, you may use wiper speed „1“, but if you accelerate to 100mph, at the same amount of rain, you´re gonna have to adjust your wiper speed. Okay let´s imagine we´re in flight. During enroute cruise the wipers are inoperative. They are aerodynamically and mechanically limited to the speed of the aircraft so that the switches are inhibited. The limit varys between aircraft manufactures. The limiting speed for example on an Airbus A320 is 230kts (260mph/). On final approch ( approx 20 miles from the runway ) you fly at speeds of 260 mph, which is fast enough to clear the windshields from rain. But three miles prior to landing you will have reduced the speed down to 140kts and in heavy rain the wipers are absolutely essential to get clearly visibility onto the runway. In the event that one wiper is inoperative, may only the pilot with the functional wiper fly the aircraft. In the event that both wipers are inoperative, which is very unlikely, the aircraft is limited such as it may only take-off and land in visual metrological conditions and it´s capability to land within certain approach minimas (height and visibility) is reduced and limited.  Single engine airplanes don´t necessarily need wipers cause the propeller airstream is strong enough to clear the windshield of precipitation and most of them are only certified to fly in visual metrological conditions anyways. So the next time you´re sitting in an aeroplane and it´s pouring with rain , imagine the pilots doing this move:) I hope this short video gave you glance into the handling with windscreen wipers on airplanes! I hope you enjoyed this video. Make sure to subscribe my channel so you don´t miss future videos like these. All the best, your captain Joe Info: Many aircraft manufactors also installed a switch or a button which allows you to spray "rain repellant" onto the windscreen in heavy rain, smiliar to your wiper washer. Unfortunately this liquid was banned in many countries due to it´s highly chemical substances so that on most airplanes this switch is set inoperative. If you have a video of how to use the rain repellant, I would be very happy to see it.

Comments

Sawaid Instagram: Hey Captain Joe! Can you make video on flaps and its uses?

Akshay Lavande: Hey joe. How are you ? I like your videos so much. I just want to know that how do you set direction of plane and runway in one direction while landing ? Can you please explaine ?

Maksis Auziņš: Joe, could you explain how the manteinance panels and circut breakers work?

C4M0 Boss: Doesn't a captain drive a boat

anonymoose: What are some of the worst situations in the passenger section that you've experienced?

Episch Erds: Do fighter jets have wipers to?

Mikhail Tukhachevsky: Its Paul Rudd in a pilots uniform!!

robot 1435: Question - do the windows in the cockpit open/roll down?

athatv phansikar: Dear captain joe could you explain CAT2 and CAT3 landings

Tamaz Kekenadze: What is mda mdh mh ma ?

Jesse Beeson: Hmm... When he mentioned that piston singles don't need them because of the air coming off the propeller and that those pilots are typically confined to a VFR certification, that leads me to wonder about a piston twin like a Baron or a Twin Comanche that also don't have windshield wipers. Is the air coming off the two props enough even though they're not in front of you?

Just Remix RE: Mr: Captain Joe, A Pilot how can understand the air line root during flying time

Francisco Salazar: It doesn't cleans the entire winshield, right? any particular reason?

UR HIRED HR: The wipers look like junk and don't even cover the entire windscreen!

Juliana Wielz: can you explain about the planes wingtip

Lewis Barzola: i love how he smiles and giggles every rimw he looks at the camera

heffo and juff: I'm a little curious Captain, you have three applets on your shoulders. If you were to have four, you would be a Captain. Could you please clear up this mystery for me? Thanks and I really love your videos!

Chris Foote: Hey Joe, I read that there is half as much air density at 18000ft. I'm sure this isn't linear, there is probably more than 25% at 9000ft. I'll curious about the percentage of air at different altitudes and just how much more a jet is at cruising altitude than close to sea level. I'm a student glider pilot and I'm not terribly interested in flying something with a power plant but I am interested in the atmosphere.

Johan Bakke Musik: Hi Joe! I don't know if you already made a video explaining turbulence, but I really like to see it!

robert hingston: Interesting

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