Do Airliner Airplanes Have Horns(Like Vehicles) And If So? Do They Ever Need To Use Them While In Flight?

Actually while everyone is laughing im a ramp agent for United and to inform you many commercial aircrafts do have a horn or a siren. These horns are only useful while the plane is on the ramp or taxing in or out. A pilot will usually use his horn to single ramp personel for special requests or to get attention of unaware personel that may be in a aircraft's way.

Do Airliner Airplanes Have Horns(Like Vehicles) And If So? Do They Ever Need To Use Them While In Flight?
No... First of all, if they did, they wouldnt do them any good, because planes fly with so much momentum that it would be impossible to safely change direction fast enough to avoid a collision... Instead, a plane's route is guided by GPS systems so it doesnt run into another plane... This is why the use of cellphones and other electronic devices are not allowed on a plane while in the air because the frequency of the device might match the frequency of the plane's GPS receiver and alter the route information... this is like flying blind (which can be very dangerous)...
Reply:At flying altitude, assuming -50°C, the speed of sound is about 300m/s (1080km/h or 670mph). Planes cruise at about 900km/h (250m/s or 560mph). Let's say visibility is really good, 100km, and the pilot sees an object in his way, 100km off. So, the plane honks. By the time the sound has traveled those 100km, the plane has traveled 83km and only has 17km to go before it hits the object. The plane will cover this distance in just over a minute, which means whoever is in charge of that mysterious object has only 70 seconds to react and avert danger - which means that our pilot would have done better to use the 6.6 minutes it takes him to cover those 100km to try his own evasive maneuvers.





On the ground, I suppose a horn could be of use to alert airport traffic.





But whether in the air or on the ground, you have to build an awfully loud horn to be louder than the plane itself.





I suppose that's why they use air traffic controllers and radio signals instead.
Reply:You cannot be that dumb
Reply:The sky is a little different from the ground. First, there is more available sky than ground. I very much doubt that there are as many as a million airplanes in the entire world, today, but there are millions and millions of cars. Moreover, airplanes can travel only in one direction (straight ahead). You cannot hit the brakes or back up while you are in the sky, because that would make the plane fall to the ground and everyone would die. It is very bad if everyone dies.





Even turning takes a while and LOTS of space. Most importantly, big jets fly very close to the speed of sound (jets usually travel at 600 mph and the speed of sound is around 770 mph). If they did honk, the other plane would not have time to hear the sound. Also, sound is very easily dispersed in the sky because there is a great deal of space and very little air.





Airplanes have radar and they follow a flight plan. Airports have radar too. If they see that two planes are likely to crash into each other in mid-air they will alert both pilots.





Finally, for an airplane to make a sound big enough to be heard above the sound of all the engines of two airplanes (or more) over a distance of 10 miles or more, the sound would be so loud and widespread that it would probably kill thousands of birds and shatter thousands of windows.





And that is why airplanes do not have horns, like vehicles and, if they did, would never, ever use them -- in flight or on the ground.
Reply:You have got to be kiddin !!!!!
Reply:Sure, they have AIR horns,lol
Reply:yes-they use them to shoo the birds away--duh



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