How would you feel if you are boarding a plane, the plane has taken off and suddenly you hear the sound of dogs barking? Will definitely be surprised. Will feel scared too. Even the apprehension of any untoward incident will start troubling you. We are not scaring you. Just telling that there are thousands of such aircraft in the world, from which such sounds come. If you have ever flown in Airbus A320, then you too must have felt it. There is a unique sound of dog barking before takeoff and after landing. Let’s know what is the reason for this?
The Airbus A320 is one of the world’s most popular narrow-body jets. Till now more than 5000 aircraft are flying and the company has received orders for more than 8000 aircraft. In India too, many airlines including Indigo, Air India have tied up with the French company for Airbus A320 aircraft. Because it is equipped with many state-of-the-art facilities. It is considered quite safe. Till now, the matter of its accident has not come to the fore anywhere in the world. Despite being so modern, it still makes a sound like barking of dogs, which surprises people.
when strength is needed
Actually, this noise in the aircraft comes from PTU ie Power Transfer Unit. The PTU transfers power from one hydraulic unit to another, thereby powering the aircraft. There are a total of three hydraulic systems in the Airbus A320. Two run the engine while the third is used for backup. It provides hydraulic power to the entire system. As soon as an aircraft has to takeoff or landing, the hydraulic system only moves it upwards or downwards. At that time a lot of strength is needed. Because landing gear, nose wheel steering, braking system on the ground and flaps all work together so that the speed is controlled.
Too much noise during takeoff and landing
The barking sound is most commonly heard when an aircraft is preparing to take off or when an engine shuts down after landing. This is because only one hydraulic system is working at that time. There is more pressure on him. Some passengers have problems with this but it is a very valuable system. This ensures that the pilots have full control of the aircraft at all times. According to Airbus, the A320 hydraulic system is made up of three independent circuits – green, yellow and blue. It is fitted to ensure control of the aircraft even when one of the systems is inoperative. Passengers may get scared but there is nothing to worry about. The PTU only engages when the hydraulic pressure of the A320 or A330 drops below a pre-set level. This happens only when the time of takeoff and landing comes.
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FIRST PUBLISHED : March 14, 2023, 07:45 IST