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Union government approves setting up of 13 greenfield airports

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New Delhi: The central government on Wednesday announced that it has granted ‘in-principle’ approval for setting up 13 greenfield airports across the country.

Minister of State for Civil Aviation Mahesh Sharma, said in a written reply to a question in the Rajya Sabha that the government has granted ‘in-principle’ approval to 13 projects.

The government has granted ‘in-principle’ approval to 13 projects: Mopa in Goa, Navi Mumbai, Sindhudurg and Shirdi in Maharashtra, Bijapur, Gulbarga, Hassan and Shimoga in Karnataka, Kannur in Kerala, Debra in Gwalior, Pakyong in Sikkim, Kushinagar in Uttar Pradesh and Karaikal in Pucherry,

While talking about the establishment of a greenfield airport near Bhiwadi in Alwar district of Rajasthan, Sharma said: “Government has granted site clearance to Delhi-Mumbai Industrial Corridor (DMIC) for setting up of a greenfield airport near Bhiwadi.

The Minister further informed the upper house of parliament that a view on setting up a greenfield airport at Jewar in Uttar Pradesh will be taken after receiving a completely updated proposal from the state government.

Government of Uttar Pradesh is responsible for further progress in the project as the necessary action for approval from various departments, project development, including financing of the airport project has to be obtained by the respective airport promoter,

However, the minister added that ‘in-principle’ approval has been granted to the Uttar Pradesh government for setting up a greenfield airport at Kushinagar.

(Inputs from IANS)

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NASA’s Noise-Reduction Tech to Make Quieter Airports a Reality

The Landing Gear Noise Reduction technology element addressed airframe noise caused by airflow moving past the landing gear on approach

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NASA image.
Just 11 years after Eisenhower authorized NASA, American astronaut Neil Armstrong walked on the moon. Pixabay

Aiming to reduce aircraft noise for communities that live near airports, NASA has successfully tested new noise reduction technologies on a series of Acoustic Research Measurement (ARM) flight, and managed to cut airframe noise during landing by more than 70 per cent.

The ARM flights, which concluded in May, at NASA’s Armstrong Flight Research Center in California, tested technology to address airframe noise, or noise that is produced by non-propulsive parts of the aircraft, during landing.

NASA successfully combined several technologies including Landing Gear Noise Reduction, landing gear cavity treatments, and the Adaptive Compliant Trailing Edge flexible wing flap, on various airframe components of a Gulfstream III research aircraft to achieve a greater than 70 per cent reduction in airframe noise.

“This airframe noise reduction produced by NASA technology is definitely momentous, and the best part is that it directly benefits the public,” ARM Project Manager Kevin Weinert, said in a statement.

“We are very confident that with the tested technologies we can substantially reduce total aircraft noise, and that could really make a lot of flights much quieter,” added Mehdi Khorrami, an aerospace scientist at NASA’s Langley Research Center in Virginia.

The Gulfstream III research aircraft flew at an altitude of 350 feet, over an 185-sensor microphone array deployed on the Rogers Dry Lake at Edwards Air Force Base in California.

NASA jet
Representational image. (IANS)

The Landing Gear Noise Reduction technology element addressed airframe noise caused by airflow moving past the landing gear on approach.

Another area of focus was landing gear cavities, also a known cause of airframe noise. These are the regions where the landing gear deploys from the main body of an aircraft, typically leaving a large cavity where airflow can get pulled in, creating noise.

NASA applied two concepts to these sections, including a series of chevrons placed near the front of the cavity with a sound-absorbing foam at the trailing wall, as well as a net that stretched across the opening of the main landing gear cavity.

This altered the airflow and reduced the noise resulting from the interactions between the air, the cavity walls, and its edges, the report said.

Also Read: NASA Seeks Partnership With US Industry to Develop First Gateway Element

To reduce wing flap noise, NASA used an experimental, flexible flap, which investigated the potential for flexible, seamless flaps to increase aerodynamic efficiency.

“While there are obvious potential economic gains for the industry, this benefits the people who live near major airports, and have to deal with the noise of aircraft coming in to land. This could greatly reduce the noise impact on these communities,” Weinert said. (IANS)

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