IndiGo Airbus A321NX Takeoff (Loud LEAP1A Growl On Climb)

This is the view from seat 10F onboard an Airbus A321NX flown by IndiGo. Notice how the thrust changes affect the engine noise as soon as the thrust transitions to climb. The loud LEAP1A growl which is unique to the A321 series becomes noticeable soon after. It becomes apparent at 1:37
Departure Airport: Mumbai
Seat: 10F
Aircraft: A321NX
Enjoy the distinct LEAP1A buzzsaw for 3 minutes!

[@GABRIEL-dz9mh]

Leap engines sound like mini GE90s. Partly developed by GE so makes sense

[@taxiviaalfa]

Sounds slightly quieter than the LEAP 1B

[@flyingowl]

Yeahp indeed

[@ruchirkatyal9992]

NEO engines are sounding like CEOs once Juhu Beach comes

[@flyingowl]

That’s the beauty of the LEAP1A

[@Mohamed320neo]

Why did thrust increase during climb and not during takeoff? I knew that take off phase rquires the max thrust

[@flyingowl]

Not necessary, many takeoffs these days are derated, also denoted by FLEX thrust on the Airbuses.
Initial climb thrust is lower or equal to the takeoff thrust setting, but at higher altitudes you need a thrust increase to maintain climb and compensate for air parameter changes.
Hence the climb thrust will slowly increase to reach a max value at around the Mach transition altitude which is roughly from 28000 - 31000 ft, then gradually decrease a bit.

[@amirteshwaranmuthusamy8703]

Seat no ?

[@ruchirkatyal9992]

Where are you going in this flight?

[@flyingowl]

Delhi

[@ruchirkatyal9992]

Which was your boarding terminal and landing terminal??

[@flyingowl]

T2 at both the airports IIRC

[@ruchirkatyal9992]

What is the plane registration?

[@flyingowl]

It was a VT-IL? series aircraft, don’t remember the exact reg

[@ruchirkatyal9992]

@@flyingowl it means you don't know the last letter