N1 Power on takeoffs

Hello good day! I have a terrible doubt ā€¦ I watch YouTube videos of takeoffs, overlooking the engine. I want to know what power N1 pilots put on. If it is N1 (%) 80, 85, 90, 95, 97, 100% or more. Can you help me if you know it right?šŸ™šŸ»šŸ™šŸ»šŸ™šŸ»šŸ™šŸ»šŸ™šŸ»

If anyone has a little time to watch the part of the videos that has the takeoff, and can inform me the power N1, I will be very very thankful!

Because knowing these, I can know the others on their own, just by the noise of the engine.šŸ¤“

  1. British Airways Airbus A350-1000 G-XWBA Take Off from Madrid | BA457 | MAD-LHR - YouTube (British Airways Airbus 35K MAD-LHR)

  2. [Flight Report] QATAR AIRWAYS | Doha āœˆ Paris | Airbus A350-1000 | Qsuite - YouTube (Qatar Airways Airbus 35K DOH-CDG)

  3. 777-300ER takeoff from SYD. - YouTube (American Boeing 77W SYD-LAX)

  4. American Airlines B777 Takeoff London Heathrow - YouTube (American Airlines 77W LHR-LAX)

  5. QATAR AIRWAYS 777-300ER Business Class / QSuite [Frankfurt - Doha] #qatar - YouTube (Qatar Airways Boeing 77W, FRA-DOH)

  6. Air Canada Boeing 777-300ER FRA-YYZ Fabulous Take-Off and Landing from window seat by engine - YouTube (Air Canada 77W, FRA-YYZ)


Generally speaking the takeoff thrust needed is calculated using either the personal EFB or the onboard EFB (EFB= Electronic Flight Bag).

(For sure on an Airbus, but not sure about the other types:) The calculation results in either a flex temperature which is entered into the FMS or the information that TOGA thrust is required.

Based on the flex temperature the engine setting when takeoff thrust is applied is set (pretty sure with this:) by the FMS.


I personally use TOPCAT - basically like an online EFB - not 100% accurate to the Infinite Flight Models but very close! However it only supports a few aircraft and only a few that are in IF.


I mean, Iā€™m not that super yet to know the N1 just by hearing the engine sound. But usually company and airport will recommend the pilot to use decrease throttle on takeoff. However, sometimes the pilot will need full power on takeoff, that depends. The N1 on takeoff will based on the calculations of Thrust Limit, flex temp. and all those good staff.

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I try and aim for 96-98% N1 (80-85% thrust)


Hey, I really want to know the power N1 percentage of these videos. šŸ˜¢

Unless you ask someone who was in the cockpit at that specific time, you will never find out the exact number from the videos.

As stated above, the percentage is carefully calculated based on weather, weight, corporate policies, and other variables. Your % on one flight may not be the same on another. You are better off learning what goes into making that calculation.


Okay. Understand!

So. Can you tell me how to calculate or what to use to calculate?

We are down to repeating. Has been answered multiple times.