So rn I’m flying from JFK to CDG with an Air France 777-200ER… I’m at an altitude of Lvl420 so autopilot is using Mach, however, I guess Mach system isn’t really working, cuz the limit (in rules) of speed, is Mach 90… still I have .95 Mach set in AP but it doesn’t really warms me or anything… Also, …

Your speed is way too high. Check out the max operating speed in link provided below. [image] Infinite Flight Fuel Burns (Estimates): XCub & TBM Added! I have spent some time going through each of the aircraft that we have available to us and brought all of the fuel burn…

Are your engines at max thrust?

I don’t really understand the full problem, but from I can gather your aircraft should not be flying at M.90 it should be flying at speeds such as M.83- M.86

At 90-95%… so it’s not at max

Max at the altitude I am is 90% (if I remember right)

What is your aircraft load? FL420 seems a bit high if you’re trying to get to that alt. early on in the flight.

Whoops… xD I meant 42000ft, that level…

FL420 is 42,000ft… Did you do a step-climb or did you climb straight to FL420?

Stepclimb… 320, 360, 380, 400, 420

Again, your speed was set too high.

Yeah I guess… still not like what I was trying to get answered with… but yeah, also my ft/m when departed was 14 (max)

Max speed, Mach limit, and a HUD technical problem

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DeerCrusher January 25, 2018, 9:56pm 3

Your speed is way too high. Check out the max operating speed in link provided below.

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Max speed, Mach limit, and a HUD technical problem

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