Mach speed

Hello and good afternoon dear pilots of Infinite Flight. As I’m cruising towards SMJP today, what should my Match speed be set to when cruising at an altitude of 40,000 ? I will be more than happy to receive a feedback as soon as possible. Thank you.

  • Captain Justin M.

This does depend on the aircraft type. Have a look at this topic here for some ideas:

As I think the A350 isn’t in there, that would be M0.85.

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Also a very warm welcome to the IFC, I would recommend this topic to make you familiar with the Community:

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Im currently flying a 777-300. What should the Match speed be set for that aircraft at an altitude of 40,000?

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M0.84 would be the standard cruise speed from what I read and max M0.89.

Thank you, your reply was greatly appreciated. Have a great one fellow pilot.

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No problem at all, glad I was able to help!

Thank you and same for you!

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M 0.86 is the optimal cruise speed for fuel economy.

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Flight global named M0.84 as the published speed, but you might be right.

https://www.flightglobal.com/flight-test-boeing-777-300er-fast-and-heavy/52568.article

No, for the A350. You mentioned it was missing from the list.

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Using tools such as fpltoif.com and simbrief can help in this regard.

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Oh, sorry, I misunderstood it. Nonetheless I do find M0.85 online for the A350, so I really don’t know what’s right or not.
Thanks for letting me know though!

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