Max cruise speed for planes

What are the max cruise speeds for planes? Please share with me here.

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The topic linked below would be a good start if you’re looking the most ideal cruise speed. Though aircraft can go faster, it wouldn’t be ideal.

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THank you!

Hi, Based on your other topic, if you just stay safely below the red line for IAS, you should be mostly ok. That keeps you going as fast as possible without exceeding the important Mach, IAS, or TAS speeds. And the GS will just be whatever the winds will allow.

IAS will almost always seem slow compared to TAS (Mach and TAS are directly related to each other).

IAS being more and more slow compared to TAS as you climb is what allows aircraft to be efficient at high altitude.

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I’ve collected information, including MMO, for all aircraft in IF here:

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Thank you guys!

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