Cruising Speed

Wait cruising speed do you use for flying at like an altitude of 28k plus when your switching from knot to Mach because I want to do it the right way saving my time and I usually fly at the highest Mach take for example if flew from YSSY to WSSS with the a380 at Mach 88 what should I have done properly or realistically

The A380 typically cruises around .85 :)

The cruise speed varies with Aircraft, for example; A380/777/A350 would cruise at M.085, while the A330 would cruise at M.80-.82.
Smaller jets such as the A320/737 typically cruises somewhere between Mach.77-.80, while the E-Jets cruise at around M.77

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Hey there!

Have a look at this topic:

While it focuses on fuel burn it also contains ideal cruise speeds for each aircraft (under “Tested Speed”). As another option, you can also use a flight planner which will give you an optimal cruise speed based on various factors.

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For most heavy aircraft, such as the Airbus A380, maintaining a speed of 320 knots below an altitude of 28,000 feet typically corresponds to approximately Mach 0.85. This speed is optimal for cruise and may vary depending on the aircraft’s weight and other factors. For precise calculations, it is advisable to refer to the relevant performance tables above.

I understand but like in general what speed should I maintain so long haul flights a330/a350/a380/B777/787 medium haul 767/a330 short/regional flight? My apologies of this was confusing

A350/B777/A380/B787: Mach 0.85
A330/B767: Mach 0.80 to Mach 0.82
A320/B737: Mach 0.77 to Mach 0.80
Embraer E175/E190: Mach 0.77

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• Long-haul flights (A330, A350, A380, B777, B787): Mach 0.82–0.85
• Medium-haul flights (B767, A330 on shorter routes): Mach 0.80–0.82
• Short-haul/regional flights (A320, B737, etc.): Mach 0.78–0.80

Speeds depend on weight and conditions.

Okay thank you but what are the disadvantages at flying per say at Mach 88 other than quicker fuel burn?

That’s the main thing (Fuel Burn increases). If you value realism, it’s not realistic to cruise at .88, but you’re obviously free to do so if you wish.

Thank you my friend in fact I do value realism so I will take this t mind thanks

Nothing but you will get violation when you run out of fuel.

I figured that because I was doing a flight from from KEWR-OMDB and I lost fuel like close to Kuwait

Now what about landing speeds for each plane is there like a link so you don’t have to type it all out

Honestly I don’t know if there’s a guide, I just adjust it towards like 130 until the AoA looks reasonable.

That’s why you should always maintain Mach 0.85 and monitor the fuel from time to time.

To calculate landing speed, you may use this website

This site also has the recommended Mach speeds for each aircraft (near the bottom of the page)

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make a flight plan on simbrief and put a value between 0 and 999.
Its the relation of cost of fuel and cost of time. It will give you your cruise altitude and speed.
You can just search on google “emirates a380 cost index”

“Keep in mind that the air accelerates when it flows over certain parts of the airplane, like the top of the wing, so an airplane flying at 500 mph could have air over the top of the wing reach a speed of 600 mph. How fast an airplane can fly and still be considered in subsonic flight varies with the design of the wing, but as a Mach number, it will typically be just over Mach 0.8.”
High-Speed Aerodynamics | Aircraft Theory of Flight

“This can lead to the formation of shock waves, which increase drag significantly and can cause instability and control issues”
Transonic Flight | SKYbrary Aviation Safety


This is what I use I’ve memorised this already.
It is a very accurate and reliable table.
Ps: @YAWspeed

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Hi,
These speed seem good indeed. I have a question about the Q400 : I guess you mean TAS and not GS, but do you have an IAS speed in mind, because that is what’s needed.
Thanks.