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等集成 DCS Spitfire IX Flight Manual CN.pdf

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For energy and G calculation , it must use TAS. Mach number is from TAS, not IAS.

You know there is no TAS indicator on most early wwii fighters. But in every performance test charts from the test flight it was converted to TAS. Do you know why?

Do you know the Mach number is TAS/speed of the sound at that condition?

The performance of an aircraft mainly are how fast and how high it can fly, how tight and how fast it can turn, and climb, etc. you will unlikely to see IAS in it.

Can you understand the steady turn is a constant radius turn? Wind just make the turn center move, not changing the radius. Just like a wheel rolling on the ground. Every point on it have a constant turn radius, but the center is moving forward.

Yes. It's a steady turn.

If you can do it with IAS, but more date must be needed such as tempreture and pressure. First convert the IAS to TAS with them, then calculate the rest.

Turn on the smoke during the turn and it will tell you why not count the wind.

That's dynamics. The mesuring the perfomance of an aircraft mostly means kinematics.

For another example, your aircraft is in steady level turn in steady wind. Your IAS is 300 kts, you are pulling 3 G in the turn. Wind speed is 50 kts. You can't calculate your turn rate or turn radius with these information. But if you know your TAS, for example is 350 kts, you can calculate them with it and get your turn rate is 8.82 deg/s, turn radius is 1170 m.