Stats Card. Does it do what it says on the tin

Ive noticed many planes i fly dont stack up to what it says on its stats card, for example i have been flying today British Spitfire mk XIVe and no way does it do 723 km/h @ 8537m.

One does not simply trusts WT stat cards…
I wouldn’t be surprised if one day there was an aircraft’s max speed “vanilla ice cream” at height of “Apple iWheelchair”…

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Must be why Yak 3 and above fly like sputnik 😆 🤣 😂

If you don’t use MEC, and just 100/WEP the throttle, it’s not actually going to work right.

Stat cards are often misunderstood.

Are you measuring by IAS or TAS?

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IAS, would being horizontal make a difference?

Stat cards show TAS in horizontal flight and typically states the real life airspeed the aircraft can obtain in clean configuration. Another deceptive example is turn time. That states how long it takes for an aircraft to complete a constant rate turn at low altitude without losing altitude or changing airspeed.

Thanks you have clearedup many things about WT and its aerodynamics, your right about TAS and stuff, I thought IAS was the speed of air traveling over the aircraft and TAS was like ground speed as it shows SPD. But TAS is the true speed but IAS is lower because of air density at higher altitude. In theory the plane might do with/with out instructor etc 723 at 8537 but the most i got out of it was just under 700 TAS (400IAS) before engine red lines and that was using MEC with vents to zero.

Google says " At sea level, with an atmospheric pressure of 1013.2 mb, and no wind effect, the indicated airspeed is the true speed of the aircraft relative to the surface. As the aircraft climbs, the air density decreases, and the indicated speed will be less than the true airspeed (TAS) ."

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Can anyone explain the swift f1 stat card. It says max 985km/h @ 3048m but it can easily do over 1000km/h at that height. Is the reason why, is that it’s best turn and climb is at that height?