Don't make performances secret this time

[PE_Tihi]

Originally Posted by Rama

Define what you mean buy "real numbers"... or your sentence is totally senseless..

When you will have defined what you mean, you'll see that "real numbers" isn't something unique and that among the different values for "real numbers" can be accepted universally... even when you can find sources (that could allow you to calculate "real numbers" in some very specific configurations)

Your proposal is totally unrealistic.

Well, your statement can be seen as a solipsist one - everyone has his own truth. I agree with such philosophy as far as it underscores the respect for the individual world of each of us. But I cannot look at the each of these truths as equal.
Can a plane have a wingspan of 10, 11, and 12,5 m at the same time? Can it have a max. speed of 480, 530, and 565 km/h at the same time?

'....even when you can find sources (that could allow you to calculate "real numbers" in some very specific configurations)'

Try here, you wont have to calculate anything:

http://www.spitfireperformance.com/

These are original wartime test data for a nuber of important types.