Question for Blade-Builders

[SDC]

At the same time, you continue to do this. Moreover, you are trying to accuse me of not understanding formulas, despite the fact that I didn’t say a word about it, but wanted to hear from you first about it, since you brought it up as an argument and at the same time in the essence of this argument You didn't write anything.
Also, the issue with cardboard, about which I have already written to you at least three times, has not been resolved.
And the third is the Donic Epox Topspeed blade, which for some reason is not made of three layers with a one and “stiffer single layer” core, in your words.

I won't. Here's a little reading material for you, have fun. But if you studied a bit of this like I did, you shouldn't need it. http://www.engineeringcorecourses.com/solidmechanics2/C2-bending/C2.2-composite-beams/theory/

If you agree with what I say then good, if you don't that's good too. Happy Christmas!