Not something you see every day

Originally Posted by XabbaRus

The thing is if you give two independent sets of designers the same problem chances are they will come up with similar looking solutions.

Infinite monkey theorem?

[Tchocky]

Originally Posted by XabbaRus

I do get tired of the copying argument. Yes as Max said they copied some stuff but I can't see how you can acuse the Russians of copying the US when you put a Flanker next to an F-15. Planform is different.

Yep, it looks like the Su-27 family are designed as full lifting bodies using wings and fuselage, whereas the F-15 has a massive wing to do the work, and a fairly slab-like fuselage.
Su-27 is a bit bigger, too.