Well, your plane has to be deemed good by some feature gods, and if they think it's kewl, then they use their epic powers to put it on the front page. I mean, I guess it involves some luck too, as some builds that I think should be featured aren't, while i've already got 7 features. Trust me, you deserve one :)

It needs to be good and represent what you can do ingame.

I don't know