Realistic : Make it whatever class but give it a twist where it has to be relatively mechanically possible. No planes that are just a prop with maxed size and so on and the "body" is just a chandelier of wings. Planes actually have to have a body and such.
Active : all activation groups are turned on
Army : military type vehicles
Cargo : it has to be big like a cargo plane of some sort
Hybrid : the plane has to use both props and jets
That's all I got : I'll make more when/if I think of them write your own if you have any ideas
@Geekpride yeah, that was my 'afterthought' it has to at least be X big
Instead of the Cargo tournament, they could do one where the planes have a minimum size as well as a maximum - that'd get some bigger planes entered.
@AstleyIndustries yeah I figured
Most of them cant be checked with code