An airplane with 2 floors. The 2nd floor has to be smaller than the first one.
Realistically or crazy goofy lego style?
but I think his passenger planes are good enough.
He didn't ask about a one floor plane, he asked about two floored planes.
But I don't really see why a 2 floor plane is needed when Phy's plane thing is good enough.
You should probably give a reason as to why exactly you need a plane that has two floors.
Most vehicles with 10+ seats are often useless.