Oh you mean they flew after you enlarged them, changed the material, and added engines/propellors to them? Gee, giving them much credit yet? One of the things about enlargement is that the small original lacks the information to make a detailed large. For example, if you have a really small picture of Abraham Lincoln, and you blow it up, it's extremely pixelated. How big are the statuettes vs. their flying replicas? Could it be that whoever created the flying replicas interpreted the statuettes such that the wings created the pressure differential required for flight?
I would like a source, so I can be more sure that the statuettes themselves actually reflected understanding of the physics behind lift, or if it was mostly modern interpretation. See, I'm impressed by replica's of Da Vinci's plans that work because he left a lot of information regarding his blueprints, and included dimensions and materials to use, and whatnot. When I see someone grab a little statuette made of clay or whatever, and make a flying replica I'm not so impressed.
Also, I've been to Chichen Itza and I've seen the famous little wall carving thingies that supposedly depict different cultures from around the world, and the little spaceman and rocket thing, and it's complete bunk. It's this tiny little section on a forlorn segment of the wall and it takes a liberal amount of imagination and interpretation to see what you want to see. You'd think that if aliens helped build the freaking thing they'd be depicted front and centre, maybe with pictures of locals kneeling in reverence around the alien and its flying ship or something.