So if the Quimbaya objects are not representations of airplanes, what are they then?
Instead of placing it down as if it would be an airplane, hold it upright. You might start to see some parts of the pattern straight away. Most of the objects have fountains, central shafts and a mouth.
The mouth is a 3d ‘dip’ back into the model. This is significant because a large number of african masks actually display the same dipping shape in the lower half of their faces.