WOULD KNOW THIS ONE. You can add all the feathers you can harvest (please make sure they’re not from endangered species). You can stick them on with wax. You can flap until your arms are tired. If the system isn’t engineered for flight from the ground up, it’ll have all the aerodynamic qualities of a brick.
It’s almost as though they’d all been paying attention to irrelevant stuff (such as fallacious theories of pedagogy) and ignored — you know — the actual subject matter.
Now, why would you do that?