Jet fighter is able to trickily maneuver upside down due to vectored thrust for lifting itself mainly in the air.
However any commercial airplane can fly through lifting force on the airfoil wings based on Bernoulli's equation, but it will crash after flipping over.
The force can lift Boeing 747 (almost 900,000 lbs) via a 260 feet long wings made of aluminum which can take care of all the stress including dead, live, environmental and other loads. It is amazing.
Similarly, light aluminum can afford all the loading in a good design electric bicycle which is same as bridge truss shape.
Thus, there is a good way to follow the basic rule for minimizing ebike weight as engineers design airplane.