Aside from more fuel usage, what makes VTOL planes so much more difficult to manufacture and utilize?

Question

Aside from more fuel usage, what makes VTOL planes so much more difficult to manufacture and utilize?

In: 3

Answer 1

This adds complexity and generally additional weight. This added weight and space taken up by the complexity can be used for other things.

Traditionally airplanes are not designed to operate at low speeds and require additional controls to allow for maneuverability. Again adding to the complexity.

You also need to provide thrust in multiple vectors unlike a traditional aircraft.