VTOL using balance

a) stable, b) will be falling "backwards", c), d), e) examples of poses

One use of pendulum balance could be for VTOL (Vertical Take Off and Landing) in cases where the wheels can't roll on the ground like for example a small remote controlled airplane landing on some unprepared ground.

However if the wheels can roll on the ground, there would be a more stable and simpler solution where the wheels also are equipped with a server similar to the Segway.