Engineers Harry Hitchins, Hubert Cecil Booth and Walter Basset designed the Vienna Ferris Wheel so that it can be operated by hand in case of a power cut. The idea was to make the Ferris Wheel operational at all times. In the 20th century, there were many instances where the wheel was operated by hand. But today, there are rarely such instances. It takes a lot of manpower to operate the giant Ferris wheel by hand, owing to its huge size and height.