Flight control was intended to be achieved by weight shift, with the pilot moving about to enable this.
[3][4] In 1987, in an article published in the journal Chartered Mechanical Engineer, Cranfield described a series of trials with the Vertigo, the last of which the pilot was able to achieve the 6 rpm necessary for the craft to fly.
[3] It was reported that "the blades started to show signs of generating significant lift; this was confirmed as the aircraft began to skip around the floor.
"[3] Cranfield reported issues with the transmission, and with rotor performance being affected by their being closely coupled together as needing further attention.
[4] Data from The Helicopter Museum[4] and Chartered Mechanical Engineer[3]General characteristics Performance