Hello My name is Patricia Jones-Bowman, I am the test-pilot of a full-size, engine powered, piloted ornithopter that we have been testing for 4 years now here in Canada. Recently I have begun work on my own design in collaboration with a small group of engineers. 'Nightingale' [my ornithopter] will take one of two possible forms ...either a monoplane very loosely based on Quetzalcoatlus Northropi or a biplane based on dragonfly flight. I hope to use either a membrane wing or a semi-membrane wing or a hybrid single surface/double surface wing. Has anyone done research into the control of membrane wings or any research into man-made membrane wings ? Has anyone done research into the travel of the shed vortex with the intent of phasing the rear wing flapping cycle [in the biplane] to capture it. Any help that could give me would be greatly appreciated. Thankyou, Patricia Jones-Bowman email: [log in to unmask]