Improvement of stability for vertical take-off of an insect-mimicking flapping-wing system

In recent years, there has been a lot of progress in developing Flapping-Wing Micro Air Vehicles (FW-MAVs) [1–2]. Most of them were designed for low Reynolds numbers environment (in the range of 5,000 to 10,000 [3]). Therefore, many researchers have been paying attention to principle of insect flight for potential application to improve FW-MAVs or to develop even smaller system, called Nano Air Vehicles (NAVs) [4].