This study designed a vertical take-off and landing tailsitter unmanned aerial vehicle (UAV) with a long endurance time. Nine parameters of the tailsitter UAV were investigated. Using a 2k full factorial test. 512 experiments on the nine parameters were conducted at their maximum and minimum values. https://www.bekindtopets.com/limited-stock-Bovi-Shield-Gold-FP-5-L5-HB-best-super/