Have you ever encountered these problems on battery-powered multi-rotors: hard to get longer flight time with heavy payload; no efficiency at high altitude or cold winter. YANGDA YD6-1600L gas-electric hybrid drone is designed to overcome these limits. It is using a powerful gas-driven electricity generator which will give you continuous and stable power supply despite the high/low temperature or high altitude, which will enable you to carry out long-range inspection, survey, aerial photography, search, rescue, and public safety applications.