The popularity of drones has been growing steadily, and every day expanding the range of their applications. Some companies (eg, Amazon) want to use drones to deliver orders. However, this delivery method is only suitable for short distances, because drones can stay aloft for about half an hour. Nevertheless, the company Horizon Unmanned Systems had an idea, and they are already working on its implementation. Their Hycopter aircraft can fly from 2.5 to 4 hours, depending on the load. All this was made possible through the use of fuel instead of lithium batteries … [Read more...] about UAV Hycopter, running on gas, capable of flying over 4 hours