Ascent AeroSystems introduces HELIUS, a sub-250g UAV designed for durability and performance.HELIUS aims to set a new standard for durability, affordability, and capability in the lightweight drone market.Advantages of coaxial drone design include compact design, increased durability, aerodynamic efficiency, and all-weather performance.HELIUS integrates advanced technology, has 30+ minutes of endurance, and is available for pre-order at $4,499.