Flying ships powered partially with Arcalum are the main royal vehicles, capable of transporting goods, orb from the Outer Lands' mines or soldiers. There are three types of Frigates - War Frigate, Transport Frigate and Scout vehicles. Basically, powerful turbines provide a push while the strong wings, controlled bio-mechanically, keep the frigate in the air and at the correct altitude.
A concept for my personal project called 'Absolutum'. The story takes place in a futuristic fantasy-like kingdom in totalitarian setting. The world, full of bio-engineering, meta-alchemy and psionics is ruled by the Empress, a quasi-immortal with powerful psychic powers thanks to her longevity and numerous mutations. The magical substance called Arcalum is the base of her power. Arcalum is used to run machinery and weaponry developed by royal meta-alchemists as well as a high-energy fuel source used in air-frigates. The rule of the Empress is eternal and unthreatened. Or so it seems.