Cheng Yan travels through time, only to end up becoming an honorable prince in the Middle Ages of Europe. Yet this world was not quite as simple as he thought. Witches with magical powers abound, and fearsome wars between churches and kingdoms rage throughout the land. Roland, a prince regarded as hopeless by his own father and assigned to the worst fief, spends his time developing a poor and backward town into a strong and modern city, while fighting against his siblings for the throne and absolute control over the kingdom. Join Roland as he befriends and allies with witches and, through fighting and even farming, pushes back invaders from the realm of evil.
Of course, the difficulty of producing the two types of radio communications equipment was not on the same level. The engineering team was still in the process of trying to create the vacuum tube, the core part of the AM transmitter.
Failed prototypes had already piled into a small mountain outside the lab.
Edith's suggestion of modifying 'Fire of Heaven' in her report excited Roland. On the technical level, it was not difficult to move a thirty-five millimeter sniper cannon onto a biplane. All they had to do was embed the entire body of the cannon below the belly of the plane and remove the shooting seats. If they limited the ammunition they carried to less than ten rounds, the weight would be balanced out. Other than that, nothing needed to be changed.