At the moment, besides airships, Theodore Korbel and Ludwig Durrell can't think of anything else they can do, so they are very curious and ask Arthur about it.
Arthur smiles without answering directly, but hands over some documents, indicating for them to watch on their own.
After carefully watching all the documents, Theodore Korbel and Ludwig Durrell exchange glances, and then tentatively ask, "Your Highness, do you want us to develop steam-powered airplanes?"
Indeed, although the universally-known inventors of the airplane are the American Wright brothers, many had been exploring the possibility of airplanes even before their successful test flight.
The first recorded airplane manufacturer was Germany's Mochayski. In 1882, he made a steam-powered airplane with wings resembling flat plates, but the test flight failed.
From 1886 to 1890, France's Adelle had also made four steam-powered airplanes, but all of their test flights were unsuccessful.
