This is the “Lilith”, a flying wing type aeroplane, inspired by (and sort of a combination of) Nikolai Teleshov’s flying wing from 1867, and the Butler & Edwards “Steam Dart”, also from 1867. She is propelled by a pulsejet engine, like Teleshov’s aeroplane, and has a fuselage design similar to the Steam Dart. Done in You Doodle. By the way, that square near the top is not a window, it’s a cockpit that ended up looking like a window.