Reijer Stolk’s undated sketch, held at the Rijksmuseum, presents a possible flying machine rendered with graphite on paper. The composition, dominated by sparse lines and geometric shapes, hints at a structure both tentative and visionary. The linear quality of the sketch emphasizes the skeletal framework of the proposed aircraft, while the repeated rectangles suggest a modular design. The wheel, represented by a simple circle, provides a focal point, anchoring the otherwise ethereal form. Stolk's use of line invites us to consider not only the physical structure of the machine but also the very concept of flight and mechanical innovation. This drawing destabilizes the conventional understanding of engineering schematics, moving beyond functional representation towards an exploration of form and possibility. The sketch prompts us to question how we perceive and categorize functional art, and the cultural meanings we ascribe to technological advancement.