Black and white cartoon-style technical illustration for an engineering science cover page. A small quadcopter drone is hovering in mid-air, slightly tilted as if correcting its position. Around it are simplified physics and control system elements: force vectors, stability arrows, feedback loop diagram elements, and a small PID controller box drawn in a technical sketch style. The drone has a friendly, simple design (rounded shapes, minimal details). It looks like it is actively stabilizing itself. Subtle humor: a small text or thought bubble saying “presque stable…”. Clean engineering drawing style, thick black ink lines, minimal shading, high contrast, white background with light technical annotations. Educational, modern, and suitable for post-secondary engineering students. Centered composition for A4 book cover. Mehr sehen