Steampunk biomechanical tattoo sketch for full sleeve and chest plate, isolated on clean white background. Centered on the chest is a vintage solid-fuel reactor core with visible burning coal texture and heavy iron framing. The machinery extends smoothly onto the arm as a full sleeve made of bronze gears, heavy pistons, and steam valves. High-contrast black and grey ink style with selective warm orange fire accents on the chest. Fine lines, cross-hatching shading, masterfully drawn tattoo design