Before revision: cd ItemShapes 0.001 Laminar flat plate parallel to the flow () 0.005 Turbulent flat plate parallel to the flow () 0.1 Smooth sphere () 0.47 Rough sphere ()0.81Triangular trapeze (45°)0.9-1.7Trapeze with triangular basis (45°) 0.295 Bullet (not ogive, at subsonic velocity) 0.48 Rough sphere () 1.0–1.1 Skier 1.0–1.3 Wires and cables 1.0–1.3 Adult human (upright position) 1.1-1.3 Ski jumper 1.28 Flat plate perpendicular to flow (3D) 1.3–1.5 Empire State Building 1.8–2.0 Eiffel Tower 1.98–2.05 Long flat plate perpendicular to flow (2D) Aircraft As noted above, aircraft use their wing area as the reference area when computing , while automobiles (and many other objects) use projected frontal area; thus, coefficients are not directly comparable between these classes of vehicles.
After revision: cd ItemShapes 0.001 Laminar flat plate parallel to the flow () 0.005 Turbulent flat plate parallel to the flow () 0.1 Smooth sphere () 0.47 Rough sphere ()0.81Triangular trapeze (45°)0.9-1.7Trapeze with triangular basis (45°) 0.295 Bullet (not ogive, at subsonic velocity) 1.0–1.1 Skier 1.0–1.3 Wires and cables 1.0–1.3 Adult human (upright position) 1.1-1.3 Ski jumper 1.28 Flat plate perpendicular to flow (3D) 1.3–1.5 Empire State Building 1.8–2.0 Eiffel Tower 1.98–2.05 Long flat plate perpendicular to flow (2D) Aircraft As noted above, aircraft use their wing area as the reference area when computing , while automobiles (and many other objects) use projected frontal area; thus, coefficients are not directly comparable between these classes of vehicles.