Ceiling Laminar Air Flow

The wing on a Piper Cherokee general aviation aircraft is rectangular, with a span of 9.75  m and a chord of 1.6  m. The aircraft is flying at cruising speed (141 mi/h) at sea level. Assume that the skin-friction drag on the wing can be approximated by the drag on a flat plate of the same dimensions. Calculate the skin-friction drag: a. If the flow were completely laminar (which is not the case in real life) b. If the flow were completely turbulent (which is more realistic) Compare the two resul