8. A Piper Cherokee is flying at 4000 ft standard altitude at105 mph. The wing has a rectangular planform (shape) with a span of30 ft and a chord of 5.33 ft. Assuming that the turbulent boundarylayer grows as on a smooth plate and a completely turbulentboundary layer flow, determine: (a) The boundary layer thickness atthe downstream edge of the wing. (b) The total skin friction dragcoefficient of the wing. (c) The total skin friction drag of thewing in pounds.
9. Repeat the analysis for Prob. 8 assuming that the boundarylayer is laminar.
