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Smoothing the Surface: The Coefficient of Lift and Drag as a Function of Texture

CSEF · 2005 Aerodynamics/ Hydrodynamics

Wolf I. Thielmann · Goleta Valley Junior High School, Goleta

Overview

Objectives/Goals I investigated this project in order to determine how different wings and their surfaces affected their efficiency. Methods/Materials In a wind tunnel, I placed four wings, two were control subjects with smooth surfaces and two were experimental subjects with a surface smoothness that varied from the control wings. I placed them individually in the wind tunnel and using a force probe, measured the lift and drag each wing produced. Results I found that a wing with a smooth surface is more efficient than a wing with an unsmooth surface. Conclusions/Discussion Further extensions of this investigation include finding effective control surfaces for aircraft that create drag and deplete much of the wing#s lift in order to make landings safer. Other possible research applications include finding an airfoil that is more efficient for manned gliders or solar powered aircraft.

Summary statement

I attempted to discover if and how the surface texture of a wing affects a wing's performance

Help received

Recieved Vernier Instruments force probe from school and father assisted in cutting out large wood pieces for wind tunnel using router and skilsaw.

Awards (1)

  • Category Award

Competition history

  • CSEF 2005 Aerodynamics/ Hydrodynamics · Entry J0123

Resources

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