WIND TUNNEL TESTS OF THE SM701 AIRFOIL AND THE UAG 88-143/20 AIRFOIL

Authors

  • D. Althaus
  • W. Wurz

Keywords:

Aerodynamics, Design

Abstract

The SM701 airfoil was designed by Dan Somers and Mark Maughmer to be applied on World Class sailplanes. The UAG88-143 /20 airfoil was designed by D. Marsden to be used on an ultralight sailplane wing. The measured drag coefficients are higher than those which are calculated by the two codes. The low drag bucket from the measurements becomes essentially smaller with growing Reynolds numbers than predicted by the Eppler code. The XFOIL code, however, has the same tendency like the measurements. The differences between theoretical and experimental restults are due to the existence of separation bubbles (Eppler code) and the different methods for the calculation of the turbulent boundary layers in both codes.

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Issue

Vol. 17 No. 1 (1993)

Section

Articles

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