MS airfoils.

     

   Xfoil is a really wonderful "numerical wind tunnel", for low Reynolds airfoil conception use. I designed some airfoils, that are here presented, with the ideas that lead the conception for each one.
   They are sorted according to the date they were created. The last column indicates that some airfoils were designed together, and are linked by a common cell.

Airfoil Use Family
MS1,9/8,7i f3i, f3b, f3f with flaps  
MS2/9,5i f3i, f3b, f3f with flaps
MS3,3/15GP Scale sailplane (root)  
MS3,3/11GP Scale sailplane
MS3,3/11GPT Scale sailplane (tip)

Name :

   Airfoils names does mean something, here are some keys for judging an airfoil at first glance. This is a quite common way to name an airfoil. "MS" stands for Matthieu Scherrer, my name

Général name : MS (camber %) / (thickness %) (main use)


MS1,9/8,7i

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MS2/9,5i

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MS3,3/15GP

  • Design ideas :
          This series of airfoil is the result of reflexions made with JL Michot. He wanted to build a large scale SB10, about 6m span. This is a high AR planform, and root chord is only 200mm. Therefore really small Reynolds number in sight...
       For the root, we then need thickness for an efficient spar, but also a good behavior with small the Reynolds. The HQ3/15 was used as a basis, with in particular the Reynolds issue to be improved.
  • Coordinnates :
          MS3,3/15GP.dat MS3,3/15GP.gif
  • Drag polars :
         
         Variable Re=150000 (corresponding to SB10 root : chord=200mm, Wload=65g/dm˛).

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MS3,3/11GP

  • Design ideas :
          This series of airfoil is the result of reflexions made with JL Michot. He wanted to build a large scale SB10, about 6m span. This is a high AR planform, and root chord is only 200mm. Therefore really small Reynolds number in sight...
       We also needed a profile for the remainder of the wing, less thickand willing to put up with decreasing Reynolds number along the span. Simply an homotethical airfoil is appropriate, here is the same one with 11% thickness. It makes a great progress compared to the HQ.
  • Coordinnates :
          MS3,3/11GP.dat MS3,3/11GP.gif
  • Drag polars :
         
         Comparing with MS3,3/11GPT Re=150000.
         Variable Re=125000 (corresponding to SB10 intermediate : chord=170mm, Wload=65g/dm˛).

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MS3,3/11GPT

  • Design ideas :
          This series of airfoil is the result of reflexions made with JL Michot. He wanted to build a large scale SB10, about 6m span. This is a high AR planform, and root chord is only 200mm. Therefore really small Reynolds number in sight...
        The profile was modified for better fitting at tip : higher Czmax, and less momentum created. This is quite appreciable on a wing with very great AR, that prevents a bit risks of fluttering. You have to pay it with a slightly higher drag.
  • Coordinnates :
          MS3,3/11GPT.dat MS3,3/11GPT.gif
  • Drag polars :
         
         Comparing with MS3,3/11GP Re=100000.
         Variable Re=75000 (corresponding to SB10 tip : chord=100mm, Wload=65g/dm˛).

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