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I want to scale down my propeller for a wind tunnel testing. But I am unable to find any literature on it. Please give suggestions.

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The airfoil of the propeller should not change with size if you are scaling it up and down. As long as the airfoil is the same and the proportions are correct relative to both propellers (length, chord, pitch, etc.) that should be all you need to pay attention to.

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  • $\begingroup$ What about the speed? $\endgroup$ – Jan Hudec Nov 3 '16 at 20:43
  • $\begingroup$ The speed of what? $\endgroup$ – Juan Jimenez Nov 4 '16 at 15:20
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    $\begingroup$ Scaling of it. Should the flow speed in the wind tunnel be the same as that of the full-scale aircraft and the RPM of the scaled propeller the same as the full-scale one? I don't think so. $\endgroup$ – Jan Hudec Nov 5 '16 at 21:41
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    $\begingroup$ I was thinking of the Reynolds number. It depends on speed, but also on the size of the structure. $\endgroup$ – Jan Hudec Nov 7 '16 at 9:57
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    $\begingroup$ Ah, I get it now. That will indeed be an issue. Unfortunately, it is beyond my level of knowledge. I did find this paper, which seems to confirm your concerns. m-selig.ae.illinois.edu/pubs/… $\endgroup$ – Juan Jimenez Nov 8 '16 at 15:11

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