NACA M21 (NACA-TR-221)


New! Bulk download of polars in Excel format: NACA%20M21%20%28NACA-TR-221%29.xlsx


Info | DAT and DXF files | Shape | Venkataraman Fit | Applications (0) | Similarly shaped airfoils
Plain Flapped Shapes: 25% flap chord | 30% flap chord | 35% flap chord | 40% flap chord
Dynamic plotter New!
Basic Data: cl vs α | cd vs α | cm vs α | cl/cd vs α | cd vs cl | cl/cd vs cl | cl vs cd | cm vs cl | Curve fits | Lift curve slopes
Data source comparison (Codes, CFD, Wind tunnel)
Compressibility Effects: cl vs α | cd vs α | cm vs α | cl/cd vs α | cd vs cl | cl/cd vs cl | cl vs cd | cm vs cl
Roughness Effects: cl vs α | cd vs α | cm vs α | cl/cd vs α | cd vs cl | cl/cd vs cl | cl vs cd | cm vs cl
Plain Flap Effects: cl,max vs flap deflection: all flap chords | 25% flap chord | 30% flap chord | 35% flap chord | 40% flap chord
Plain Flap Effects: cl vs α for various flap deflections: 25% flap chord | 30% flap chord | 35% flap chord | 40% flap chord
Plain Flap Effects: cm vs α for various flap deflections: 25% flap chord | 30% flap chord | 35% flap chord | 40% flap chord
Plain Flap Effects: cd vs α for various flap deflections: 25% flap chord | 30% flap chord | 35% flap chord | 40% flap chord

Disclaimer: All information presented herein is delivered without guarantee or warranty of any kind. The user assumes the entire risk of use of this information.


Angle (deg),
positive is trailing edge down
DAT File
5NACA M21 (NACA-TR-221)FLAP5C35
15NACA M21 (NACA-TR-221)FLAP15C35
25NACA M21 (NACA-TR-221)FLAP25C35
35NACA M21 (NACA-TR-221)FLAP35C35
45NACA M21 (NACA-TR-221)FLAP45C35
-5NACA M21 (NACA-TR-221)FLAPM5C35
-15NACA M21 (NACA-TR-221)FLAPM15C35
-25NACA M21 (NACA-TR-221)FLAPM25C35
-35NACA M21 (NACA-TR-221)FLAPM35C35
-45NACA M21 (NACA-TR-221)FLAPM45C35