New family of blade profiles

[Jean Claude]

Tittle: THE ELABORATION OF A NEW FAMILY OF HELICOPTER BLADE PROFILES
Author: J.-J. Thibert
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19810011503.pdf
Comments: Airfoils ONERA OA-207, OA-209, 0A-212.

 

[RotoPlane]

Thank you Jean for this interesting blade profile link.

It made me feel more confident with my tapered (1/2"/ft.) blades. I was going to use the 0012 profile due to using a swashplate for blade pitch control but this paper showed that the OA-212 can perhaps provide more lift with less rrpm and it is also worth comparing it to the VR-7B (with tab).