On Thu, 11 Jul 2019 14:27:23 -0700, unclhank wrote:

Most of the airfoils of that vintage will benefit from turbulators on
the bottom to slightly help the high speed portion of the polar.
The key from my experience with unflapped ships is to discipline
yourself to not fly too fast and use the better glide angle that results
to do less time climbing.

Agreed, and I have them fitted on my H.201 Libelle to improve fast
cruise. Other gliders with the same wing section may also benefit -
Glasfaser knows exactly where to put the undersurface turbs on the
Wortmann FX66-17A2-182 section.


--
Martin | martin at
Gregorie | gregorie dot org