Here is a picture of the spar doubler offered by the German company 
AD&C, installed on the bottom surface of a Blanik wing.  It  looks like a pretty neat solution, if a bit expensive.
A few gliders in Europe (most notably the 
Blanix aerobatic team) are flying with a conditional "Permit to Fly" (similar to our EXPERIMENTAL category) using this doubler.  Full approval by the European authority is expected, and FAA will probably rubber-stamp the approval some day.
The latest 
news from the factory is that they are still working on a solution of their own, and they have promised more news in July.
 
1 comment:
Is that spiffy red & gray paint job included in the price ?
Latest news from the factory,
"we expect to have our own cheaper & reasonably priced solution ready by the time your club's flying season comes to an end".
Have a nice day.
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