On Friday, March 4, 2016 at 1:14:43 PM UTC-8, Robert M wrote:
If you do a lot of thermaling they likely will show some benefit in a slightly faster roll rate. However in cruise if you are not flying absolutely in trim they will shed a vortex that just creates drag. It may be better to make the gap as small as practical and have the two sides of the gap smooth and parallel. The ASW-19 wing is very flexable; closing the gap fully or even almost fully will result in binding or even locked ailerons due to the flex of the wing.

Robert Mudd
Composite Aircraft Repair
Moriarty, New Mexico USA.

- Never seen Asw-19 with a plate sealing inboard edge in any of the US based Asw-19s; had mine in red, numerous times, with substantial wings flexing....and never felt there is ANY need for any modifications to controls. Its a glider with a standard type certificate, so Schleicher most likely knows better what is required or isn't... What I had also seen is numerous factory "unapproved" modifications to Asw 19, mostly in Europe, and this plate falls in this category.
GK