Armand Charbonneau wrote on 10/12/2019 5:52 PM:
Howling has been there since I started flying about 105 hours ago. zig zag tapes look okay.

I will check the mylar strips (top and bottom) carefully with the wings assembled looking at flap 0.

Did the howling exist before the refinish? Perhaps the zig-zag was not placed in
the correct location, or it's the wrong zig-zag (too thin, perhaps).

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1