That gap is opening indeed quite a bitseense wrote: ↑18 Nov 2021, 14:14Went looking for it and indeed it is noticeable in france allready. You can see the gap increasing especially on the right side. Interestingly; the gap is increasing a lot also at the "fixed" point on the end plate. Not really a fixed support in that direction then.flmkane wrote: ↑18 Nov 2021, 01:42Yes they can do that. Quite easily.
The hard part is doing that AND passing the test.
Edit: just for the record, I've seen it being done. I've held the prototypes for the fiber layup on the x29 wings. Torsional stiffness was different depending on the the direction of applied torque.
All this requires is a flexible main plane. Bending torsion coupling would not be needed (although it may be needed to do get an aerodynamic benefit out of it)
Passing the test would not be an issue at all, AFAIK the main plain is not being tested separately, only the total rear wing. The main plane could be made of rubber and it would still pass the rear wing deflection test (but with a rubber wing it would likely fail the DRS gap test....)