timbo wrote:Well, it did - high AOA performance of S-37 was quite impressive, but vibrations were too high at transonic speeds.
In case of F1 I remember that F399 had FSW arrangement of the flap.
The problems of vibrations in relation with speed were different from the vortex problems.
The speed related drag and wing flapping was due to the divergence of a FSW.
The vortex developed at low speed on the whole envelope.
Actually the AOA performance of the plane were not so good, they achieved 45° (which is today no something rare) a the expense of huge canards that has to flip all over the time to compensate for the negative stability of the plane while providing interaction with the flows on the wing.
The prototype of S-37 was 5g limited, and the problems on the wing made SDB forced to add titanium on the wing that represented 1 more ton on this already really fat bird.
The X-29 program encountered some analog problems and in final ended up with more drag (especially at AOA which was precisely were the FSW should have been better) than a classical wing.
Now, replaced in F1 the problem of divergence may appear and prevent for passive flexing to diminish drag.