If one looks at the photo on P9,#162,to me it appears that there is slightly more `up` elevator than the left one.I`m only gauging that from the shadows on the mass-balances.Now ,if one is putting UP elevator on one side ,and the tab on the opposite side is forcing Down,then there will be a difference in tension on both sets of elevator cables,and on the bolts holding both torque tubes together.Could lead to cable stretch,possibly sufficient to disengage from the pulleys and guides,or cause the bolts to `fret` or loosen.
Think the chance is greater for the torque tube straining the attachments internal to the elevator. For Voodoo, the cables didn't jam, but everything getting beaten up if the 1st flutter mode is excited, so GG could be different.
The plunging, or first flutter mode is when the tips go up and down and the node, the part that doesn't move, is the centerline, as shown in the first part of the video. The counterweights and elevator deflection can drive this;
This would be different than the 2nd mode;
Hard to tell, but this excited the 3rd mode;
God knows what this is, turning a solid to a fluid maybe, and back again'
All of these are different than simple control surface flutter that sycamore experienced with the aileron, and up till now, everyone thought the trim tab was doing. Since the HS went into 1st mode flutter, if the video can be believed, then this could also be explained by an elevator getting loose from the torque tube, the fuselage snapping back from ti's twist, and getting things going. Bending the tab spanwise in this mode would explain why the inner part of the tab separated leaving the outer section attached. If the tab rod failed, the whole tab would flutter and rip off in one piece.
If the right elevator torque tube attachment failed, and the pilot was pulling 30 pounds of so, the left elevator would be over deflected and the right elevator up load would decrease causing the left roll without a pitch change. It would take a few 1st mode oscillations for the tab to fail, which would happen sooner if it was stiffened after Voodoo, and would happen very fast from the maybe 50 to a 100 hertz. Don't know if he camera can capture 50 hertz, so we might be looking at an illusion. But the theory ties everything in so far; the roll, the fuselage wrinkles, the tab breaking in half, the g occuring after the roll correction... .
Found the hinge moment report. The elevator bulge is standard for the D model
and there's still a slope change with Mach number on hinge moments.
http://naca.central.cranfield.ac.uk/...ca-tn-1302.pdf