Have any of you seen a failed double cardin stock D2 shaft? I am wondering about the failure mode.
It seems that if the forward-most u-joint in the DC fails then the H-section [the "main" double-cardan component] would try to fling [~pivot 90° from its operating angle] centrifugally outward.. causing UFIO syndrome [Unstoppable Force -- Immovable Object] with anything it encounters [anything, in this case, being an aluminum gearbox].
It seems that if the forward-most u-joint in the DC fails then the H-section [the "main" double-cardan component] would try to fling [~pivot 90° from its operating angle] centrifugally outward.. causing UFIO syndrome [Unstoppable Force -- Immovable Object] with anything it encounters [anything, in this case, being an aluminum gearbox].