knot4u
Repeat Offender
The A-model C-130s with the three blade Aeroproducts propellers suffered from harmonic vibration issues that effected the main wing spar, I think the early L-188s and P-3s had the same issue. Hamilton-Standard solved the problem with a four blade setup that incorporated a synchrophaser into the prop control, if you look at a photo of a C-130 with four blade props in flight you might notice the fact that the blades of the four props are never synced up.I know nothing about that lawsuit... I do know that one of the H&P-delivered C130s (allegedly with uncounted dark hours due to black ops) ended up doing this...