“But the AH64 tail went through many many variations as they tried to iron out snags (Low stabiliser, T-tail, vibration dampers, slots etc). The flaps are definitely a bodge![/QUOTE]
I didn’t realize they had so much trouble on the AH-64. I’ve seen the vibration dampers, there are elastomeric mounts where the tail pylon attaches to the tail boom and the stabilator is solid mounted at its hinge fittings.
Which is opposite of UH-60, it has elastomeric mounts for the stabilator hinge fittings, the pylon is solidly mounted to the tail boom.
I wonder why the manufacturers chose their respective vibration absorber locations? It seems that they were both aiming to mitigate vibration induced by the rotor wash impacting the stabilator perhaps?
The stab mount bearings cop a flogging on both aircraft, the UH-60M folding stabilator center box bearings get worn quite frequently, to the point that the allowable vertical deflection of the stab wings at the tips is 7/16” vs 5/16” for the one piece stab on the A/L models.
FltMech