S1 Pitts - Elevator vibration

[Charles67]

I can feel a vibration in the stick when I pull ~4 Gs from 180 mph.

I inspected the elevator control system and I could not find anything wrong with it. The tensions in the tail tie-rods are the same that I have had for a long time.

There is a little play in the hinged connection between the left elevator and the left horizontal stabilizer (where the tie-rods attach). Could this be the cause of the vibration? Any other checks that I should do?

Thanks

 

[acroeric]

 

[Charles67]

 

[cgzro]

 

[cwilliamrose]

 

[cgzro]

 

[philly5g]

 

[Charles67]

 

[cgzro]

 

[Morphewb]

 

[Charles67]

 

[Morphewb]

 

[Charles67]