Occasional shudder

[Rowey]

Hi all,
When flying my trex450 sport I am getting an occasional shudder it appears to generated around the helis centre and mainly occurs when banking hard, this has only just starting to happen . All comments gratefully received

cheers

[tomatwalden]

I'd check the servos - do they move smoothly? Both under power, and manually with power removed.
Check all linkages in the swash and flybar assembly.
Possibly the dampers if they're quite old - or maybe the radial bearings ?

[Gixxer]

Head speed possibly too low?

[Rowey]

I'd check the servos - do they move smoothly? Both under power, and manually with power removed.
Check all linkages in the swash and flybar assembly.
Possibly the dampers if they're quite old - or maybe the radial bearings ?

all linkages etc are fine, I have just checked the dampers and they felt quite hard and dry I've greased them and the thrust bearings. Will get out tomorrow morning and try it again

cheers
tom

[Rowey]

Head speed possibly too low?

Headspeed all good ,I/u 1 90%

cheers

[Rowey]

All seems to be well since lubricating dampers/feathering spindle. Not a single shudder today,I think dry dampers was the problem