Agile 5.5 dampers

[treff]

I quick question if anyone can help. Is it necessary for the feathering shaft to turn freely in the head dampers.
I ask because the ones on my 550 are very, very tight. I have greased them up but I can not turn the feathering
shaft by hand. Does this matter? Appreciate any thoughts Thanks

[Paulos]

The feathering shaft should be tight in the dampers, or at least there should be no play :-)

[treff]

Thanks for the reply. Should the feathering shaft be able to turn?

[tomatwalden]

Thanks for the reply. Should the feathering shaft be able to turn?

No. If you think about it, the blade grips spin on the thrust and radial bearings. Often, they're pitching in different orientations. The feathering shaft is not required to turn at all.

[treff]

Thanks to all. Yes it's what I thought really just keep doubting my own reasoning lol (old age) Incidentally I found the fault on my Agile 5.5. It turned out to
be an intermittent tail servo. Sometimes working other times not. Found out today with the heli about 20 feet off the ground. It stopped and helicopter spun like crazy, then
luckily started again so landed without problem. Its either the servo which is rjx hv tail servo or the port on Brain FBL unit. Just another question will this type of servo work in
the old analogue servo tester.
I'm not sure if it will. Thanks again.

[bigpops]

No, it won't. Hobbyking do a servo tester that you can use with 760us servos.

I have one, and it does work. Turnigy 760LV-HV Dual Pulse Width Selectable Servo Tester (UK Warehouse)

If you have an old gyro that can run such a servo, you could try that. Make sure the gyro is in rate mode. The Align GP750, GP780, Futaba GY520, Spartan DS760 and Quark, plus a few others can all use such servos.

[treff]

Thanks bigpops, that info very welcome indeed.