Spirit System

Maybe for nitro heli this vibes are not extreme. What is your opinion? Thanks

For nitro heli maybe this vibes are not extreme high. What is your opinion? Thanks

It looks for me very low. Actually too low for nitro.
I can't see a spike from motor, tail rotor or rotor head at all.
This is interesting.

Hello !
As you can see this vibations come from rear (10000 - 15000U/min) - This are revs from rear rotor -
Maybe here is some wrong - what vibrations do you see without tailblades ? Problems could be bended tail rotor shaft, maybe rear blades are disbalanced or the bearings of the rear are no longer okay - or all together -

Best Regards
Mattes61

The heli before was flybar. Was flying perfect witout any issue. Not even foam bubles in the tank. I balance evtng clutch fan hub even tail rotor with blades. Now i convert it to fbl using dfc head. The issue i have as i describe before is thay when is sitting the ground and i apply throttle at high speed all cycling sevors shaking very litle. Maybe 1mm up or down. Do you think that cam be normal because heli sitting on the groung? Or if i try to fly you think heli will tip over? Thanks

You can try to lower value Advanced / Elevator Filter. What is your current value?
What is value for Geometry 6°?

Is the unit holding firmly? Without a flexing of the mounting pad.

Hello !
I think the DFC-Head is a bit to stiff for this heli ? Maybe here is the problem - the dampening of the head could be to rigid. Have you smoother dampeners that you can mount in the rotorhead ?

I don't know how old your heli is but sometimes it is so that you can't easily update to DFC-Head -
The result is that you get some resonance vibrations that did not occur in the helicopter before, for example because a different rotor head was mounted - that would mean that the whole thing no longer works with the DFC rotor head -
The rotor speed may be at this moment relatively close to any one natural frequency of the entire system helicopter - do you see any vibrations on the ground (wobbling, hopping, etc.)?
What you can try is to reduce the head speed til the trembling on the servos disappears - maybe this helps ?


Best Regards
Mattes61

The elevator filter is 3 and geometri is 6. The unit is well mounted on the heli.

You can try to lower to 1-2. What is value for Geometry 6° that you can see in the settings? From this I can say if it is in the right range and could cause such problem too.

Geometry is 6°. The elevator filter i reduce to 1. I will try and i will inform you. You think this can help?