Hello,

i have for my TDSF Standard Preset for Henseleit TDR. Working good so far. But when i fly with 900 or 1200 RPM and make Flips, the Heli is Shaking while changing pitch from positiv to negativ if the heli is on "the head". i can see that tail is shaking a little bit and swash also. all other figures no Problem. reducing tail gain or swash gain (is at 55%) no Change.
any ideas?

Greetings christian

No one Idea?

Hello,

each helicopter has a band of head speed when it could shake, especially if it is light helicopter.
This kind of oscillation is mechanical and FBL system can't affect them in any way.

You could try to change head dampeners or add a weight closer to the landing gear or to use a different main blades.
Trying to eliminate any play in the rotor head can also help.

The problem is occuring when doing an autorotation maneuver or anytime when rotor head is without a load.
This is unfortunately design factor of the model itself. Some models are more prone to this than others but there are not too many light helicopters at these days.

To make sure it can't be affected by FBL you can reduce Geometry 6° for a try by 20-30 points. It will be less stable but if there will be still oscillations then you can't do really anything in FBL. It would occur even without FBL.

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Spirit System developer