Today maiden with my new Logo 550 SE with Spirit GT 3.3.2
With the initial cyclic gain setting 55 the model oscillates in both axes heavily. I turned cyclic gain down to 20. Now it is better, but oscillating persists.
What can I do?
Model oscillates in elevator and aileron axes with Spirit GT
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weixelgeist
- Posts: 37
- Joined: Fri 26. Aug 2016 21:33:31
Could it be the reason is a to high servo frequency setting?
Hello,
it seems that your Geometry 6° value is way too high. Probably basic settings was not OK. Then incorrect value for Geometry can appear.
Can you let me know what value was configured?
You can share your settings file, this would be helpful.
Cyclic Gain should not be reason for this. It should not oscillate even with very high gain.
it seems that your Geometry 6° value is way too high. Probably basic settings was not OK. Then incorrect value for Geometry can appear.
Can you let me know what value was configured?
You can share your settings file, this would be helpful.
Cyclic Gain should not be reason for this. It should not oscillate even with very high gain.
Spirit System developer
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weixelgeist
- Posts: 37
- Joined: Fri 26. Aug 2016 21:33:31
The Value is 150
Here is the file
Here is the file
- Attachments
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- Logo 550 SE Bank0.4ds
- (255 Bytes) Downloaded 57 times
That is very high value. For Logo 550 value is usually around 100-120.
For this reason I recommend to check Subtrims.
Please tick Servos/Subtrim (tuning). Then verify that all servo arms are in the middle and that there is zero pitch between main blades.
Is this correct?
For this reason I recommend to check Subtrims.
Please tick Servos/Subtrim (tuning). Then verify that all servo arms are in the middle and that there is zero pitch between main blades.
Is this correct?
Spirit System developer
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weixelgeist
- Posts: 37
- Joined: Fri 26. Aug 2016 21:33:31
I am on the field now. I will check it at home.
Now I have the value of 70.
With 70 it works fine.
Now I have the value of 70.
With 70 it works fine.
It is recommended to measure it precisely, because it has very, very big impact on overall flight performance and behavior.
Spirit System developer
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weixelgeist
- Posts: 37
- Joined: Fri 26. Aug 2016 21:33:31
I checked it, I have had -2,5 degrees pitch.ZeXx86 wrote:That is very high value. For Logo 550 value is usually around 100-120.
For this reason I recommend to check Subtrims.
Please tick Servos/Subtrim (tuning). Then verify that all servo arms are in the middle and that there is zero pitch between main blades.
Is this correct?
I corrected this, now 6° Geometry is at 130.
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weixelgeist
- Posts: 37
- Joined: Fri 26. Aug 2016 21:33:31
Today I testet the new settings but oscillating keeps on.
Is this a problem of the Spirit GT?
One year ago I had another Logo 550SE with the Spirit Pro and there was no oscillating problem even with the standard settings.
Is this a problem of the Spirit GT?
One year ago I had another Logo 550SE with the Spirit Pro and there was no oscillating problem even with the standard settings.
Value for Geometry 6° is still looking very high.
Is the model after crash or was it flying perfectly previously?
Is RPM low or normal flying RPM for such helicopter?
Is the model after crash or was it flying perfectly previously?
Is RPM low or normal flying RPM for such helicopter?
Spirit System developer