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Spirit GT, Issues with GeoLink, Altitude Limit
https://www.spirit-system.com/phpBB3/viewtopic.php?f=20&t=4814		 Page 1 of 1
Author:  Ahmad.Kassem [ Fri 06. Aug 2021 7:16:01 ]
Post subject:  Spirit GT, Issues with GeoLink, Altitude Limit
Hello Spirit Team

Today I was flying and I had a problem with my Spirit GT, I always activate the altitude limit once I take off and reach 5meters, my altitude limit is set to 2 and 100 meter, and i always go down slowly to to below 2 meter to see if the altitude limit feature is working properly or not, so today I was flying and i flew three batteries and on the fourth battery I take off I reach 5 meter I activate altitude limit then I was slowly decreasing altitude to test the feature as always but this time when the Heli reached the 2 meter the unit applied negative pitch by itself and the Heli smashed violently to the ground, I tried to retrieve the logs but for some reason the logging feature was disabled and the flight counter wad reset.

I attached the screenshot

any advice why did that happened.

Attachments:
Setup2.4ds [255 Bytes]
Downloaded 68 times
log.png
log.png [ 177.79 KiB | Viewed 403 times ]
spirit-log-2021-08-06-081044.pdf [65.04 KiB]
Downloaded 67 times
Author:  swash23 [ Fri 06. Aug 2021 8:32:52 ]
Post subject:  Re: Spirit GT, Issues with GeoLink, Altitude Limit
Hello,

just a question: Which parameters at which rate did you log in the Spirit GT?

Thanks
Author:  Ahmad.Kassem [ Fri 06. Aug 2021 8:47:46 ]
Post subject:  Re: Spirit GT, Issues with GeoLink, Altitude Limit
The rate was 50Hz and i think i selected 90% of the parameters but cant remember exactly

Sent from my SM-N976Q using Tapatalk
Author:  ZeXx86 [ Fri 06. Aug 2021 13:17:14 ]
Post subject:  Re: Spirit GT, Issues with GeoLink, Altitude Limit
Hello,

that is very sad.

RealTime log data could be resetted when unit was turned off exactly when flight log was clearing. For example when memory was completely full it is doing clearing to allow new logs.
But we already found way how to resolve the issue and from new firmware 3.3.2 it should not happen even when clearing the logs anymore.

Unfortunately the issue related to Altitude Limit is resulting usually due to very high vibration level.
This page should help with the issue:
http://manual.spirit-system.com/index.p ... tion_drift

Alternative possibility is when unit is changing collective pitch very hard, it can cause very big stress to mechanics. Can you check if some of push rod plastic was broken?
If one linkage or servo is not moving, it can look like when collective pitch was changed, either up or down, mostly in the highest available pitch.
In the Expert Settings there is Rescue - Smoothing Factor that might reduce stress noticeably. Value 1-3 can avoid this issue in the most cases. Default is 1 so probably it is already configured.

Your settings file can help a lot for finding possible issue.
Author:  Ahmad.Kassem [ Fri 06. Aug 2021 13:44:44 ]
Post subject:  Re: Spirit GT, Issues with GeoLink, Altitude Limit
I already attached the setup file, kindly check

Sent from my SM-N976Q using Tapatalk
Author:  ZeXx86 [ Tue 10. Aug 2021 8:22:09 ]
Post subject:  Re: Spirit GT, Issues with GeoLink, Altitude Limit
I have checked the log. Some values seems to be possibly configured not correctly - for example Pirouette Consistency is probably too low for optimal performance.

But regarding F.Port, we have support for version 1, since version 2 is still under development and documentation is now available. ACCESS receivers are already at version 2 however. I am afraid this could result in unexpected behavior. We have no experience with F.Port 2 yet.

So we recommend to use SBUS and SPORT in this case. It was very likely reason for such behavior :(
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