Dear all,
After the winter break, I flew my Goblin Kraken 580 first time last weekend and today. It has the Spirit GT (Software version 3.7.1 this weekend and version 3.7.2 today) and the Geolink V2 (software version 1.4.1). I set the "Altitude Limit" function to 6 meters and turned it on after takeoff.
While performing a looping at higher altitude, at the top of the looping the "Altitude Rescue" was suddenly activated and caused the helicopter to climb upwards. It was no longer controllable at that point. I was only able to regain control after turning off the "Altitude Limit."
After a short flightime without the "Altitude Limit," I turned it back on, and the helicopter immediately leveled itself and climbed uncontrollably again.
In the "Advanced Flight Viewer" an altitude between 20 and 80 meters was logged, well above the set limit of 6 meters.
Does anyone know this problem?
What could have happened and how could I fix the problem?
Thanks, Thomas
Altitude Limit was activated far above configured altitude
Yesterday I flew with my second Heli, T-Rex 550, also with Spirit GT and Geolink V2. There were no problems with altitude limit. I have compared the settings and there are only minor differences. Regarding the help-text for this different points, they do not have any affect at altitude limit.
I still don't understand why a parameter can have such drastic effects, but since I set the parameter Geo-Link/Aid-Tab/ Triggering Acceleration from value 5 to 0, I no longer had unusual behaver on several flights.
Can someone tell me which values are possible and useful?
Can someone tell me which values are possible and useful?
Hello,
the problem could be related to a low temperature near 0°C. If it is too cold and GeoLink is mounted right under main blades a water condensate could appear at the pressure sensor.
From then altitude measurement could be imprecise. It is better to accomodate helicopter to this temperature first and preferably have it hot and go flying before it could get too cold.
Triggering Acceleration is parameter to engage Rescue faster when model is flying faster. Because if it is fast, it require longer reaction time to save the model. If flying slower even value 0 is fine.
the problem could be related to a low temperature near 0°C. If it is too cold and GeoLink is mounted right under main blades a water condensate could appear at the pressure sensor.
From then altitude measurement could be imprecise. It is better to accomodate helicopter to this temperature first and preferably have it hot and go flying before it could get too cold.
Triggering Acceleration is parameter to engage Rescue faster when model is flying faster. Because if it is fast, it require longer reaction time to save the model. If flying slower even value 0 is fine.
Spirit System developer
Today, at 26 degrees Celsius, I had the problem again on two flights with my Goblin, but not with my T-Rex 
It happened after 2 to 3 minutes of flight time during turns and inverted flight. Turning it off works, but turning it back on doesn't. The helicopter immediately moves upwards.
Within both log-files the altitude suddenly go into minus, after landing its at minus 90 or 100m.
How can this error be fixed?
It happened after 2 to 3 minutes of flight time during turns and inverted flight. Turning it off works, but turning it back on doesn't. The helicopter immediately moves upwards.
Within both log-files the altitude suddenly go into minus, after landing its at minus 90 or 100m.
How can this error be fixed?
Last edited by heli_tom on Tue 17. Jun 2025 19:25:53, edited 2 times in total.
Could you please shate your settings file?
I will check what could be reason.
I will check what could be reason.
Spirit System developer
I hope, I have added the correct file.
- Attachments
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- Settings heli_tom 17-06-2025.4ds
- (255 Bytes) Downloaded 536 times
Hi,
have you checke the settings file?
Are there any settings to change?
Today I tried it again with this heli, first fligt was without problems.
Second flight, after about 1.45 minutes the altitudecontrol was activated in ca 42 meter. I landed after short time and stop the motor. Than I powerup the motor again and start the heli. Switching to altitudecontrol, nothig happens, everything is ok. After landing I checked the protokols. There are two protokol, one befor (9.log) and one after the short landingbrake (10.log). In protokol 09.log is shown the negativ altitude at time of 1.45 minutes.
I will add both protokoll to this post.
have you checke the settings file?
Are there any settings to change?
Today I tried it again with this heli, first fligt was without problems.
Second flight, after about 1.45 minutes the altitudecontrol was activated in ca 42 meter. I landed after short time and stop the motor. Than I powerup the motor again and start the heli. Switching to altitudecontrol, nothig happens, everything is ok. After landing I checked the protokols. There are two protokol, one befor (9.log) and one after the short landingbrake (10.log). In protokol 09.log is shown the negativ altitude at time of 1.45 minutes.
I will add both protokoll to this post.
- Attachments
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- 9.log.4dr
- (53.09 KiB) Downloaded 531 times
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- 10.log.4dr
- (20.55 KiB) Downloaded 502 times
Hello, any idea about my problem with negative altitude?
I'm wondering which part could be responsible. I found a post in the forum that states that the Spirit GT's altitude sensor is always used to determine altitude, not the Geolink's altitude sensor, nor the GPS data.
Is this still the case?
Could my setup in the helicopter play a role, where the Spirit GT is directly below the receiver, which in turn is directly below a swashplate servo?
I'll upload some pictures for illustration.
I'm wondering which part could be responsible. I found a post in the forum that states that the Spirit GT's altitude sensor is always used to determine altitude, not the Geolink's altitude sensor, nor the GPS data.
Is this still the case?
Could my setup in the helicopter play a role, where the Spirit GT is directly below the receiver, which in turn is directly below a swashplate servo?
I'll upload some pictures for illustration.
- Attachments
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But if you connect one extend USB and connect software (outside with all geolink satellites) and raises and lowers the helicopter with your hands the barometer and laser reading of the geolink it's precise?
my reading barometer It is accurate to within 10 centimeters.
0 meters
0,10 meters
0,20 meters
Ecc ecc
And how do you read the height? (On the table without blade, use a USB extension cable)
my reading barometer It is accurate to within 10 centimeters.
0 meters
0,10 meters
0,20 meters
Ecc ecc
And how do you read the height? (On the table without blade, use a USB extension cable)