Heli pitch up/down on elevator axis

Hi,

I have had a teething issue with my vbar neo (i am also using the external sensor). The heli has a tendency in a hover to either pitch up or down constantly in the elevator axis. If I leave the sticks the heli will either pitch forward or backward. This behavior remains constant per flight i.e. it will either pitch aft or pitch forward - it won’t be random, never on the aileron axis. It’s not a CG issue because adding or removing weights does not change this behavior. The swashplate is leveled using a swash leveling tool. Please advise as this is really irritating me. Helicopter is a goblin 700.

I have attached pictures showing the swashplate when it the battery gets plugged in. Sometimes it initializes with it tilting forwards or sometimes backwards. Swashplate returns to same position it initialized with after sticks are moved. In 1 picture the swashplate is level because I entered swashplate trim. Is this normal behavior?

Thanks



Edited 2 time(s). Last edit at 08/03/2018 03:09PM by Jsibal.

Do you have another sensor to cross check? I think it could be a sensor or transmitter issue. Does the TX show up always the same % value in pc (TX calibration screen) at powerup?

regards (EN) / Gruss (DE)

Rainer Vetter

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Posting and answering - please use a PC and a standard keyboard. Answer all questions fully, take the needed time, don't forget probably requested attachments.

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hi,

sorry for my late response! I simply made a new model and the error went away. Heli behaves perfectly normally now...more than 10 flights.

Well the issue has now come back. I just got a new Vbar Control touch so it is definitely not a transmitter issue. Could it be an issue with the Neo? Here is a link to the video to better explain: https://youtu.be/rJTZJIYaveo

This can tilt sometimes forwards or backwards in the same manner. It does not seem like a sensor problem. Do let me know if this behavior is normal or not.

Thanks



Edited 1 time(s). Last edit at 05/09/2019 11:07PM by Jsibal.

Could you please check/zero trim flight values for a cross check?

regards (EN) / Gruss (DE)

Rainer Vetter

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Posting and answering - please use a PC and a standard keyboard. Answer all questions fully, take the needed time, don't forget probably requested attachments.

Für Posts und Antworten bitte einen PC und eine richtige Taststaur benutzen sowie alle Fragen vollständig abarbeiten. Nehmt Euch Zeit, beantwortet Rückfragen in Ruhe und vollständig.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Für Einzelkommunikation bitte ausschließlich Email verwenden! - PN, Messenger, Chat usw. werden nicht bearbeitet.
For single user communication please send a email only! PM, Messenger, Chat etc. won't be read.