Hi. I have trex 700N with spirit 2 fbl. Untill now everythink was the heli was flying nice and smoothe. Yesterday without any reason during take off the heli tip over. Can somebody or the administrator give me any explanation or some tips what i must check on the heli so not to happen this again? Just to say that during take of i didnt touch at all elevator/eleron stick. Thanks

Hello,

that is very sad.

Do you remember if swashplate was really level when taking off?
This is very important.

If sticks were really not touched at all once motor was running and model was not moving during initialization then the only possibility is that something is getting really very bad with the mechanics or motor. For example some bearing.
This can be visible on spectrum analysis tool.

This is the most common issue when something is happening on its own, because each flight these parts are under big stress.

_________________
Spirit System developer

Hi. Thanks for your response. I will make vibration analysis and i will come back. Thanks

I had a tip over with a T-rex 700N recently. Turned out to be a cyclic servo wire chaffing on the clutch bell. Luckily it did it on lift off and not a moment later