vibration on E7

[joliecoeur13]

I finally got my E7 built with sk720 , the one small issue I'm having is a spike in my vibe log arround 400hz , does any one have clues to where that is from?
The kit has about 20 flights on it from previous owner ..

I have to say I'm very impresse how things fit in this kit and the quality of parts

[bmw576]

If the E7 is flying great I don’t know if I spend much time looking for something that may not be a problem. I will say I have no experience with the sk720. The only time I look at my flight log is when I know there is something wrong.

Some things to note.

Recently we have found that if the 42T pulley is not supported as you are tightening the through bolt, you will get vertical wobble. So.... as you are tightening the bolt make sure you are supporting the pulley but not putting any vertical load on the pulley.

The fact it's a use E7 I would look into all of the bearings and making sure they are greased.

There are a lot of helpful tips on this site. http://synergyrchelicopters.com/forum/index.php