ORIGINAL: rzarikian
if its a high frequency vibration then its probably coming from the tail blades, check the tail blades for balance if you can, also make sure your belt is not too loose and..... I guess that's it. check that to see if it helps. If you're not sure is a tail issue the you could have a bent head (you only need to replace the head housing in ths case which is only 30$ not the complete head) and also make sure your flybars are balanced and that the blades are tracking correctly
One thing you can do is remove the main blades and tail blades and spin up the heli, if its vibrating then balance the flybar. once its not vibrating then put on the tail blade, if it starts vibrating then check your tailblades for problems, and finally put on the main blades and repeat, kind of a process of elimination
Well I did check everything you mentioned at least once and so far I have not found a thing. I appreciate the suggestion but I won't be spinning up the heli with out main or tail blades I have heard that is a bad idea and don't plan on testing it. With the way I balanced everything and checked everything it would not do much good anyway.
ORIGINAL: Missileman
And you should have way more than 1600 rpms with a 4s and 11T, check your settings.
ORIGINAL: BryFlyGuy67
A 4S pack on a stock TREX 450 V2 with an 11T pinion should net you ~ 3400 RPM.
How do you know your HS is 1600?
What motor are you using? If you are wanting to run 4S, you should get a motor that was designed for it (lower kV rating). In addition, with 4S, you need to be running a separate BEC or purchase an ESC that can handle the additional voltage.
There is a lot of tweaking and configuration involved with converting to a 4S setup.
As to your high frequency vibration, where are you seeing it?
You are both correct I was not seeing the whole picture because my optical tach does not go to 3160 rpm but it would look like 1580 at half speed or I am seeing the blades every other rotation so it just looked like 1600+~-.
I am using the stock motor and ESC, I asked on another forum one day about using a 4s with the stock setup the answers I got said it should be ok to use a 4s I could not find anything from Align saying not to do it so I gave it a try, seems to be ok so far.
I am mostly seeing the vibration in the landing skid it kinda starts out in the head as the blades are spinning up then when I lift off the ground you can see it in the skid. This vibration has been there it was not as bad with a 3s pack but I suppose the higher RPM and a more powerful setup has made the problem more noticeable.