Tail Problem

[robpod]

Hi all,
I have maiden flight today.
I couldn't get the tail to be solid, no mater want gain I have stetted up, slow wiggle all the time.
I ended up with 104 gain seems to be best but still tail is not rock solid?
Do I have bad sensor?
Im on HV septum with savox SB-2272SG
Logs do not show anything unusual, no vibrations on live log with bluetooth module.
Any ideas?
( I have shortened the vbar sensor wier a bit, is that could affect the preformance?)
Rob

[AusAnt]

I don't know how bad yours is, but I had a minor slow wagging, say a couple of inches of movement at a pulse rate of about 1 or 2 per second. It didn't look like anything serious and was only obvious in hover.

I took main blades off, and took the tail hub off altogether. I spun up the heli and polished the tail shaft with silvo (I only had that, brasso would have been fine too) and got a really nice shine on the shaft. The pitch slider slid much more smoothly after that and the wag is all but gone.

I thought it felt smooth before I polished the shaft, but after I polished it I could really feel how much more silky it was.

Cheers,
Ant

[flymustangs]

I had a similar issue and found three different problems. One was the assembly of the forward tail drive gears. Mine were assembled so they allowed a little bit of play. The second was one of the bearings in the tail gear box wasn't seated properly so it allowed a bit of play in the aft tail drive gears. The third was some binding on the pitch slider as Ant found. When I fixed all of those the tail was solid.

[MrMel]

Check event log for VBar to see if it's glitches on the RPM channel.

[robpod]

Hi
Logs show no problem at all
Wil post them later
Tail shaft is reall polished, all moves so smoth,
Any other ideas, should i change vbar sensor?

Rob

[ola.c]

Originally Posted by robpod

Hi
Any other ideas, should i change vbar sensor?

Have you checked the thrust bearings so that you haven´t mounted them incorrect?

[robpod]

Thrust berings ware already installed
I will check them again
Do you have pic how they should be installed?

Rob

[ola.c]

You didn´t disassemble and apply Loctite?
From page 8 in the manual:

[robpod]

I did disassemble.
Forgot about it sorry.
Thrust bearings are ok.
I just noticed that when I turned head by hand I can hear very quiet click in the boom
When the shaft turns.
I will disassemble and double check .

[robpod]

Here is my log:

http://db.tt/npPapgCh

[matrosek]

Rob.Bring it to the field sat or sunday.We all will take a look at it

[robpod]

Maybe during the week
Im in PA sat and sun

[robpod]

I think i have found the problem
What do you think guys?





Sent from my iPad using Tapatalk HD

[Dr_K]

Probably......

Unless the half ring has split, degrease them and glue back on the bearing with epoxy (carefully).

I had one come apart when checking mine.

[Laughingstill]

That will do it!!

[robpod]

Confirmed!!!
I have been flying all day today.
Tail rock solid. :-)
Great heli.



Rob