FES X5 CNC main rotor yoke doesn't fit

[helidude71]

Is it normal that the main rotor yoke doesn't fit smooth onto the main shaft?
From my Align kits this just drops on it and bolt down.

I have to use some serious force to press mine onto the X5 shaft.
To be honest I think I f**cked up and wasted it.
When I run the motor the head stopper wobbles seriously.

[Chris Sexton]

No. If anything mine was loose and I had to really tighten the bolt to get the head tight.


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[helidude71]

Thanks!
At least I know tolerances are not on my side with this kit.

[s76 mech]

Mine was actually abit sloppy on the MS. I put it in a vise and crunched it down until it was nice and snug on the MS. No more slop. Its solid now, even after a crapload of flights.

[crf69]

mine is very tight.....tighter than i would like but its ok i am sure

[dannylightning]

Mine had a Burr in there, I got a new one and it fit good a friend had a 8mm drill bit and got the burr out of my origional head block,

the new one I got fit perfect

Sent from Samsung galaxy player, spelling and grammar might be worse than usual.....

[Harrow]

I had to push fairly hard down on mine to get it on. I guess I should have checked inside it for burrs, etc. It is nice and straight.

[torana74]

One of mine has been quite tight but flies perfect.


Vas

[helidude71]

Seems like Gaui still has a QC problem if you ask me.

Problems i have seen so far:

- Frame stiffener screws (the longer ones) don't fit. Holes inside the CNC servo mounts are not deep enough.
I can fix it by using the shorter stock screws.
- Tail slider sticky. I can fix it with a small washer.
- Yoke doesn't fit on main shaft. Needs replacement.
- Main gear has some up-down play, makes it wobble. Not sure how to fix this. (Needs shim I don't have I guess.)
(If I lift the main gear up you can see a small space above the C-clip.)

To be honest I'm sick of it, paid a lot of money and it's not a "pleasure to build" like everybody says.

Sorry for the rant.

[dannylightning]

Originally Posted by helidude71

Seems like Gaui still has a QC problem if you ask me.

Problems i have seen so far:

- Frame stiffener screws (the longer ones) don't fit. Holes inside the CNC servo mounts are not deep enough.
I can fix it by using the shorter stock screws.
- Tail slider sticky. I can fix it with a small washer.
- Yoke doesn't fit on main shaft. Needs replacement.
- Main gear has some up-down play, makes it wobble. Not sure how to fix this. (Needs shim I don't have I guess.)
(If I lift the main gear up you can see a small space above the C-clip.)

To be honest I'm sick of it, paid a lot of money and it's not a "pleasure to build" like everybody says.

Sorry for the rant.

yeah, i had a few issues, the head block having the burr inside was the only thing that was really a issue. but once you get it flying well the machine preforms.

[helidude71]

I do hope so Danny.

[Harrow]

Originally Posted by helidude71

Seems like Gaui still has a QC problem if you ask me.

To be honest I'm sick of it, paid a lot of money and it's not a "pleasure to build" like everybody says.

Sorry for the rant.

My only problem was missing 2 screws for mounting the servos. Not a big problem, but very frustrating when it stopped me from being able to maiden one week.

My only other scratch build was a HK450, so it has been a pleasure for me in comparison.

[dannylightning]

Originally Posted by Harrow

My only problem was missing 2 screws for mounting the servos. Not a big problem, but very frustrating when it stopped me from being able to maiden one week.

My only other scratch build was a HK450, so it has been a pleasure for me in comparison.

every kit i buy is missing screws, except for the gaui... that was nice for a change.

[helidude71]

My Align kits never missed a thing. Maybe I'm just lucky on that.
Now you say about screws, on the swash servo arms you need three M2 screws to fix the balls.
Two where the correct lenght but one is short.
I wonder why they don't put three M2 screws of the same lenght inside the kit?
It's always possible to make it a little shorter if needed, but not longer.

[helidude71]

Originally Posted by Harrow

My only problem was missing 2 screws for mounting the servos. Not a big problem, but very frustrating when it stopped me from being able to maiden one week.

My only other scratch build was a HK450, so it has been a pleasure for me in comparison.

You're right, I guess it's a pleasure when you come from a HK build.
It's all relative.

[Harrow]

Originally Posted by helidude71

My Align kits never missed a thing. Maybe I'm just lucky on that.
Now you say about screws, on the swash servo arms you need three M2 screws to fix the balls.
Two where the correct lenght but one is short.
I wonder why they don't put three M2 screws of the same lenght inside the kit?
It's always possible to make it a little shorter if needed, but not longer.

Oh yeah, I also had that problem. Downright annoying!!

[rotaryguy]

The X5 FES I built the head was darn near press fit.

[helidude71]

Originally Posted by rotaryguy

The X5 FES I built the head was darn near press fit.

In other words, you needed a lot of force to get it in place?
How did you manage?

[rotaryguy]

Very carefully
I polished down the upper portion of the mast with 600+, lined up the head and tapped it down with a plastic/hard rubber mallet after removing a bit of material from the main shaft.

[Harrow]

I'm wondering if the problem is due to paint inside the head? Perhaps they are machined correctly, but the paint makes it tight? Or are they anodised, and does that still add thickness?