FES X5 CNC main rotor yoke doesn't fit - HeliFreak
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Old 02-12-2012, 05:09 PM   #1 (permalink)
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Default FES X5 CNC main rotor yoke doesn't fit

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.
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Old 02-12-2012, 05:27 PM   #2 (permalink)
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No. If anything mine was loose and I had to really tighten the bolt to get the head tight.


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Old 02-12-2012, 05:44 PM   #3 (permalink)
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Thanks!
At least I know tolerances are not on my side with this kit.
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Old 02-12-2012, 07:01 PM   #4 (permalink)
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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.
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Old 02-12-2012, 07:21 PM   #5 (permalink)
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mine is very tight.....tighter than i would like but its ok i am sure
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Old 02-12-2012, 07:59 PM   #6 (permalink)
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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

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Old 02-13-2012, 03:39 AM   #7 (permalink)
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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.
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Old 02-13-2012, 07:06 AM   #8 (permalink)
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One of mine has been quite tight but flies perfect.


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Old 02-13-2012, 12:54 PM   #9 (permalink)
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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.
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Old 02-13-2012, 01:49 PM   #10 (permalink)
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Quote:
Originally Posted by helidude71 View Post
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.
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Old 02-13-2012, 02:51 PM   #11 (permalink)
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I do hope so Danny.
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Old 02-14-2012, 01:56 AM   #12 (permalink)
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Quote:
Originally Posted by helidude71 View Post
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.
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Old 02-14-2012, 11:25 AM   #13 (permalink)
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Quote:
Originally Posted by Harrow View Post
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.
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Old 02-14-2012, 04:19 PM   #14 (permalink)
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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.
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Old 02-14-2012, 04:21 PM   #15 (permalink)
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Quote:
Originally Posted by Harrow View Post
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.
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Futaba T7C (I admit, also a Spektrum DX8 and some planks.) ;-)
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Old 02-15-2012, 06:16 AM   #16 (permalink)
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Quote:
Originally Posted by helidude71 View Post
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!!
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Old 02-15-2012, 06:41 PM   #17 (permalink)
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The X5 FES I built the head was darn near press fit.
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Old 02-16-2012, 01:04 PM   #18 (permalink)
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Quote:
Originally Posted by rotaryguy View Post
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?
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Old 02-16-2012, 01:48 PM   #19 (permalink)
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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.
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Old 02-16-2012, 02:29 PM   #20 (permalink)
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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?
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