Couple issues

[flyingkiwi]

Firstly I want to say I am loving my NX4, I have been thrashing it for a few months now and had no complaints.

Now, all of a sudden I have gone through 2x tail hubs in the matter of 1 week. The first one resulted in some major damage and the second was not so bad, except the grip and blade flying pasted my head and hitting a friends gazebo behind me!! Unfortunately I have no idea what "run" the hubs were (how old) but the second was from an X5 part bag.

The other problem, and I think I am alone on this, is twice my boom has torn apart in excactly the same spot. Right where the horizontal fin/boom clamp attach. The first time I figured I must have tightened to boom clamp to hard so was careful not to repeat the same mistake, but it happened again. I'm using the pre assembled boom/TT's. Any ideas? Luckily both times I got the heli down in one piece, well 2 if you count the broken boom.

One other thing is the tiny screws keep coming out of the boom braces and I have tried everything to stop it, lock tight, glue etc and my last solution is to use short pieces of piano wire through the holes and bending them. This works great but isn't that pretty:-) I could use longer screws with lock nuts, but the size is a challenge.

I thought maybe all the above issues could be due to excessive vibes, but looking it the vertical fin in a hover it is solid, and the whole heli looks fine.

Anyway just a bit nervous about fly it at the moment.

[Blade3d]

First am sure this will be IGNORED but here goes. after flying my NX4 I noticed it was not as smooth as my 600 then reading all to post I can only conclude it has Vibes, where are the vibes coming from ? After observing the bell relative to the pinion it has a bad Wobble that will give you Vibes for sure. I think Guai needs to look into this ( Tail boom / Clutch / Slider /
Screws coming loose .
All that equals VIBES

[tonyboy]

Wow! I just maiden my bird yesterday..break-in process for motor and hover only. I hope it all goes well later.
As for your boom, I had a friend who had the same thing happen to his bird(Trex 600). The rubber grommet that holds the bearing came off and the bearing in time cut the boom from the inside out.

[Bigugly]

Originally Posted by flyingkiwi

One other thing is the tiny screws keep coming out of the boom braces and I have tried everything to stop it, lock tight, glue etc and my last solution is to use short pieces of piano wire through the holes and bending them. This works great but isn't that pretty:-) I could use longer screws with lock nuts, but the size is a challenge.

.

try putting a piece of heat shrink over the boom support where the screw is... that should keep it from backing out.

[dodgeboy]

Originally Posted by Blade3d

First am sure this will be IGNORED but here goes. after flying my NX4 I noticed it was not as smooth as my 600 then reading all to post I can only conclude it has Vibes, where are the vibes coming from ? After observing the bell relative to the pinion it has a bad Wobble that will give you Vibes for sure. I think Guai needs to look into this ( Tail boom / Clutch / Slider /
Screws coming loose .
All that equals VIBES

+1 all sounds like vibe issues.

[flyingkiwi]

Originally Posted by dodgeboy

+1 all sounds like vibe issues.

So are you agreeing its a Gaui issue, or do you have some thoughts on areas I can look at.
Thanks bigugly:-) for the heatshrink idea, simple but brilliant!

[Todd Moriarty]

Check your bearings first. I had the main bearings get notchy, and the Heli was all over the place with vibes. It could be clutch alignment, but I haven't had issues with that.

[u8at711]

Torque tube gears too tight could be the vibe., check the tail blades on the hub for balance.

I put mine in the ground, dumb thumb style last weekend.
At first look it wasn't too bad, after looking things over it's really bad, broke the clutch bell, all servo arms need replaced,
Going to do a semi-rekit. Just can't get enough of flying this thing.