NX7 Vibration

[AlarmedBread]

I haven't had any vibration issues, heli flies great. Not trying to put anyone off the heli, it's just what you are in for which I was made aware of before choosing to purchase one. It's a nice machine and puts a smile on my face every time I fly.


The only minor concerns to address when building for me were-

The skids should only use one grub screw front and back

U shape engine mount should have washers between it and the engine or it will snap eventually

Longer engine mount the bolts needed with the side frame reinforcement

Crown gears need constant attention (check every flight)

the clutch bell will rub during hard aileron maneuvers

[mikican]

Hi everyone
I have a vibrating problem with gaui nx7 since last month and still not settled.
I try to set shatf clutchs but its still vibrating..Can u guys check out my video(below) and do ur comments,please? Thank u..

[Eury]

All I see is that fast nodding on pitch axis, looks like gain set too high to me, but it's hard to tell from a video.


Sent from my iPhone using Tapatalk

[rctintin]

Originally Posted by Justin Pucci

Lou, my friend Rob Bingham (rctintin) has done a few videos on how to balance a nitro. I'll see if I can find the links to them. I'll also put it on the list for a tech tip.

Here you go Justin, and for anyone else, I hope this helps. (sorry for the quiet talking, my kids were asleep next door lol)

How to balance a nitro Heli clutch and hub (1 min 49 sec)

[rctintin]

Also, here is a vid on how to get your clutch stack inline before you bolt it in place. Hope this may help....

How to line up a clutch stack on a nitro Helicopter (1 min 21 sec)

[Justin Pucci]

Woot!!! Thank you, Rob!

[bgymr]

In this thread I read that it's better to have the white gears. What gear were you talking about?

And when you say to check the crown gears, what would I be looking for?

[marndra]

Originally Posted by bgymr

In this thread I read that it's better to have the white gears. What gear were you talking about?

And when you say to check the crown gears, what would I be looking for?

The white gears are the new ones, means they are EXACT the same as before, but only with the warranty they have no bubbles inside.

Unfortunately the Crown gear is the Bottleneck of the NX7/X7, it can strip very fast.

Check it's play and vertical position. If this is not 100% ok it can direcly crack in the first flight.

I stripped several Crown Gears on my NX7 and X7 by hard flying, also crashed, because of this.

But if everthing is fine and you found the right shims for adjustment, then they hold well.

[bgymr]

Thanks for the reply. But what gears are offered in white, all of them?

[marndra]

Originally Posted by bgymr

Thanks for the reply. But what gears are offered in white, all of them?

What I know the tail Bevel gears and the crown Gear. (Both for NX7 and X7)
For the NX7 Main Gear I know only about a black one. It's veeery strong !
For the X7 the Main Gear is still white.