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NX7 Discussion and support of the Gaui NX7


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Old 11-11-2016, 11:54 PM   #1 (permalink)
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Default Switched to NEO on my NX7, having issues

I upgraded my NX7 to NEO AND Vcontrol. Before I had a vbar silverline and a DX9 transmitter and it was flying good. I have a 91SRX. I have 2 other electric helis on NEO and vcontrol and I've never been happier with those models.

I flew my 2 year old NX7 today with the NEO for the first time and it flew like crap. I was having governor issues which got fixed somewhat by increasing min throttle from 20 to 40. My main concern was the tail. The tail was very loose in a hover and would kick slowly every once in awhile. But not rhymically. The tail gain was cranked up another 10 points to 95 which was quite high. THAT DIDNT SOLVE IT.

I have an external sensor on the back of the heli which worked great with my old silverline. I also have 2 layers of tape under the NEO.

Anybody have some tips as far as mounting the NEO or tuning?

I can post some logs tomorrow and get more info.
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Old 11-12-2016, 10:31 AM   #2 (permalink)
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Check the neo case, if the tabs are cracked the tail will wander and kick and the cyclic will drift (if it's really broken). I wouldn't expect that to matter if you're using the external sensor, though. Not sure which one it prefers if you have that hooked up.

I've always stuck the neos down with a single layer of tape.
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Old 11-12-2016, 10:43 AM   #3 (permalink)
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Ok, I'll check the tabs.

The logs show it detects the external sensor when I turn it on. Nothing during the flight whether it's using it or not. I'll do some more research about the external sensor.

It seemed to me when I went into fast forward flight, the tail felt fine. Soon as I would come back into hover, the tail almost had a mind of its own.
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Old 11-13-2016, 10:54 PM   #4 (permalink)
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I had a neo on mine at one time and never could get it flying right. Also had the external sensor but it was still too touchy. Switched it out for a 3digi and all is well.

Sent from my SM-N910V using Tapatalk
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Old 11-13-2016, 11:00 PM   #5 (permalink)
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I tried flying my n7 with a Neo and an external sensor. I had the same kind of issues. I got rid of the external sensor and the problems went away. Try flying it without the external sensor. You don't need it, the Neo works better on the internal sensors.
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Old 11-14-2016, 10:44 AM   #6 (permalink)
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Quote:
Originally Posted by dbcaster View Post
I tried flying my n7 with a Neo and an external sensor. I had the same kind of issues. I got rid of the external sensor and the problems went away. Try flying it without the external sensor. You don't need it, the Neo works better on the internal sensors.
Wow, I would not have that of this. Will definitely give it a shot when I get some days off.
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Old 11-14-2016, 10:49 AM   #7 (permalink)
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Go to one layer of tape. Too much tape can cause a sensor to wobble creating more issues.

I run the NEO on a gas heli, the Neo sensor is more immune to vibration than the silverline.
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Old 11-15-2016, 01:57 AM   #8 (permalink)
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Quote:
Originally Posted by fastflyer20 View Post
Go to one layer of tape. Too much tape can cause a sensor to wobble creating more issues.

I run the NEO on a gas heli, the Neo sensor is more immune to vibration than the silverline.
Great stuff guys thanks! The Nitro has been flying good till now and have had lots of ups and downs in the last 2 years. I will go step by step till the problem gets resolved.

Hopefully I'll fly it Wednesday to get it figured out.
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Old 11-16-2016, 05:17 PM   #9 (permalink)
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Quick Update,

I disconnected the external sensor and went to 1 layer of Mikado tape. The tail was much better but the heli wanted to start drifting to the right eventhough the head gain was in the 80s. I would put the heli in a hover and could see the disc starting to tilt to the right. I tried all different head gains with no luck.

2nd flight: I removed the Mikado tape and went to a thick stiff gel tape. The tail was still fine and the rotor drifting was less to the right but still easily noticeable. The logs on this flight showed lots of Extreme Vibration Levels unlike the other flights which only showed raised and high vibes.

3rd flight: I removed the thick gel tape and went to a thin gel tape. Tail was OK but the heli would drift right and left more noticeably. Basically it flew like crap.

I called it a day after that. Below are the logs.

Anybody suggest using a layer of tape, then a metal plate, and then another layer of tape that the gyro would sit on?

Any other ideas?
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Old 11-26-2016, 10:53 AM   #10 (permalink)
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Well, I decided to take my engine out to put in stainless steel bearings and discovered the piston trying rotates around piston and one of the o rings for my header had broke. Maybe this will sort out the engine vibes.

Plus I'm gonna finally break down and balance the clutch stack!
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Old 11-27-2016, 09:29 PM   #11 (permalink)
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Did you balance the clutch fan and Main gear? Mine it has Neo too. And i have a drift to left. So today i manage to balance and now i have to try again and see how it goes.

The balance was very bad out from the box.
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Old 11-28-2016, 11:15 AM   #12 (permalink)
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I have the engine all torn apart with the new bearings installed. I haven't balanced anything yet or measured run out. I have a dial indicator arriving on tuesday that I ordered from Amazon to measure the run out.

I also have a small aluminum plate that I will use as a gyro mounting plate. Its about 5 mm thick and is the same dimension as the NEO.
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Old 11-29-2016, 08:30 AM   #13 (permalink)
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well i balanced everything and now its ok, gaui come on!, this things still cant be happen with the new kits!
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Old 11-29-2016, 09:21 AM   #14 (permalink)
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Lorenb,

So is your heli flying good now and the NEO behaving?
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Old 11-29-2016, 09:24 AM   #15 (permalink)
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yes its flying good now, only have to get the motor fine tuned, only issue is the neo gov, i have no patience to tuning haha, i will try to put the cgy 750 but only the gov.-
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Old 11-29-2016, 11:38 AM   #16 (permalink)
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Yeah, the governor tuning is difficult! At least it is with my YS engine.

That's great to hear your NEO is working good now, it gives me hope
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Old 11-30-2016, 07:23 AM   #17 (permalink)
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i saw this in the gaui website

http://www.gaui.com.tw/product/nx7-u...e-fan_for-nx7/

it seems to be an all in one
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Old 12-01-2016, 12:40 AM   #18 (permalink)
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That's cool, I dremeled the crap out of the fan and hub to make it balance today.

That upgrade looks worthy.
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Old 12-10-2016, 11:13 AM   #19 (permalink)
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Flew my NX7 with the new balanced clutch stack yesterday. I also put an aluminum plate under the NEO and did some other preventive maintenance items.

First 2 flights much better and the heli was locked in. The stupid YS ENGINE was also running the best it's ever had with new stainless steel bearings. On 2nd flight I got up high to test the rescue mode and it then went into a death spiral. Luckily I had just enough altitude to recover and then shat myself.

3rd flight was not good, the heli decided to pitch backwards continuously which was controllable. More pronounced at higher rpms. I decided to call it a day.

I'm now going to use the Milton mod since my buddy has some Zeal tape. I'm also going to wrap the NEO tightly with packaging tape even though the tabs are still intact.

If that still doesn't work, then I'm going to relocate the NEO to the back of the heli since my old vbar silver line sensor worked great back there.
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Old 12-11-2016, 12:03 AM   #20 (permalink)
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Update: I took my NEO off the aluminum plate which resulted in a broke tab but shined a flash light around the case and saw a small line which I noticed before. I thought the line was a part of a molding process since the same line was on the other side a couple weeks ago. Well, I bent the NEO a little to see if it was a crack and sure enough it was.

They really need to do something about these NEO cases. I'm pretty sure that is the culprit now but I'm glad I balanced everything anyways.
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