A Shakie situation.

[cml001]

What gyro? That seems high to me.. But all are different.. U have checked mechanical? I had a blowout issue with my 450 and was blaming the gyro.. Turned out my mechanical 90 was way off & I had a slight bend in the pushrod... Check ur rate mode for drift.. Check for slop.. Check for tight but smooth control throws.

[DOG]

Well I'm using the AR7200BX FBL unit. All the settings and #'s has been the same since day one. I'm just going to take her apart and go through everything. Tail shaft, when i connected to my cordless drill at high speed, the shaft shown no sign of wiggle. I tighten the belt and tested it by holding the tail blades and try spinning the main gear to feel slippage, nothing. I change ESC just for fun and nothing. I have no idea but to start over and go through it all and try any suggestion that the members might come up with.

[Lee]

It was difficult to see what was happening in the videos, as it was very blurred.
But in the second video, it looked like the tail was flexing and the frame wasn't moving.
Check for damage to the root of the boom, where it goes into the boom block.
Or the boom supports.

[DOG]

Sorry Lee and everyone for posting bad video. It's time for a new camera. This evening or early morning, I'll start disassembling her and hope to get to the bottom of this. I will checked the boom,block and support and will post detail of my findings. No mission impossible!

[DOG]

I installed a new boom,belt and tail shaft. checked for slop in mechanical, even gave her a beer and Still shes' got the shakes . The only thing i didn't change was the bearings on the tail end. That's probably what ails her. I'll wait to order the Tail Assembly upgrade for her. Bearings are included in the kit, Hope that works. Can the AR7200BX be going bad? Just a thought. At least i have the 450 to toss around this weekend .

Have a safe and wonderful Memorial Weekend everyone!!!!

[cml001]

Did u try tuning the pot gain on the top of the beastx down a hair or reduce the gyro gain in the Tx?

[DOG]

No, i haven't tried either one yet since i change the timing from 6 degrees to 18 degrees on the Yep 60. Now since i change the timing to 6 degrees and the PWM frequency from 10Hz to 8Hz. Do i also have to change the P gain and the I gain in the ESC? I have them set at P/0.9 & I/0.5 How about the cut off voltage? I'm so confused. Help please, I'm running out of hair to pull out, Lol I think.

[cml001]

Y did u up the timing?.. This is a setting issue somewhere.. I'm not familiar with a Yep ESC.. But on my castle I have my timing at 12.. It's good.. I'd go back to my previous settings & start from there.

[DOG]

Well according to the specs, the timing on that motor is 5 degrees/ 8Hz. On my Yep, there's no 5 degrees so I rounded up, like it was suggested to me, to 6 degrees. They read: 0/6/12/18/24/30 on the timing. I run 18 degrees on my 450/3s=3850KV. This motor is 6s/1800KV for the Gaui. I'll just keep knick picking away at the bird.

[cml001]

Hummm ... Wish I could be of more help.

[DOG]

That's OK cml001. Maybe some other members will be able to put in their suggestion. Thanks for your help..... Squirrel.

[murankar]

To be honest I don't think its a setting. He bhas been on the same setup for awhile now. Nothing g changed since. This leads me to thinking mechanical.

This will not rule out progression. If his skills increased over his ability to tune. With that I feel its mechanical. I could be wrong.

[cml001]

Lol

[Derek]

I have to agree with you, Matthias! I'm thinking the issue is mechanical, too. I'm thinking that either the belt has stretched and needs to be adjusted or replaced or perhaps the bearings in the tail have gone bad. I've had both troubles with the belt drive on my 500. Ken was kind enough to send me some metal tail rotors with bearings, twice, over a year ago and that solved a lot of the troubles that my sudden heli personality change. Adjusting the belt tension or replacing the tail belt, from time to time, also helps keep the tail solid.

I guess the bottom line, at least with my 500, is "good bearings and a good tail belt makes for a happy heli".

[DOG]

You are absolutely right Uri on the settings. My ability did improved some what but my gaui was doing fine before that. I haven't touch the settings from the beginning. If it's mechanical, the belt isn't stretched, I checked with new one. I'm just going to break down and by that upgrade for the tail assembly. I really don't care for the plastic tail assembly that comes with the X3. The mechanical ability to tune like Uri mention is probably right. I really don't know much about tuning. I try to keep it plain and simple. The way the 450 and X3 are set up is basically the same beside HS, Motor " 450-3s=3800Kv/X3-6s=1800Kv.

[murankar]

I really can't pin it to the rear tail box. What I can say the bearings could be worn, pitch slider worn or dirty, blade grip bearings. In some cases the tail servo could be a miss. Even the push rod running in the support could cause this. I am still going to say check the thrust bearings in the tail.

[DOG]

Well everyone, I'm still baffled with this tail. I have change; Belt,tail shaft, tail assembly & bearings, i even try switching AR but still NOTHING. The only thing i didn't change was the tail slider " No need too" We are going to have some rain this week here in FLA so I'm going to take her all apart and start over or just say the hell with it and by another Gaui X3 and keep this one for parts. That won't solve the problem I'm having. I need to know so if this happens again, i can fix it. There is 2 belt guides inside the tail box that guides the belt straight to the main gear. I thinking that there is dirt caught in the belt guide and that is making it not run smoothly. If anyone has any other ideas please throw it at me because I'm clueless right know and i ran out of hair to pull! Have a good day!

[Derek]

I forget what its called but on a belt drive tail there is a spindle like thing in the tail boom case. Eventually those do wear out. Maybe replacing that will help. I've had to replace that on my 500 before

[DOG]

What's up Derek. Well i replaced the whole tail assembly with a new one. I didn't change too the CNC tail assembly kit because i want to find out what's wrong first before spending more money then i have too. I went with the plastic stock tail assembly kit hoping where the bearings sit might off been worn out. Plastics and high rpm and heat doesn't do well with plastic. I'm running out of ideas on what to do. I'm glad my 450 is flying well. I at least have 1 bird to fly while trying to figure out this headache on the Gaui.

[DOG]

Well everyone, I like to start off by saying THANK YOU to all the members for their help. I finally got the X3 back to it's original way she was. Spending all morning changing, switching and replacing anything and everything that everyone suggested and I thought of that might be wrong with it and after about 4 hours, Nothing! My last choice was to put the old motor back on and give that a try. Never even cross my mine but the Gaui is back up and running marvelous. I'm not sure what was wrong with the new motor to make my heli act that way but I'm just glad that the X3 is up and running opps flying . Thanks members!!!