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bradh1963 · 02-24-2010, 09:53 PM

Hello fellow chopper pilots.
I bought a TZ-V2 for my son, we put it together, flew it, and it flew very well. Unfortunatley it came to grief due to a bad auto.
So i bought another one and put it together and it had a really bad tail vibration. ( Vibrated vertically to the point where it would of shaken to pieces). I bought a dial indicator for $100 and checked the fan hub runout. It was out a mile or two so i replaced it with a Gohbee fan and hub. It still vibrated just the same.
Then i replaced the entire tail assembly with a Gohbee metal unit. It still vibrated.
Then i replaced the main gear because that was out a couple of miles as well. Still had the same vibration.

So i checked the runout on the belt drive gear and guess what, that was out so bad that the belt was moving up and down about 3mm.

So i replaced that with a Raptor Gear. Yet it still vibrated just the same. By this stage i was beginning to pull my hair out but i wasnt going to let this beat me.

Obviously i had checked blade balance and all the other obvious.
Ok, what do i do now. I decided to take the head apart as the unit comes preassembled and i found that whoever put it together had left out the two internal washers in the one of the blade grips. I replaced these with spares from the first TZ and now it flys as smooth as silk.
Hope this post may help someone else in the same boat.

Cheers Fellas
Brad
W.A.R.M.S Western Australia

SweetF · 02-25-2010, 08:59 AM

Thanks for the post .
I am new to helie's and this kind of information is Great .. Hope to have my Frenzy going soon .

SweetF · 02-25-2010, 09:00 AM

Thanks for the post .
I am new to helie's and this kind of information is Great .. Hope to have my Frenzy going soon .
Thanks
Fred

BC · 02-25-2010, 10:28 AM

Wow sorry to hear about your solving the issue the hard way. Im sure you found there was no threadlock on the screws either, if not do it too!
I wish they made this kit as a "kit".

sniper_iron_man · 03-01-2010, 06:34 PM

damn...well that sucks atleast you got rid of some of the vibs and the main one washers.

sonnyhad · 03-01-2010, 07:21 PM

yeah, at least you found it after all the struggle, and you didn't know you were going to heli mechanics school either did you!! LOL Thanks for posting the info though, I know it helped me!. I am about ready to fly mine, have to get the gov adjusted and should be ready to go!
Thanks again.

02-24-2010, 09:53 PM	#1 (permalink)
bradh1963 Registered Users Join Date: Feb 2008	Crazy Vibration in the TZ-V2 Hello fellow chopper pilots. I bought a TZ-V2 for my son, we put it together, flew it, and it flew very well. Unfortunatley it came to grief due to a bad auto. So i bought another one and put it together and it had a really bad tail vibration. ( Vibrated vertically to the point where it would of shaken to pieces). I bought a dial indicator for $100 and checked the fan hub runout. It was out a mile or two so i replaced it with a Gohbee fan and hub. It still vibrated just the same. Then i replaced the entire tail assembly with a Gohbee metal unit. It still vibrated. Then i replaced the main gear because that was out a couple of miles as well. Still had the same vibration. So i checked the runout on the belt drive gear and guess what, that was out so bad that the belt was moving up and down about 3mm. So i replaced that with a Raptor Gear. Yet it still vibrated just the same. By this stage i was beginning to pull my hair out but i wasnt going to let this beat me. Obviously i had checked blade balance and all the other obvious. Ok, what do i do now. I decided to take the head apart as the unit comes preassembled and i found that whoever put it together had left out the two internal washers in the one of the blade grips. I replaced these with spares from the first TZ and now it flys as smooth as silk. Hope this post may help someone else in the same boat. Cheers Fellas Brad W.A.R.M.S Western Australia __________________ TDR Vbar, Logo600 Vbar, Goblin Vbar,

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02-25-2010, 08:59 AM	#2 (permalink)
SweetF Registered Users Join Date: Dec 2006	Thanks for the post . I am new to helie's and this kind of information is Great .. Hope to have my Frenzy going soon .

02-25-2010, 09:00 AM	#3 (permalink)
SweetF Registered Users Join Date: Dec 2006	Thanks for the post . I am new to helie's and this kind of information is Great .. Hope to have my Frenzy going soon . Thanks Fred

02-25-2010, 10:28 AM	#4 (permalink)
BC Registered Users My HF Map location Join Date: Oct 2004	Wow sorry to hear about your solving the issue the hard way. Im sure you found there was no threadlock on the screws either, if not do it too! I wish they made this kit as a "kit".

03-01-2010, 06:34 PM	#5 (permalink)
sniper_iron_man Registered Users Join Date: Feb 2008	damn...well that sucks atleast you got rid of some of the vibs and the main one washers.

03-01-2010, 07:21 PM	#6 (permalink)
sonnyhad Registered Users Join Date: Oct 2008	yeah, at least you found it after all the struggle, and you didn't know you were going to heli mechanics school either did you!! LOL Thanks for posting the info though, I know it helped me!. I am about ready to fly mine, have to get the gov adjusted and should be ready to go! Thanks again.

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