450 shakes

[Sparse]

so i rebuilt the 450 and upon spool up the heli has got the shake running through it what do i need to do to fix it. or is it normal ?

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ok i took the blades off and spooled it up just to see and the heli stayed put no shakes, so is this a blade tracking issue, balade pitch issue or what ?

 

[treff]

Hi Sparse, wonder if you checked your feathering shaft, even a slight bend will make your heli unstable. Also check main shaft for same reason and make sure
head bolt is not loose. Hope this helps. Cheers

 

[Sparse]

there both brand new nothing is loose as far as i can tell. looks like another day i will be going to the hobby store.

 

[EyeStation]

Blade tracking, Blade pitch or even blade balance. It could still be shaking without the blades, but the blades might be exaggerating the vibes. Maybe start with the blade balance, toss em back on marking one blade and grip. Then do a visual on the tracking. Keeping the marked blade and grip as a standard, only make adjustments to the non-marked side.
Since getting a digital pitch gauge myself, I have measured the 0 pitch on each blade, then rotated the head 180° and measure it again on both blades. If I see measurement imbalance, I will start with link adjustments to get the blades equal, (as best I can).

 

[Sparse]

Hi Sparse, wonder if you checked your feathering shaft, even a slight bend will make your heli unstable. Also check main shaft for same reason and make sure
head bolt is not loose. Hope this helps. Cheers

the feathering shaft was not fully tightened. you were right thanks.

 

[Derek]

another possibility could be that the blades just weren't entirely straight. I had the same issue with my 500, several months ago. I got the helicopter all plugged in and ready to go...started to spool up and it would shake violently, so I backed off. Scratched my head a bit and tried again. It began to shake again. So, I shut it off and put it away. I should have just continued with the spool up. Even though the blades looked straight, to my untrained eye, they probably weren't. I say that because on the very next hover attempt, the helicopter shook again but I continued with the spool up, hoping that centrifugal force would straighten the blades so that they were "in-line". I gave more throttle and the shaking stopped. The shaking stopped because the centrifugal force got the blades "in-line" with each other.

I'm not saying that this will solve your problem, but it's a possibility.