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Old 10-11-2018, 11:30 PM   #2 (permalink)
bmlasater
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Join Date: Jun 2006
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Hi,

Almost certainly vibration...I havea number of these helis, and have discovered the new fbl unit is more suceptible to vibration issues than the older Beast...To that point, I have replaced rwo of the new units with older 7200 units, chang3d nothing else, and issue went away..
If you are a brave soul, dynamically balance the tail and main rotors by spooling up in hand...I know, very dangerous...but a better flying heli always worth it..do tail first, then main blades...small pieces of transparent tape on bottom of blades works wwll to balance...
In addition, be sure the tr belt is correctly tensioned...too tight or loose causes vibes as well....

Good luck!

John.
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