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Title: Brazilian (Chinese) Heli breaking up! Post by: ujjwaana on February 24, 2012, 10:44:52 PM Looks like a badly build RC Heli... but its real!!
http://www.ndtv.com/video/player/news/rescue-helicopter-falls-apart-during-landing-in-brazil/224651?hp Title: Re: Brazilian (Chinese) Heli breaking up! Post by: RotorZone on February 25, 2012, 01:37:26 AM Ground resonance doesn't necessarily mean a badly built heli. I have also experienced it on hard floors on model helis. Using a mat got rid of the resonance.
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