Good day to you all .

I have purchased a ROC falcon rc helicopter and it has developed a problem whereby it takes off okay but when in the air it wobbles from side to side . I have tried altering the trim but this makes no difference at all. Please could anyone point me in the right direction as to what this problem may be

Many thanks
Andy<br type="_moz" />

That's a coaxial (two sets of main blades) ?

Most likely the ball joints and/or pivot on the flybar or upper blades are binding. Sometimes the plasic develops a burr or sometimes gunk just builds up over time. Inspect and clean (rubbing alcohol) and I scrape off the burrs with an exacto knife. There should be close to zero resistance in the flybar. Don't use 3in1 or wd40 up there, If you gotta lube, get some silicon spray and use just a tiny bit - I never had to lube mine up there.

The flybar might be bent.

If the blades are damaged, replace them.