i just spooled up my trusty old t-rex 600 which i had since mid 2007 All parts still original except esc, the t-rex 600 V2 it was called with the gunmetal green head (with plastic grips)
This heli has gotten all sentimental with me simply because it's been with me for so many years (granted i don't push the envelope lol...) not ever lol... Just some FFF is as far as extreme i'd go with it and even then it's far from top speed the way i fly.
Anyway just 15 minutes ago i spooled up and after about 60-65%
throttle the tail jerked viscously or should i say noticably enough to give me a fright to the right in a split second,but just a little (the skids did not move) and the motor sound pitch changed with the jerk, but it continued to spool up perfectly for the rest of the flight and all was normal.
This never happened to me before, does anyone have any ideas what it might've been and should i be worried ?