Bit of an update from my last crash on Friday. Was flying the last pack late afternoon (too late as it turns out), lost orientation and crash it. This rebuild hasn't been as straight forward as the last 2. Had it all back up and running for Saturday morning. Complete new tail, blades, both shafts in the head, blade grips plus a few other bits.
Went to fly saturday morning and there is a vibration through the head that only comes in just as you take off then the gyro gets all confused and the tail goes mad. Back to the workbench.
Put a complete new head on it off the other GT kit I bought and it still had the same problem. Replaced the main gear/autorotation gear same problem.
Ok, so the only other thing that's left that moves is the two bearings in the upper and lower bearing block for the main shaft. Replaced both of these (blocks and bearings swapped) and put the original head back on. Vibration gone. So it looks like a bearing has bent or the block is bent.
Forgot to disconnect one of the servoes (HXT900's) when I pulled the head up at one stage and striped a servo. No problems, got a spare one of those. Went to test for the vibration for the last time and the tail serveo has failed. It's dead. Luckly it happened on the ground. It's a goteck ds9257 from hobbyking. Won't be buying one of those again. Lasted about 45 flights.
So now i'm grounded untill I can get a decent tail servo. Anyone have any good suggestions?