skigolfmike
05-18-2008, 09:44 PM
I was flying the 550 tonight doing a little basic 3D. Flips, rolls, tic-tocs, plus some piros and some nice easy forward flight. All was well until I decided to step on the gas and go into fast forward flight. That started OK, then I made a high speed turn and put in some rudder to coordinate. That's when the tail went into a an oscillation and made a whup-whup-whup sound. As soon as I slowed down, the problem was gone.
I've rebuilt the tail on this bird and it's practically all new. Belt tension is good, actually pretty tight. You can shake the boom and not hear the belt hit the boom. I've currently have the Gaui CNC tail with the thrust bearings on and I'm running the 500mm RCP blades at 2300 rpm.
Current performance is pretty astounding. However, I'm reluctant to push the heli hard until I get this figured out.
I may have the gain on the gyro a little too high. It's OK when there's not much load on the tail, but it shows up big time in fast forward flight.
I've rebuilt the tail on this bird and it's practically all new. Belt tension is good, actually pretty tight. You can shake the boom and not hear the belt hit the boom. I've currently have the Gaui CNC tail with the thrust bearings on and I'm running the 500mm RCP blades at 2300 rpm.
Current performance is pretty astounding. However, I'm reluctant to push the heli hard until I get this figured out.
I may have the gain on the gyro a little too high. It's OK when there's not much load on the tail, but it shows up big time in fast forward flight.