Model Forum / Radio Controlled / Helicopters / May 2004

Having a bit of a problem with the occasional right turn- can anyone help?

When I do figure 8's-- I take off with the heli pointing away from me, turn
90° to the left and climbout.  During the first turn, to the right, the
problem occurs sometimes- as if the tail is hunting- sometimes quite
violently.  As I continue the figure 8, I overfly the starting point and
make a left turn without any difficulties.
When I do a proper right hand circuit, that is 4 right turns- I can
experience the problem several times.

I find that when I am flying very fast and turn the heli by banking and
using elevator the problem is not apparent, nor is it apparent when I fly
very slowly and turn using rudder only.

I had the gain originally at 70%, and have tried resetting it to 60%, but
the problem is still there. I only fly using ACVS (Headling lock) mode.

Below are my gyro settings- I'd appreciate if you could scan through them
and let me know if there is anything obvious that I should change.

     Futaba GY 502 Settings
     GDir             REV
     G:1A 100%
     ACGA 100%
     NCGA 120%
     D1IA 0%
     DIDA 0%
     Trk 0%
     Mode                CMT
     Frm                High
     AVCS 60%
     LmtA 116%
     LmtB 130%

Regards

Gordon Dunn