computerbob
Senior Heliman
Location: Westchester County, New York
| Bill ... (Continuing from previous post.)
Matt's belt drive procedure is the same as the stock tail. The only difference is a slightly higher tail rpm with the 28-tooth pulley. However, it sounds to me like you have no tail thrust and/or you don't have even throw from the mechanical center.
Just a recheck while we are at it: On the 401 you have it in digital (DS) mode, delay set to zero, and limit at 100%? And the long metal TR pushrod is not binding in the guides?
Why not switch to non-heading hold, connect the battery (no throttle and watch out not to bump throttle stick or use a flight battery pack), and manually push the tail with your hand, back and forth and notice how the pushrod, bell crank and tail blades react: Make sure there is equal travel of TR pushrod and bellcrank. And make sure that if you move the nose of the heli to the right that the gyro/servo output a left tail rotor command (pushrod moves outwards to tail) ... and visa-versa with a nose left.
Next, you can lift off in non-HH mode, go easy and slowly with throttle, because as you lift off the heli's tail will swing. Add the appropriate rudder corrections to keep the tail straight in a hover and remember which rudder input was needed. Land, then mechanically change the pitch of the blades by adjusting the spider collar. If you had to give left rudder you move the collar inward on push/pull rod. If it needed right rudder, move collar out. (I hope I got that direction right?) Keep adjusting until tail stays still, or close to it, in hover. Now you can go back to heading hold and know that your tail is all trimmed out.
Once again ... good luck.
-Bob-
PS: Did your Corona fly OK with regular gyro and say a HS-81 servo? |
