Tuning Reference

Now you are ready to take off for tuning, have fun

 


If the gyro rudder base or swashplate base is not set, please refer to the Set Up Guide before going through this section

Caution : Prior to the first take off, final check the sensor direction by tilting the heli to all different direction, swashplate should try to level itself and slowly back to prependicular with the main shaft, check also the rudder sensor direction and all control mechanism.

Put the heli on a level plane field, only take off when the swashplate is back to horizontal. Do not give any cyclic input until skid off ground, tuning should be done in "Standard" mode and calibrate after changing any parameter

Pay attention to :

  • TAKE OFF AND LANDING
  • ADJUST THE TAIL ROTOR TO APPROXIMATELY MID-POINT
  • TAKE OFF ONLY AFTER HEAD SPEED IS STABLE
  • NEVER SWITCH BETWEEN "STANDARD" AND ANY "BEGINNER" MODE

Parameters to tune

For rudder, elevator and aileron, there are two basic parameters to fine tune. "P" and "I" value.

"P" controls how solid the stopping is, the higher value it is, the more solid stop will be

"I" can be interpreted as the gain of the control, rudder gain, etc...

Rudder

To achieve a solid stopping, increase the "Rudder P" value by 50 interval until a solid stop on pirouette, do high speed pirouette in a fast forward flight, raise "I" value by 50 until piro constantly

To achieve a solid pirouette stop, increase 'P' and reduce 'I' by a bit

Other alternatives are:

Increase "I" value till tail hunts, then lower it to a stable hold, then increase the "P" value to a solid stop

or

Do fast sideward flights to left and right, increase "I" value if the tail drifts, then increase "P" to achieve solid stop

Cyclic

Adjusting cyclic, start with elevator, do a few elevator input and rapidly centered, if the heli does not hold soon enough, increase "I" if the heli bounce back on centering, reduce "I" value.

Then increase "P" value to achieve a solid stop, if the elevator oscillates, lower both a bit until steady

Now, do a straight fast forward flight, if the heli pitch up, reduce the feeback but never go below "2", this will fail the heli from recovery to level.

To fine tune the aileron, it may be considered to copy the "P" and "I" value to start with, aileron values should be a bit lower than those of elevator

Pirouette

In electronics, the system speed confined by the slowest component and in case of the flybarless system, servo is the weakest link, for best pirouette performance, fast digital servos are preferrable.

With a low speed servo, heli may be unable to give a stable priouette, "Piro Optimisation" can be adjusted to improve the priouette performance.

Do a few pirouette to observe the behaviour, increase piro optimisation by 20 to observe if the performance improved, if yes, keep increase the value until good priouette achieve. If not, decrease the value by 20 interval until good pirouette achieve

Piro optimization threshold - at zero, piro Optimization is inactive, the optimization only activate at more cyclic input when the value is low, you need to adjust this value till it fits your flight style

 

 

 

© 2009 Heli-RND. All Rights Rerserved.

Web Template Design by Communivoice.com