Instruction manual

Final Adjustments - Tail Rotor Setup

11. Final Preparations

Once the tail rudder pushrod is adjusted correctly so the tail does not rotate ( don’t consider wind now ) the revolution mixing

can be adjusted.

*Revolution Mixing

The revolution mixing function allows the helicopter to climb or descend without the tail rotating. These setting are set when

using regular piezo rate gyros, if using a Heading Hold gyro remove all tail mixing. There is a high & low setting on the helicop-

ter radio.

The values shown will vary depending on motor, blade pitch and battery voltage but provide a starting point for the beginner.

For each ﬂ ight mode setting, there will be different Revo-mixing amounts. For forward ﬂ ight the settings will be lower than hov-

ering due to the aerodynamic forces effecting the helicopter. Here is a starting point for revo values:

High stick setting: 40

Low stick setting: 20

These values correspond to the total travel for the tail rotor pitch. To adjust the high setting, hold the helicopter at hover and

increase the throttle so the helicopter climbs steadily. Notice the direction the nose rotates:

Nose rotates

left increase revo value to increase tail pitch.

right decrease revo value to decrease tail pitch.

To adjust the low setting, start from a high hover and decrease the throttle to descend, notice which direction the helicopter

rotates.

Gyro Gain Adjustment

The gyro assists in holding the tail rotor, actually compensating for changes in wind direction or quick movements.

First check that the gyro is installed correctly by watching the rudder servo. While holding the rotor head move the rudder

stick to the right and observe the direction the servo arm moves. Now quickly rotate the nose to the left, the servo horn should

move in the same direction. If the rudder servo horn moves in the opposite direction reverse the gyro direction.

Generally the starting setting for the gyro gain is 60%, keep increasing the gain setting until the tail starts oscillating back and

forth, then reduce the setting slightly.

Problem: Tail rotor makes sudden uncontrolled rotations.

Action: The gyro direction is possibly set in the wrong direction.

Normal ﬂ ight

mode

High

Low

Before Flying Your Helicopter

Before each ﬂ ight, check that all bolts and screws are tight. Simply ﬂ ying your helicopter, will loosen any screws which are not

threadlocked or secured with a lock nut.

First Flights

For the beginner pilot, a training pod is strongly recommended to assist in learning to hover the helicopter with substantially

reduced risk of crashing. These systems provide an on ground training capability to allow pilots to become familiar with the

helicopter before actually leaving the ground. (Optional Item) Part # CN2007A.

Radio

Always turn the transmitter on ﬁ rst, then the turn on your receiver. Before every ﬂ ight, it is recommended that a range check

is performed. This is performed by walking away from your helicopter with the antenna fully collapsed to 30 paces and have

someone verify that all control surfaces are operating. If at any time the inputs being provided changes (signaled by the per-

son assisting you), then there may possibly be a communication problem. If you do not make this distance, have an experi-

enced modeler check over your setup, do not ﬂ y until then.

22.