Instruction manual

XIX. FIRST FLIGHT ADJUSTMENTS

Before flying double check direction of each control; tail rotor compensation direction and gyro direction. The

first few flights should be limited to hovering only.

Engine Carburetor Settings:

With the engine running, set the idle adjustments to enable the engine to maintain a rich reliable idle (trying to four

cycle) at low throttle, mid to high trim. Set the high speed needle to accelerate, but slightly rich. The motor should

transition smoothly from high rpm=s to low rpm=s during the flight of the helicopter. Short duration vertical climbs

to test the top end are the safest method to get the high speed needle valve setting close.

Throttle and Pitch Curve:

After the needle valves are adjusted the model can be trimmed for hover. The throttle curve should be adjusted so

that the model is almost to the hover head speed just above quarter stick. This helps the model lift off smoothly

and also allows you to do slow vertical descents without the engine dropping out. The throttle curve above half

stick should also be adjusted so that slow vertical ascents can be made without the engine speeding up or slowing

down. Simultaneously adjust the hover pitch and hover throttle for the desired hovering RPM at half stick. Next

adjust the high and low side of the normal pitch curve until the model has the collective response you want in a

hover.

Tail Rotor Trimming:

Adjust tail rotor trim as per your gyro instructions.

Tail Rotor Compensation for Torque:

(Note: Not required if you own a heading lock gyro). All adjustments are made from hover (at least 15= in height )

with a Atrimmed@ tail rotor. When properly adjusted the model should not rotate to the right or left when ascending

or descending. See your radio manufacturers instruction manual.

Swash Plate Trimming:

When the helicopter drifts to the left or the right, adjust aileron transmitter trimmer until stabilized. Re-center

trimmer and adjust lower swash plate aileron rods until stabilized again. Repeat same process for fore and aft

(elevator) control.

Main Rotor A

ADynamic@

@ Blade Tracking:

The tracking of the main rotor blades may be checked just prior to lift-off. Be sure to maintain a safe distance

from your machine. The adjustments can be made by changing the length of the hiller rod (#120-25) on each side

of the head. A piece of colored tape may be applied to one blade during balancing or tracking in order to visually

determine which blade is high or low.

Tracking Procedure:

-Low blade speed >> Lower the high blade

-High blade speed >> Raise the low blade

-If blades are out of track 2@ or more >> Re-check original pitch settings

Setting Top Pitch:

Adjust the top pitch on you idle-up functions so that the model will fly at full throttle and maintain proper head

speed. Too much top end pitch/ too low RPM tends to be Apitchy@ and unstable.