38
Lateral (Roll) Balance:
Roll is controlled by the aircraft ailerons and if not balanced, the left and right aileron response will not be
uniform or equal. Also, during loops and other aerobatics, one of the wings is likely to droop and cause an adverse
and undesired flight path.
In this procedure you will balance along the lateral or roll axis. This axis is a line extending from the tip of the
spinner straight back along the thrust line to the planes’ tail. This balance will keep the wing more level during
maneuvers, and is mandatory for good aerobatic performance.
With the plane upside down, tie a string to the propeller shaft and another to the tail area along the thrust line.
With the assistance of another, lift the plane using the strings and observe which, if any, of the wings panels drops.
Add weight to the opposite wing at the wing tip by drilling a small hole and adding weight, secured with epoxy. Add
and/or remove weight to achieve perfect lateral balance. Cover the hole with a small piece of OraCover©.
Yaw Balancing:
Aircraft yaw is controlled by the aircraft’s rudder. This axis is not as important as Pitch and Roll; however,
if you have adjusted the pitch balance correctly, the yaw should be set adequately.
Control Throws:
The control throw is the amount, any one of the control surfaces, can move and is
generally measured in inches above or below the neutral position or in degrees of deflec-
tion relative to the neutral position.
GSRC will give three ranges: 1) for intermediate sport-pilots; 2) for intermediate to
advance aerobatic pilots; and 3) for advanced, 3-D or freestyle pilots.
We will address adjusting the control throws using mechanical adjustments in the
servo control arms, push-rods and length of the control surface horns.
There are two ways to adjust the control throws:
1. Mechanical: Using the servo arms, push-rods and control horns
2. Transmitter adjustments: Using computer-controls and multilevel rates or rate switches. Adjust-
ments in this manor are beyond the scope of this assembly manual and we refer you to your
transmitter manual for assistance.
For Intermediate Sport Pilots:
Up
Down
Deflection (deg)
Elevators:
3/8 - 1/2 inches
3/8 - 1/2 inches
~ 10 deg
Ailerons:
3/8 - 1/2 inches
3/8 - 1/2 inches 10 - 15 deg
Rudder:
1-1/2 - 1-3/4 inches left and right
For Intermediate to Advance Aerobatic Pilots:
Up
Down
Deflection (deg)
Elevators:
3/4 - 1 inches 3/4 - 1 inches
~ 16 deg
Ailerons:
3/4 - 1 inches
3/4 - 1 inches
21 - 30 deg
Rudder:
1-3/4- 2 inches left and right
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