Evolution 80GX Especificaciones descargar pdf (Pagina 25)

25Hangar 9 Sukhoi SU-26MM SE

Checking the Control Linkages and

Centering the Control Surfaces

Required Parts

Assembled airframe Transmitter

Required Tools and Adhesives

Ruler

Adjustable wrench or linkage tool

 1. Check the position of the control horn using the

diagram below. The measurements should be as

follows:

Aileron: 1

-inch (26mm)

Elevator: 5/8-inch (16mm)

Rudder: 11/16-inch (18mm)

If the measurements do not match, disconnect the

linkage and thread the control horn up or down to

achieve the correct measurement.

Check this measurement

*Drawing not to scale

 2. Check that the linkages have been connected to the

correct holes in the servo arms. The measurements

will be as follows:

Aileron: 1

-inch (31.75mm) (inner hole)

Elevator: 1

-inch (31.75mm) (inner hole)

Rudder: 1

-inch (38mm) (outer hole)

If the measurements do not match, disconnect the

linkage and connect it to the correct hole as shown in

the drawing in Step 3.

 3. Turn on the radio system. Make sure the sticks and

trims are centered for the ailerons, elevators and

rudder. The servo horns for the rudder and elevator

must be perpendicular to the servo. It may be

necessary to use the sub-trim feature of your radio

system to center these servos.

Align Perpendicular

-inch

(31.75mm)

-inch

(38mm)

 4. Check the alignment of the aileron servo horn. It

must be aligned with the aileron hinge line. If not, use

the radio sub-trim feature to correct its alignment.

 5. Now that the servos are centered and the control

horns set to the correct height, you can adjust the

linkage length so the control surfaces are centered.

Using a Hangar 9 linkage tool will make this process

easier, but an adjustable wrench works just fine for

this adjustment.

Control Throws

Setting the control throws for your Sukhoi does require

some attention to detail. To correctly set the throws, it is

highly suggested to use the following procedure to achieve

the greatest mechanical advantage from your servos.

Determine the maximum amount of control surface throw

from the throws listed. Use the high rate throws listed to

set the maximum amount of throw, then use your computer

radio for the lower rate listed.

Set the Travel Adjust (ATV on a Futaba transmitter) to about

15% under the max. (On a JR transmitter, that is 135%.)

Make sure to set both directions during this process.

Adjust the position of the clevis on the control horn and

position of the ball link on the servo arm to achieve the

throw decided in Step 1. It is highly recommended not to

change the position on the servo arm unless absolutely

necessary. Use Travel Adjust (ATV) to finalize the throws.

That is why we left a little margin in the percentages.

If setting a dual elevator or aileron, match the linkage

locations. Increase or decrease the Travel Adjust (ATV) a

few points as necessary to fine-tune the throws to match

up left and right sides and up and down throws so all is

symmetrical.

This is all necessary to tune the mechanical advantage as

good as possible. When setting up a model for 3D, the

mechanical advantage will be less because of the large

throws, and thus the servo will work harder and wear faster.

Using an insufficient servo for the job, or trying to get too

much throw, will cause something to give, probably the

servo.

There isn’t an exact geometry to the linkage, as it depends

on how much throw each individual modeler requires. The

linkage geometry should always be maximized so the servo

isn’t working any harder than it has to.

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Evolution 80GX Especificaciones Pagina 25

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