Control Throws; Computer Radio Enhancements - Hangar 9 Extra 260 Assembly Manual

Control Throws

Setting the control throws for your Extra 260 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.

Step 1
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.

Step 2
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.

Step 3
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 back
in Step 2.

Step 4
If setting a dual elevator or aileron, match the linkage
locations used back in Step 3. 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.

Computer Radio Enhancements

A computer radio will allow you to do quite a bit of
fine-tuning to the feel of the Extra 260, which will make
aerobatics even easier.
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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.
Aileron:
High Rate: 34.4 Degrees up, 54% Exponential
33 Degrees down, 54% Exponential
Low Rate: 23 Degrees up, 40% Exponential
22 Degrees down, 40% Exponential
Elevator:
High Rate: 48.5 Degrees up, 75% Exponential
47 Degrees down, 75% Exponential
Low Rate: 13 Degrees up, 45% Exponential
13 Degrees down, 45% Exponential
Rudder:
High Rate: 44 Degrees right, 50% Exponential
44 Degrees left, 50% Exponential
Low Rate: 30 Degrees right, 50% Exponential
30 Degrees left, 50% Exponential