Trim And Subtrim - Ko Propo Esprit-3 Universe Instruction Manual

The sub trim is a convenient function, but when the procedure is performed incorrectly the settings
become rather complicated. Please use the sub trim with the correct procedure.
Please refer to the sub trim (P34) about the method of using this function.
Purpose of Sub Trim
Normally a servo is installed after it has been connected to the receiver and the neutral setting is confirmed on
the transmitter.
Sometimes the car will not necessarily run straight and thus the neutral position must be corrected on the
steering servo. Also the throttle servo installed in a gas car must have the neutral position set correctly for the
carburetor.
Originally, the function to correct the neutral position is called the "trim". However, the correction made by the
trim is not only adjusted for centering the servo, but for also compensating for a tweaked chassis, uneven tire
wear, etc.
The problem occurs when this is corrected with the normal trim.
Using the steering wheel trim to make a car run straight changes the end points for the steering movement.
For a gas car the throttle trim used, the position of the maximum amount of brake or throttle movement is
changed.
The trim usually is used as a method to call the "Center Trim" and only a
central position (neutral).
However, if you are trying to correct neutral position by using the center
trim, this may also cause a problem for other settings.
To help in setting the neutral position of the servo we have provided the
Sub Trim feature.
With the center trim and sub trim, a reasonable setting can be obtained
when using them together.
Center Trim
The figure to the right (top) shows the setting of the Sub Trim.
When the Sub Trim is moved, the total travel is also move according to
the center position and thus the end point will change.
On the other hand, if the Center Trim is moved, the end points do not change for the total travel movement.
However, adjusting the neutral position with a large value using the center trim will make the right and left
balance become more or less in either direction.
Actual Setting Order
Set up your linkage to try to make the servo as close to neutral as possible and then perform the Sub
Trim operation. If the Sub Trim value is set to a large value, please try setting it up again.
Try testing the movement and verify it is at neutral. You can also try correcting it again with the Sub
Trim if you need to. Once the neutral setting is confirmed, the right and left end points should be
adjusted with the 'STEERING BALANCE' (P58) and the overall travel should be adjusted with the
'STEERING TRAVEL' (P49).
Adjusting the neutral position during an actual race or practice should be corrected with the Trim (Center
Trim). If the Trim (Center Trim) value starts to become large, readjust the Sub Trim but make sure to
reset the Trim value back to 0.
When setting up the car before running, use the Sub Trim without using the Trim (Center Trim).
Install the servo and horn correctly to try to make the Sub Trim value as small as you can.
If the neutral setting changes while running, correct it by using the Trim (Center Trim).
Usage of Trim and Sub Trim
Sub Trim can be called up
from the function menu.
The steering trim can be
allocated to the ET lever from
the 'SET UP' function.
Sub Trim
The factory default setting
for the steering trim is
allocated to ET1 lever and the
throttle trim is ET2 lever.
Trim
(Center Trim)
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