Hobbico UPSTAR Manual Download Page 14

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1. Turn on the transmitter and receiver and center the
trims. If necessary, remove the servo arms from the
servos and reposition them so they are centered.
Reinstall the screws that hold on the servo arms.

2. With the transmitter and receiver still on, check all
the control surfaces to see if they are centered. If
necessary, adjust the clevises on the pushrods to center
the control surfaces.

3. Make certain that the control surfaces and the motor
respond in the correct direction as shown in the
diagram. If any of the controls respond in the wrong
direction, use the servo reversing in the transmitter to
reverse the servos connected to those controls. Be
certain the control surfaces have remained centered.
Adjust if necessary.

Use a ruler to accurately measure and set the control
throw of each control surface as indicated in the chart
that follows. If your radio does not have dual rates, we
recommend setting the throws at the

low

rate setting.

This can be accomplished by moving the clevises
further outward on the control horns.

NOTE

: The throws are measured at the

widest part

the elevator and rudder.

At this stage the model should be in ready-to-fly
condition with all of the systems in place including the
battery pack and the radio system.

❏

1. Use a felt-tip pen or 1/8" [3mm]-wide tape to

accurately mark the C.G. on the bottom of the wing on
both sides of the fuselage. The C.G. is located 2-1/2"
[64 mm] back from the leading edge of the wing.

This is where your model should balance for the first
flights. Later, you may wish to experiment by shifting
the C.G. up to 3/8" [10mm] forward or 3/8" [ 10mm]
back to change the flying characteristics. Moving the
C.G. forward may improve the smoothness and
stability, but the model may then require more speed
for takeoff and make it more difficult to slow for
landing. Moving the C.G. aft makes the model more
maneuverable, but could also cause it to become too
difficult to control. In any case,

start at the

recommended balance point

and do not at any time

balance the model outside the specified range.

More than any other factor, the

C.G.

(balance point) can

have the

greatest

effect on how a model flies, and may

determine whether or not your first flight will be
successful. If you value this model and wish to enjoy it for
many flights,

DO NOT OVERLOOK THIS IMPORTANT

PROCEDURE.

A model that is not properly balanced will

be unstable and possibly unflyable.

BALANCE THE MODEL (C.G.)

IMPORTANT:

The Upstar ARF has been

extensively

flown and tested to arrive at the throws at which it flies
best. Flying your model at these throws will provide you
with the greatest chance for successful first flights. If, after
you have become accustomed to the way the Upstar
ARF flies, you would like to change the throws to suit
your taste, that is fine. However, too much control throw
could make the model difficult to control, so remember,
“more is not always better.”

These are the recommended control surface throws:

High Rate

Low Rate

ELEVATOR

3/8" [10mm] up

1/4" [6mm] up

3/8" [10mm] down

1/4" [6mm] down

RUDDER

7/8" [22mm] right

9/16" [14mm] right

7/8" [22mm] left