29
Set the Control Throws
Use a Great Planes AccuThrow (or 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.
NOTE
: The throws are measured at the
widest part
of the
elevators, rudder and ailerons.
These are the recommended control surface throws:
ELEVATOR
HIGH RATE
LOW RATE
5/8"
[16mm]
15°
Up
5/8"
[16mm]
15°
Down
7/16"
[11mm]
11°
Up
7/16"
[11mm]
11°
Down
RUDDER
1-1/8"
[29mm]
20°
Right
1-1/8"
[29mm]
20°
Left
1/2"
[13mm]
9°
Right
1/2"
[13mm]
9°
Left
AILERONS
7/16"
[11mm]
20°
Up
7/16"
[11mm]
20°
Down
5/16"
[8mm]
14°
Up
5/16"
[8mm]
14°
Down
IMPORTANT:
The Christen Eagle .46 ARF has been
extensively
fl own and tested to arrive at the throws at
which it fl ies best. Flying your model at these throws will
provide you with the greatest chance for successful fi rst
fl ights. If, after you have become accustomed to the way
the Christen Eagle fl ies, you would like to change the
throws to suit your taste, that is fi ne. However, too much
control throw could make the model diffi cult to control, so
remember, “more is not always better.”
Balance the Model (C.G.)
More than any other factor, the
C.G.
(balance point) can
have the
greatest
effect on how a model fl ies, and may
determine whether or not your fi rst fl ight will be successful.
If you value this model and wish to enjoy it for many fl ights,
DO NOT OVERLOOK THIS IMPORTANT PROCEDURE.
A model that is not properly balanced will be unstable and
possibly unfl yable.
At this stage the model should be in ready-to-fl y condition
with all of the systems in place including the engine or
brushless motor, landing gear, and the radio system (and
battery packs if applicable).
3-15/16"
[100mm]
❏
1. Use a felt-tip pen or 1/8" [3mm]-wide tape to accurately
mark the C.G. on the bottom of the top wing on both sides
of the fuselage. The C.G. is located 3-15/16" [100mm] back
from the center of the top wing at the leading edge.
This is where your model should balance for the fi rst fl ights.
Later, you may wish to experiment by shifting the C.G. up to
1/8" [3mm] forward or 1/8" [3mm] back to change the fl ying
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 diffi cult to slow
for landing. Moving the C.G. aft makes the model more
maneuverable, but could also cause it to become too
diffi cult to control. In any case,
start at the recommended
balance point
and do not at any time balance the model
outside the specifi ed range. Please note that, unlike some
models, this model has a very small balancing range
which has been determined to be a safe range.
❏
2. Because of the position of the landing gear and lower
wing, the base of the Great Planes CG Machine
™
must be
raised on the aft end if you choose to use one. We used a
block of wood approximately 2" [51mm] tall as shown.
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