Seagull Models SEA238 - Balancing the Airplane; Control Throws

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BALANCING.
1) It is critical that your airplane be
balanced correctly. Improper balance will
cause your plane to lose control and
crash. THE CENTER OF GRAV-
ITY IS LOCATED 75MM BACK
FROM THE LEADING EDGE OF
THE WING AT THE WING ROOT.
2) Mount the wing to the fuselage. Place
a piece of masking tape on the bottom of
each wing 75mm back from the leading
edge at the wing root.
3) With the model upright, place your
ngers on the masking tape and carefully
li the plane. is is the point at which
your model should balance for your rst
ights. Later, you may wish to experi-
ment by shiing the balance up to 75mm
forward or back to change the ying
characteristics. Moving the balance for-
ward may improve the smoothness and
arrow- like tracking, but it may then re-
quire more speed for take o and make it
more dicult to slow down for landing.
Moving the balance a makes the model
more agile with a lighter and snappier
”feel”. In any case, please start at the loca-
tion we recommend.
With the wing attached to the fuselage,
all parts of the model installed ( ready to
y), and empty fuel tanks, hold the mod-
el at the marked balance point with the
stabilizer level.
Li the model. If the tail drops when
you li, the model is “tail heavy” and you
must add weight* to the nose. If the nose
drops, it is “nose heavy” and you must
add weight* to the tail to balance.
75mm
CONTROL THROWS.
Ailerons:
High Rate :
Up : 25 mm
Down : 25 mm
Low Rate :
Up : 15 mm
Down : 15 mm
Elevator:
High Rate :
Up : 25 mm
Down : 25 mm
Low Rate :
Up : 15 mm
Down : 15 mm
Rudder:
High Rate :
Right : 30 mm
Le : 30 mm
Low Rate :
Right : 20 mm
Le : 20 mm
*If possible, rst attempt to balance the
model by changing the position of the re-
ceiver battery and receiver. If you are un-
able to obtain good balance by doing so,
then it will be necessary to add weight to
the nose or tail to achieve the
proper balance point.