17
NOORDUYN NORSEMAN Item code: BH157
.
Instruction Manual
BALANCINg
1)
It is critical that your airplane be balanced cor-
rectly. Improper balance will cause your plane to lose
control and crash.
THE CENTER OF GRAVITY IS LOCATED
70MM
BACK
FROM THE LEADING EDGE OF THE WING.
2)
Mount the wing to the fuselage. Using a couple
of pieces of masking tape, place them on the top side
of the wing
70mm
back from the leading edge, at the
fuselage sides.
3)
Turn the airplane upside down. Place your fingers
on the masking tape and carefully lift the plane.
Accurately mark the balance point on the top of the
wing on both sides of the fuselage. The balance point
is located
70mm
back from the leading edge. This is
the balance point at which your model should balance
for your first flights. Later, you may wish to experiment
by shifting the balance up to 10mm forward or back to
change the flying characteristics. Moving the balance
forward may improve the smoothness and arrow- like
tracking, but it may then require more speed for take
off and make it more difficult to slow down for landing.
Moving the balance aft makes the model more agile
with a lighter and snappier ”feel”. In any case, please
start at the location we recommend.
With the wing attached to the fuselage, all parts of the
model installed ( ready to fly), and empty fuel tanks,
hold the model at the marked balance point with the
stabilizer level.
Lift the model. If the tail drops when you lift, the model
is “tail heavy” and you must add weigh* to the nose. If
the nose drops, it is “nose heavy” and you must add
weight* to the tail to balance.
*If possible, first attempt to balance the model by chang-
ing the position of the receiver battery and receiver. If
you are unable 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.
PRE-FLIgHT CHECk
1)
Completely charge your transmitter and receiver
batteries before your first day of flying.
2)
Check every bolt and every glue joint in your
plane to ensure that everything is tight and well bonded.
3)
Double check the balance of the airplane.
4)
Check the control surface.
5)
Check the receiver antenna. It should be fully
extended and not coiled up inside the fuselage.
6)
Properly balance the propeller.
We wish you many safe
and enjoyable flights with your
NOORDUYN NORSEMAN
.
70mm
CG
1)
We highly recommend setting up a plane using
the control throws listed.
2)
The control throws should be measured at the
widest point of each control surface.
3)
Check to be sure the control surfaces move in
the correct directions.
Ailerons :
10 mm up
10 mm down
Flap :
25 mm down.
Elevator :
8 mm up
8 mm down
Rudder :
20 mm right
20 mm left
CONTROL THROWS
10 mm
10 mm
25 mm
8 mm
8 mm
20 mm
20 mm
Flap control
Aileron control
Elevator control
Rudder control