Lateral Balance; Control Throws - Phoenix Model Preceptor ARF EDF 90mm Instruction Manual

Instruction Manual
OPEN AND CLOSE the canopy
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 GRAVITY IS LOCATED
165-170mm BACK FROM THE LEADING
EDGE OF THE WING, AT THE FUSELAGE.
This location is recommended for initial test
flying and trimming. BALANCE A PLANE
UPSIDE DOWN WITH THE FUEL TANK
EMPTY.
2. Mount the wing to the fuselage. Using a couple
of pieces of masking tape, place them on the
top side of the wing 165-170mm 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.
4. If the nose of the plane falls, the plane is nose
heavy. To correct this first move the battery
pack further back in the fuselage. If this is not
possible or does not correct it, stick small
amounts of lead weight on the fuselage under
the horizontal stabilizer. If the tail of the plane
falls, the plane is tail heavy. To correct this,
move the battery and receiver forward or if this
is not possible, stick weight into the firewall.
When balanced correctly, the airplane should
sit level or slightly nose down when you lift it up
with your fingers.
Open and Close
75
165-170mm
12
PRECEPTOR 90MM

LATERAL BALANCE

After you have balanced a plane on the C.G.
You should laterally balance it. Doing this will
help the airplane track straighter.
5. Turn the airplane upside down. Attach one loop
of heavy string to the engine crankshaft and
one to the tail wheel wire. With the wings level,
carefully lift the airplane by the string. This may
require two people to make it easier.
6. If one side of the wing fall, that side is heavier
than the opposite. Add small amounts of lead
weight to the bottom side of the lighter wing
half's wing tip. Follow this procedure until the
wing stays level when you lift the airplane.

CONTROL THROWS

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.
LOW RATE
Ailerons : 8mm up
Elevator : 8mm up
Rudder : 20mm right 20mm left
Flap T/O: 15mm - Landing 20mm
8mm down
8mm down
8mm
8mm
Aileron Control
8mm
8mm
Elevator Control
20mm
20mm
Rudder Control
15mm
Flap Control