E-flite 4-Site F3P 250 ARF - Manual (Page 23)

23 E-flite 4-Site Assembly Manual
Control Throws
 1. Turn on the transmitter and receiver of your
model. Check the movement of the rudder using
the transmitter. When the stick is moved right,
the rudder should also move right. Reverse the
direction of the servo at the transmitter if necessary.
 2. Check the movement of the elevator with the
radio system. Moving the elevator stick toward the
bottom of the transmitter will make the airplane
elevator move up.
 3. Check the movement of the ailerons with the
radio system. Moving the aileron stick right will
make the right aileron move up and the left aileron
move down.
 4. Use a ruler to adjust the throw of the elevator,
ailerons and rudder.
Aileron High Rate
Up 2
1
/
8
-inch (55mm)
Down 2
1
/
8
-inch (55mm)
Aileron Low Rate
Up 1
3
/
16
-inch (30mm)
Down 1
3
/
16
-inch (30mm)
Elevator High Rate
Up 1
3
/
4
-inch (45mm)
Down 1
3
/
4
-inch (45mm)
Elevator Low Rate
Up 1
3
/
16
-inch (30mm)
Down 1
3
/
16
-inch (30mm)
Rudder High Rate
Up 3
1
/
8
-inch (80mm)
Down 3
1
/
8
-inch (80mm)
Rudder Low Rate
Up 2-inch (50mm)
Down 2-inch (50mm)
You will notice that when you get to the full travel of
high rates on the aileron servo you will see a slight
difference in the travel amount from top to bottom due
to the servo linkage offset. This does not affect the
flight performance of the 4-Site.
Measurements are taken at the inner or
widest point on the control surface.
These are general guidelines measured from our own
flight tests. You can experiment with higher rates to
match your preferred style of flying.
Travel Adjust, Sub Trim and Dual Rates are
not listed and should be adjusted according
to each individual model and preference.
Center of Gravity
An important part of preparing the aircraft for flight is
properly balancing the model.
Caution: Do not inadvertently skip this step!
The recommended Center of Gravity (CG) location
for your model is 2
7
/
8
to 3
9
/
16
inches (75–90mm)
back from the leading edge of the top wing at the
center. Make sure to measure from the farthest point
forward for accuracy. Mark the location for the Center
of Gravity on the bottom of the top wing next to the
fuselage as shown.
Adjust components as necessary so the model hangs
level or slightly nose down. This is the correct balance
point for your model. You might find that you need to
shift the battery slightly to either the front or back of
the fuselage to achieve the correct balance.
After the first flights, the CG position can be adjusted
for your personal preference.
You can use a small ball driver or pen to
hold the 4-Site up during balancing.