22
E-flite Fokker DVII 250 Slow Flyer Assembly Manual
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
the Fokker DVII 250 Slow Flyer is 1
3
/
4
to 2 inches (44
to 51mm) back from the leading edge of the top wing
as shown with the battery pack installed.
When balancing your model, support the plane upright
at the marks made on the wing with your fingers or
a commercially available balancing stand. This is the
correct balance point for your model.
Adjust the motor battery as necessary so the model is
level or slightly nose down. This is the correct balance
point for your model. You should find the CG to be
very close with the battery installed forward in the
battery area inside the cowling.
After the first flights, the CG position can be adjusted
for your personal preference.
Control Throws
1. Turn on the transmitter and receiver of your
Fokker DVII 250 Slow Flyer. 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 forward will
make the airplane elevator move up.
3. Use a ruler to adjust the throw of the elevator
and rudder. Adjust the position of the pushrod at the
control horn to achieve the following measurements
when moving the sticks to their endpoints.
Elevator Low Rate
Up
3/8-inch
(9mm)
Down
3/8-inch
(9mm)
Elevator High Rate
Up
1/2-inch
(12.5mm)
Down
1/2-inch
(12.5mm)
Rudder Low Rate
Up
1-inch
(25.5mm)
Down
1-inch
(25.5mm)
Rudder High Rate
Up
1
1
/
4
-inch
(31.5mm)
Down
1
1
/
4
-inch
(31.5mm)
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.
