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Center of gravity, Control throws – E-flite Fokker DVII 250 ARF User Manual

Page 22

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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.