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Center of gravity, Control throws – E-flite Hawker Hurricane 25e PNP User Manual

Page 19

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19

E-flite Hurricane 25e PNP/BNF Assembly Manual

EN

Center of Gravity

Required Parts

Assembled airframe

Required Tools and Adhesives

Balancing stand

Felt-tipped pen

CAUTION: Do not inadvertently skip this step or

property damage and injury could occur.

When balancing 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 as shown in this manual. Mark the

location of the battery on the battery tray using a felt-

tipped pen so it can be returned to this position if it is

removed from your model.
After the first flights, the CG position can be adjusted

for your personal preference.

1. The recommended Center of Gravity (CG)

location for your model is 3.50 to 3.75 inches (89

to 95mm) back from the leading edge of the wing

as shown with the battery pack installed. Mark the

location of the CG on the top of the wing with a felt-

tipped pen.

2. When balancing your model, support the plane

inverted at the marks made on the top of the wing

with your fingers or a commercially available

balancing stand. This is the correct balance point

for your model. Make sure your model is assembled

and ready for flight before balancing.

Balancing Stand

If you have installed retracts, balance

your model with the gear down.

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 makes the airplane elevator move

up.

3. Check the movement of the ailerons with the

radio system. Moving the aileron stick right makes

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. Adjust the position of the

pushrod at the control horn to achieve the following

measurements when moving the sticks to their

endpoints.

Aileron

High Rate

Up: 3/4-inch 19mm

30% Expo

Down:

3/4-inch

19mm

30% Expo

Low Rate

Up: 1/2-inch 13mm

20% Expo

Down:

1/2-inch

13mm

20% Expo

Elevator

High Rate

Up: 7/8-inch 23mm

25% Expo

Down:

7/8-inch

23mm

25% Expo

Low Rate

Up: 1/2-inch 13mm

20% Expo

Down:

1/2-inch

13mm

20% Expo