Center Of Gravity; Control Throws - Hangar 9 Extra 300 ARF 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 your
model is 4 inches to 4 3/4 inches (10.2cm 12cm) to back
from the leading edge of the wing tip as shown. Mark the
location of the CG on the top of the wing with a felt-tipped
pen.
Use help to lift the plane from the marked position.
For precision and IMAC flying, 4 inches (10.2cm) is the
best CG. For the best combination of strong 3D flying and
a more sensitive yet precise feel, 4-3/4 inches (12.7cm) is
recommended.
35% Extra 300 ARF Assembly Manual
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 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 throw meter to adjust the throw of the elevator,
ailerons and rudder.
Mike McConville has three flight modes as follows:
1. Normal: This flight mode is used for most precision
maneuvers.
2. Fast Roll: This flight mode is for aggressive yet precise
aerobatics such as very fast rolling loops, hammers, or
maneuvers needing strong knife edge. It has high-rate
aileron and rudder and low-rate elevator.
3. High (3D): All surfaces at full deflection for 3D flying.
Mike's Extra 300 is balanced at the 4-3/4" CG location.
His setup uses a slight down elevator to throttle mix at very
low throttle stick position for down lines. 6% up elevator to
rudder and 3% opposite aileron to rudder mixing to eliminate
slight coupling in knife edge.
Please note this is very CG dependant.
Elevator:
High Rate: Expo
Up: 50 degrees 70%
Down: 50 degrees 70%
Normal: Expo
Up: 12 degrees 40%
Down: 11 degrees 40%
Aileron:
High Rate: Expo
Up: 40 degrees 50%
Down: 40 degrees 50%
Normal Rate: Expo
Up: 24 degrees 35%
Down: 24 degrees 35%
Rudder:
High: Expo
Right: 45 degrees 45%
Left: 45 degrees 45%
Normal Rate:
Right: 27 degrees 40%
Left: 27 degrees 40%
These are general guidelines measured from our own flight
tests. You can experiment with different rates to match your
preferred style of flying.
If using the Spektrum DX-8, Mike's personal setup can
be downloaded from the Spektrum Community website
at: https://community.spektrumrc.com/.
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